TY  - JOUR
AU  - Jokanović, Vukoman
AU  - Vilotijević, Miroljub
AU  - Jokanović, Bojan
AU  - Jenko, Monika
AU  - Anžel, Ivan
AU  - Stamenković, Dragoslav
AU  - Lazić, Vojkan
AU  - Rudolf, Rebeka
PY  - 2014
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1954
AB  - In this research, the structure changes along the depth gradient layers of titanium substrate, after etching with NaOH and subsequent thermal treatment at various temperatures between 300 and 800 degrees C, were investigated by XRD, FTIR and AES. Particularly, the changes of Ti substrate after etching with NaOH, subsequent ionic exchange of Na+ with Ca2+ ions and thermal treatment at 700 degrees C were analysed. Due to this approach, it was possible to get insight into the chemical changes and changes of Ti oxidation states and consequent phase analysis, along the depth of the titanium oxide coatings. In addition, Secondary Electron Imaging (SEI) showed very interesting nanotopology of all samples. Particularly interesting topology, consisting of very thin nano-designed walls between mutually interconnected pores, was observed for the sample in which Na+ were replaced with Ca2+ ions. This structure might be suitable for deposition of hydroxyapatite by biomimetic or plasma methods and as an appropriate scaffold for cell adhesion and proliferation.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Corrosion Science
T1  - Investigations of corrosion on the surface of titanium substrate caused by combined alkaline and heat treatment
VL  - 82
SP  - 180
EP  - 190
DO  - 10.1016/j.corsci.2014.01.014
ER  - 

@article{
author = "Jokanović, Vukoman and Vilotijević, Miroljub and Jokanović, Bojan and Jenko, Monika and Anžel, Ivan and Stamenković, Dragoslav and Lazić, Vojkan and Rudolf, Rebeka",
year = "2014",
abstract = "In this research, the structure changes along the depth gradient layers of titanium substrate, after etching with NaOH and subsequent thermal treatment at various temperatures between 300 and 800 degrees C, were investigated by XRD, FTIR and AES. Particularly, the changes of Ti substrate after etching with NaOH, subsequent ionic exchange of Na+ with Ca2+ ions and thermal treatment at 700 degrees C were analysed. Due to this approach, it was possible to get insight into the chemical changes and changes of Ti oxidation states and consequent phase analysis, along the depth of the titanium oxide coatings. In addition, Secondary Electron Imaging (SEI) showed very interesting nanotopology of all samples. Particularly interesting topology, consisting of very thin nano-designed walls between mutually interconnected pores, was observed for the sample in which Na+ were replaced with Ca2+ ions. This structure might be suitable for deposition of hydroxyapatite by biomimetic or plasma methods and as an appropriate scaffold for cell adhesion and proliferation.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Corrosion Science",
title = "Investigations of corrosion on the surface of titanium substrate caused by combined alkaline and heat treatment",
volume = "82",
pages = "180-190",
doi = "10.1016/j.corsci.2014.01.014"
}

Jokanović, V., Vilotijević, M., Jokanović, B., Jenko, M., Anžel, I., Stamenković, D., Lazić, V.,& Rudolf, R.. (2014). Investigations of corrosion on the surface of titanium substrate caused by combined alkaline and heat treatment. in Corrosion Science
Pergamon-Elsevier Science Ltd, Oxford., 82, 180-190.
https://doi.org/10.1016/j.corsci.2014.01.014

Jokanović V, Vilotijević M, Jokanović B, Jenko M, Anžel I, Stamenković D, Lazić V, Rudolf R. Investigations of corrosion on the surface of titanium substrate caused by combined alkaline and heat treatment. in Corrosion Science. 2014;82:180-190.
doi:10.1016/j.corsci.2014.01.014 .

Jokanović, Vukoman, Vilotijević, Miroljub, Jokanović, Bojan, Jenko, Monika, Anžel, Ivan, Stamenković, Dragoslav, Lazić, Vojkan, Rudolf, Rebeka, "Investigations of corrosion on the surface of titanium substrate caused by combined alkaline and heat treatment" in Corrosion Science, 82 (2014):180-190,
https://doi.org/10.1016/j.corsci.2014.01.014 . .

TY  - JOUR
AU  - Fercec, Janko
AU  - Kos, Matija
AU  - Bruncko, Mihael
AU  - Anžel, Ivan
AU  - Glišić, Branislav
AU  - Marković, Evgenija
AU  - Rudolf, Rebeka
PY  - 2014
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1937
AB  - The aim of this paper was to analyse the characteristic properties of six different, commercially available nickel-titanium orthodontic wires with a diameter of 0.305 mm (0.014"). The characteristic properties were determined by using semi-quantitative EDX analyses, DSC analyses for a determination of the phase temperatures, and a tensile test to obtain the mechanical properties of the wires. The investigation of the chemical composition showed an equiatomic NiTi alloy. Analyses of phase temperatures showed that the nickel-titanium orthodontic wires were, in an austenitic microstructure, exhibiting a superelastic effect in the oral environment. The uniaxial tensile stress strain curves showed different values for the beginning and the end of the transformation range during the loading.
PB  - Institute of Metals and Technology
T2  - Materiali in Tehnologije
T1  - Comparison of niti orthodontic archwires and a determination of the characteristic properties
VL  - 48
IS  - 1
SP  - 99
EP  - 104
UR  - https://hdl.handle.net/21.15107/rcub_smile_1937
ER  - 

@article{
author = "Fercec, Janko and Kos, Matija and Bruncko, Mihael and Anžel, Ivan and Glišić, Branislav and Marković, Evgenija and Rudolf, Rebeka",
year = "2014",
abstract = "The aim of this paper was to analyse the characteristic properties of six different, commercially available nickel-titanium orthodontic wires with a diameter of 0.305 mm (0.014"). The characteristic properties were determined by using semi-quantitative EDX analyses, DSC analyses for a determination of the phase temperatures, and a tensile test to obtain the mechanical properties of the wires. The investigation of the chemical composition showed an equiatomic NiTi alloy. Analyses of phase temperatures showed that the nickel-titanium orthodontic wires were, in an austenitic microstructure, exhibiting a superelastic effect in the oral environment. The uniaxial tensile stress strain curves showed different values for the beginning and the end of the transformation range during the loading.",
publisher = "Institute of Metals and Technology",
journal = "Materiali in Tehnologije",
title = "Comparison of niti orthodontic archwires and a determination of the characteristic properties",
volume = "48",
number = "1",
pages = "99-104",
url = "https://hdl.handle.net/21.15107/rcub_smile_1937"
}

Fercec, J., Kos, M., Bruncko, M., Anžel, I., Glišić, B., Marković, E.,& Rudolf, R.. (2014). Comparison of niti orthodontic archwires and a determination of the characteristic properties. in Materiali in Tehnologije
Institute of Metals and Technology., 48(1), 99-104.
https://hdl.handle.net/21.15107/rcub_smile_1937

Fercec J, Kos M, Bruncko M, Anžel I, Glišić B, Marković E, Rudolf R. Comparison of niti orthodontic archwires and a determination of the characteristic properties. in Materiali in Tehnologije. 2014;48(1):99-104.
https://hdl.handle.net/21.15107/rcub_smile_1937 .

Fercec, Janko, Kos, Matija, Bruncko, Mihael, Anžel, Ivan, Glišić, Branislav, Marković, Evgenija, Rudolf, Rebeka, "Comparison of niti orthodontic archwires and a determination of the characteristic properties" in Materiali in Tehnologije, 48, no. 1 (2014):99-104,
https://hdl.handle.net/21.15107/rcub_smile_1937 .

TY  - JOUR
AU  - Fercec, Janko
AU  - Glišić, Branislav
AU  - Šćepan, Ivana
AU  - Marković, Evgenija
AU  - Stamenković, D.
AU  - Anžel, Ivan
AU  - Flasker, J.
AU  - Rudolf, Rebeka
PY  - 2012
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1767
AB  - This study was addressed to use knowledge about the orthodontic system with numerical simulation of the finite elements method. For the first time we simulated the stresses on the orthodontic system and, in this manner, calculated the orthodontic force on the tooth. A 3D orthodontic model or orthodontic system was designed resembling moderate crowding in the dental arch with all supporting structures. CATIA V5 computer software was used to set up a model for the orthodontic system and ABAQUS was used for simulation of the stresses on the orthodontic system. Our attention was focused on the stresses on the tooth lateral incisor and its periodontal ligament. The results of the numerical simulation showed complex stresses on the tooth lateral incisor and its periodontal ligament. In this paper there is presented a calculation of the orthodontic force acting on the tooth lateral incisor due to the orthodontic wire. This orthodontic force was calculated from the stresses on the bracket. The calculated orthodontic force was in the area which is considered as the optimal orthodontic force for movement of the tooth.
PB  - Polish Acad Sciences Inst Physics, Warsaw
T2  - Acta Physica Polonica A
T1  - Determination of Stresses and Forces on the Orthodontic System by Using Numerical Simulation of the Finite Elements Method
VL  - 122
IS  - 4
SP  - 659
EP  - 665
UR  - https://hdl.handle.net/21.15107/rcub_smile_1767
ER  - 

@article{
author = "Fercec, Janko and Glišić, Branislav and Šćepan, Ivana and Marković, Evgenija and Stamenković, D. and Anžel, Ivan and Flasker, J. and Rudolf, Rebeka",
year = "2012",
abstract = "This study was addressed to use knowledge about the orthodontic system with numerical simulation of the finite elements method. For the first time we simulated the stresses on the orthodontic system and, in this manner, calculated the orthodontic force on the tooth. A 3D orthodontic model or orthodontic system was designed resembling moderate crowding in the dental arch with all supporting structures. CATIA V5 computer software was used to set up a model for the orthodontic system and ABAQUS was used for simulation of the stresses on the orthodontic system. Our attention was focused on the stresses on the tooth lateral incisor and its periodontal ligament. The results of the numerical simulation showed complex stresses on the tooth lateral incisor and its periodontal ligament. In this paper there is presented a calculation of the orthodontic force acting on the tooth lateral incisor due to the orthodontic wire. This orthodontic force was calculated from the stresses on the bracket. The calculated orthodontic force was in the area which is considered as the optimal orthodontic force for movement of the tooth.",
publisher = "Polish Acad Sciences Inst Physics, Warsaw",
journal = "Acta Physica Polonica A",
title = "Determination of Stresses and Forces on the Orthodontic System by Using Numerical Simulation of the Finite Elements Method",
volume = "122",
number = "4",
pages = "659-665",
url = "https://hdl.handle.net/21.15107/rcub_smile_1767"
}

Fercec, J., Glišić, B., Šćepan, I., Marković, E., Stamenković, D., Anžel, I., Flasker, J.,& Rudolf, R.. (2012). Determination of Stresses and Forces on the Orthodontic System by Using Numerical Simulation of the Finite Elements Method. in Acta Physica Polonica A
Polish Acad Sciences Inst Physics, Warsaw., 122(4), 659-665.
https://hdl.handle.net/21.15107/rcub_smile_1767

Fercec J, Glišić B, Šćepan I, Marković E, Stamenković D, Anžel I, Flasker J, Rudolf R. Determination of Stresses and Forces on the Orthodontic System by Using Numerical Simulation of the Finite Elements Method. in Acta Physica Polonica A. 2012;122(4):659-665.
https://hdl.handle.net/21.15107/rcub_smile_1767 .

Fercec, Janko, Glišić, Branislav, Šćepan, Ivana, Marković, Evgenija, Stamenković, D., Anžel, Ivan, Flasker, J., Rudolf, Rebeka, "Determination of Stresses and Forces on the Orthodontic System by Using Numerical Simulation of the Finite Elements Method" in Acta Physica Polonica A, 122, no. 4 (2012):659-665,
https://hdl.handle.net/21.15107/rcub_smile_1767 .

TY  - JOUR
AU  - Raić, Karlo T.
AU  - Rudolf, Rebeka
AU  - Ternik, Primoz
AU  - Zunić, Zoran
AU  - Lazić, Vojkan
AU  - Stamenković, Dragoslav
AU  - Tanasković, Tatjana
AU  - Anžel, Ivan
PY  - 2011
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1642
AB  - This work presents the possibility of numerical modelling using Computational Fluid Dynamics (CFD) in the field of nano-foils. The governing equations were solved using a Finite Volume Methodology (FVM). The computational domain was discretized using a uniform Cartesian grid with the appropriate mesh size along the x and y directions employing the corresponding number of grid points. The field variables were discretized at the cell centres and the spatial, as well as the time, derivatives were approximated using the second-order accurate numerical scheme. The time-evolution of the temperature and concentration fields, as well as the atomic diffusion coefficient, will be presented for the appropriate Al-Au nano-foil geometry and boundary conditions.
PB  - Institute of Metals and Technology
T2  - Materiali in Tehnologije
T1  - CFD analysis of exothermic reactions in al-au nano multi-layered foils
VL  - 45
IS  - 4
SP  - 335
EP  - 338
UR  - https://hdl.handle.net/21.15107/rcub_smile_1642
ER  - 

@article{
author = "Raić, Karlo T. and Rudolf, Rebeka and Ternik, Primoz and Zunić, Zoran and Lazić, Vojkan and Stamenković, Dragoslav and Tanasković, Tatjana and Anžel, Ivan",
year = "2011",
abstract = "This work presents the possibility of numerical modelling using Computational Fluid Dynamics (CFD) in the field of nano-foils. The governing equations were solved using a Finite Volume Methodology (FVM). The computational domain was discretized using a uniform Cartesian grid with the appropriate mesh size along the x and y directions employing the corresponding number of grid points. The field variables were discretized at the cell centres and the spatial, as well as the time, derivatives were approximated using the second-order accurate numerical scheme. The time-evolution of the temperature and concentration fields, as well as the atomic diffusion coefficient, will be presented for the appropriate Al-Au nano-foil geometry and boundary conditions.",
publisher = "Institute of Metals and Technology",
journal = "Materiali in Tehnologije",
title = "CFD analysis of exothermic reactions in al-au nano multi-layered foils",
volume = "45",
number = "4",
pages = "335-338",
url = "https://hdl.handle.net/21.15107/rcub_smile_1642"
}

Raić, K. T., Rudolf, R., Ternik, P., Zunić, Z., Lazić, V., Stamenković, D., Tanasković, T.,& Anžel, I.. (2011). CFD analysis of exothermic reactions in al-au nano multi-layered foils. in Materiali in Tehnologije
Institute of Metals and Technology., 45(4), 335-338.
https://hdl.handle.net/21.15107/rcub_smile_1642

Raić KT, Rudolf R, Ternik P, Zunić Z, Lazić V, Stamenković D, Tanasković T, Anžel I. CFD analysis of exothermic reactions in al-au nano multi-layered foils. in Materiali in Tehnologije. 2011;45(4):335-338.
https://hdl.handle.net/21.15107/rcub_smile_1642 .

Raić, Karlo T., Rudolf, Rebeka, Ternik, Primoz, Zunić, Zoran, Lazić, Vojkan, Stamenković, Dragoslav, Tanasković, Tatjana, Anžel, Ivan, "CFD analysis of exothermic reactions in al-au nano multi-layered foils" in Materiali in Tehnologije, 45, no. 4 (2011):335-338,
https://hdl.handle.net/21.15107/rcub_smile_1642 .

TY  - JOUR
AU  - Rudolf, Rebeka
AU  - Anžel, Ivan
AU  - Gusel, L.
AU  - Stamenković, D.
AU  - Todorović, A.
AU  - Čolić, Miodrag
PY  - 2010
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1579
AB  - Microstructures of two high noble experimental Au-Pt alloys were compared before and after conditioning for biocompatibility, in order to identify phases and microelements responsible for the alloys' corrosive behaviour. Microstructural characterization was carried-out by optical and scanning electron microscopy, in addition to energy dispersive X-ray analysis. X-ray diffraction was applied to determine the phases' composition and their contribution in the alloys. Additionally, simultaneous thermal analysis was used to identify the temperatures of phase transformations. An overall assessment before conditioning showed that Au-Pt I is a two-phase alloy containing a dominant Au-rich alpha(1) phase and a minor Pt-rich alpha(2) phase, while the Au-Pt II alloy contains in addition three minor phases: AuZn3, Pt3Zn and Au1.4Zn0.52. The highest content of Zn (up to 6.76 wt.%) was detected in the Pt3Zn phase. After RPMI cell culture medium conditioning, the Pt3Zn and AuZn3 phases disappeared, suggesting that they are predominantly responsible for Zn loss and the lower corrosive stability of the Au-Pt II alloy.
PB  - Korean Inst Metals Materials, Seoul
T2  - Metals & Materials International
T1  - Microstructural analyses of two high noble gold-platinum alloys before and after conditioning in a cell culture medium
VL  - 16
IS  - 6
SP  - 931
EP  - 940
DO  - 10.1007/s12540-010-1211-4
ER  - 

@article{
author = "Rudolf, Rebeka and Anžel, Ivan and Gusel, L. and Stamenković, D. and Todorović, A. and Čolić, Miodrag",
year = "2010",
abstract = "Microstructures of two high noble experimental Au-Pt alloys were compared before and after conditioning for biocompatibility, in order to identify phases and microelements responsible for the alloys' corrosive behaviour. Microstructural characterization was carried-out by optical and scanning electron microscopy, in addition to energy dispersive X-ray analysis. X-ray diffraction was applied to determine the phases' composition and their contribution in the alloys. Additionally, simultaneous thermal analysis was used to identify the temperatures of phase transformations. An overall assessment before conditioning showed that Au-Pt I is a two-phase alloy containing a dominant Au-rich alpha(1) phase and a minor Pt-rich alpha(2) phase, while the Au-Pt II alloy contains in addition three minor phases: AuZn3, Pt3Zn and Au1.4Zn0.52. The highest content of Zn (up to 6.76 wt.%) was detected in the Pt3Zn phase. After RPMI cell culture medium conditioning, the Pt3Zn and AuZn3 phases disappeared, suggesting that they are predominantly responsible for Zn loss and the lower corrosive stability of the Au-Pt II alloy.",
publisher = "Korean Inst Metals Materials, Seoul",
journal = "Metals & Materials International",
title = "Microstructural analyses of two high noble gold-platinum alloys before and after conditioning in a cell culture medium",
volume = "16",
number = "6",
pages = "931-940",
doi = "10.1007/s12540-010-1211-4"
}

Rudolf, R., Anžel, I., Gusel, L., Stamenković, D., Todorović, A.,& Čolić, M.. (2010). Microstructural analyses of two high noble gold-platinum alloys before and after conditioning in a cell culture medium. in Metals & Materials International
Korean Inst Metals Materials, Seoul., 16(6), 931-940.
https://doi.org/10.1007/s12540-010-1211-4

Rudolf R, Anžel I, Gusel L, Stamenković D, Todorović A, Čolić M. Microstructural analyses of two high noble gold-platinum alloys before and after conditioning in a cell culture medium. in Metals & Materials International. 2010;16(6):931-940.
doi:10.1007/s12540-010-1211-4 .

Rudolf, Rebeka, Anžel, Ivan, Gusel, L., Stamenković, D., Todorović, A., Čolić, Miodrag, "Microstructural analyses of two high noble gold-platinum alloys before and after conditioning in a cell culture medium" in Metals & Materials International, 16, no. 6 (2010):931-940,
https://doi.org/10.1007/s12540-010-1211-4 . .

TY  - JOUR
AU  - Raić, Karlo T.
AU  - Rudolf, Rebeka
AU  - Kosec, Borut
AU  - Anžel, Ivan
AU  - Lazić, Vojkan
AU  - Todorović, Aleksandar
PY  - 2010
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1560
AB  - This paper describes the development of novel, reactive Al-Au nano-multilayered foils, their possible application in different fields and a discussion of the nano-foils' suitability for dental and jewellery applications. Moreover, this study includes the rapid joining of similar and dissimilar materials, by placing multilayer nano-foils and two layers of solder or braze. The foils precisely control the instantaneous release of heat energy for the joining and act as a controllable local heat source. The reactive foils' thickness is in the range 10 nm to less than 100 nm and they contain many nanoscale layers that alternate between materials with high mixing heats, such as Al and Au. The foil between the two solder/braze layers melts the solder/braze with the heat generated by the reaction and bonds the components. The use of reactive foils eliminates the need for a furnace and dramatically increases the soldering/brazing heating rate of the components being bonded. Thus, ceramics and metals can be fused over required areas without the thermal stresses that are encountered in furnace soldering or brazing. In addition, a completely new plasma technology is proposed for the manufacturing of nano-foils and the first results of the preliminary experimental testing are presented.
PB  - Institute of Metals and Technology
T2  - Materiali in Tehnologije
T1  - Nanofoils for soldering and brazing in dental joining practice and jewellery manufacturing
VL  - 43
IS  - 1
SP  - 3
EP  - 9
UR  - https://hdl.handle.net/21.15107/rcub_smile_1560
ER  - 

@article{
author = "Raić, Karlo T. and Rudolf, Rebeka and Kosec, Borut and Anžel, Ivan and Lazić, Vojkan and Todorović, Aleksandar",
year = "2010",
abstract = "This paper describes the development of novel, reactive Al-Au nano-multilayered foils, their possible application in different fields and a discussion of the nano-foils' suitability for dental and jewellery applications. Moreover, this study includes the rapid joining of similar and dissimilar materials, by placing multilayer nano-foils and two layers of solder or braze. The foils precisely control the instantaneous release of heat energy for the joining and act as a controllable local heat source. The reactive foils' thickness is in the range 10 nm to less than 100 nm and they contain many nanoscale layers that alternate between materials with high mixing heats, such as Al and Au. The foil between the two solder/braze layers melts the solder/braze with the heat generated by the reaction and bonds the components. The use of reactive foils eliminates the need for a furnace and dramatically increases the soldering/brazing heating rate of the components being bonded. Thus, ceramics and metals can be fused over required areas without the thermal stresses that are encountered in furnace soldering or brazing. In addition, a completely new plasma technology is proposed for the manufacturing of nano-foils and the first results of the preliminary experimental testing are presented.",
publisher = "Institute of Metals and Technology",
journal = "Materiali in Tehnologije",
title = "Nanofoils for soldering and brazing in dental joining practice and jewellery manufacturing",
volume = "43",
number = "1",
pages = "3-9",
url = "https://hdl.handle.net/21.15107/rcub_smile_1560"
}

Raić, K. T., Rudolf, R., Kosec, B., Anžel, I., Lazić, V.,& Todorović, A.. (2010). Nanofoils for soldering and brazing in dental joining practice and jewellery manufacturing. in Materiali in Tehnologije
Institute of Metals and Technology., 43(1), 3-9.
https://hdl.handle.net/21.15107/rcub_smile_1560

Raić KT, Rudolf R, Kosec B, Anžel I, Lazić V, Todorović A. Nanofoils for soldering and brazing in dental joining practice and jewellery manufacturing. in Materiali in Tehnologije. 2010;43(1):3-9.
https://hdl.handle.net/21.15107/rcub_smile_1560 .

Raić, Karlo T., Rudolf, Rebeka, Kosec, Borut, Anžel, Ivan, Lazić, Vojkan, Todorović, Aleksandar, "Nanofoils for soldering and brazing in dental joining practice and jewellery manufacturing" in Materiali in Tehnologije, 43, no. 1 (2010):3-9,
https://hdl.handle.net/21.15107/rcub_smile_1560 .

TY  - JOUR
AU  - Čolić, Miodrag
AU  - Rudolf, Rebeka
AU  - Stamenković, Dragoslav
AU  - Anžel, Ivan
AU  - Vucević, Dragana
AU  - Jenko, Monika
AU  - Lazić, Vojkan
AU  - Lojen, Gorazd
PY  - 2010
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1553
AB  - Cu-Al-Ni shape memory alloys (SMAs) have been investigated as materials for medical devices, but their biomedical application is still limited. The aim of this work was to compare the microstructure, corrosion and cytotoxicity in vitro of a Cu-Al-Ni SMA. Rapidly solidified (RS) thin ribbons, manufactured via melt spinning, were used for the tests. The control alloy was a permanent mould casting of the same composition, but without shape memory effect. The results show that RS ribbons are significantly more resistant to corrosion compared with the control alloy, as judged by the lesser release of Cu and Ni into the conditioning medium. These results correlate with the finding that RS ribbons were not cytotoxic to L929 mouse fibroblasts and rat thymocytes. In addition, the RS ribbon conditioning medium inhibited cellular proliferation and IL-2 production by activated rat splenocytes to a much lesser extent. The inhibitory effects were almost completely abolished by conditioning the RS ribbons in culture medium for 4 weeks. Microstructural analysis showed that RS ribbons are martensitic, with boron particles as a minor phase. In contrast, the control Cu-Al-Ni alloy had a complex multiphase microstructure. Examination of the alloy surfaces after conditioning by energy dispersive X-ray and Auger electron spectroscopy showed the formation of Cu and Al oxide layers and confirmed that the metals in RS ribbons are less susceptible to oxidation and corrosion compared with the control alloy. In conclusion, these results suggest that rapid solidification significantly improves the corrosion stability and biocompatibility in vitro of Cu-Al-Ni SMA ribbons.
PB  - Elsevier Sci Ltd, Oxford
T2  - Acta Biomaterialia
T1  - Relationship between microstructure, cytotoxicity and corrosion properties of a Cu-Al-Ni shape memory alloy
VL  - 6
IS  - 1
SP  - 308
EP  - 317
DO  - 10.1016/j.actbio.2009.06.027
ER  - 

@article{
author = "Čolić, Miodrag and Rudolf, Rebeka and Stamenković, Dragoslav and Anžel, Ivan and Vucević, Dragana and Jenko, Monika and Lazić, Vojkan and Lojen, Gorazd",
year = "2010",
abstract = "Cu-Al-Ni shape memory alloys (SMAs) have been investigated as materials for medical devices, but their biomedical application is still limited. The aim of this work was to compare the microstructure, corrosion and cytotoxicity in vitro of a Cu-Al-Ni SMA. Rapidly solidified (RS) thin ribbons, manufactured via melt spinning, were used for the tests. The control alloy was a permanent mould casting of the same composition, but without shape memory effect. The results show that RS ribbons are significantly more resistant to corrosion compared with the control alloy, as judged by the lesser release of Cu and Ni into the conditioning medium. These results correlate with the finding that RS ribbons were not cytotoxic to L929 mouse fibroblasts and rat thymocytes. In addition, the RS ribbon conditioning medium inhibited cellular proliferation and IL-2 production by activated rat splenocytes to a much lesser extent. The inhibitory effects were almost completely abolished by conditioning the RS ribbons in culture medium for 4 weeks. Microstructural analysis showed that RS ribbons are martensitic, with boron particles as a minor phase. In contrast, the control Cu-Al-Ni alloy had a complex multiphase microstructure. Examination of the alloy surfaces after conditioning by energy dispersive X-ray and Auger electron spectroscopy showed the formation of Cu and Al oxide layers and confirmed that the metals in RS ribbons are less susceptible to oxidation and corrosion compared with the control alloy. In conclusion, these results suggest that rapid solidification significantly improves the corrosion stability and biocompatibility in vitro of Cu-Al-Ni SMA ribbons.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Acta Biomaterialia",
title = "Relationship between microstructure, cytotoxicity and corrosion properties of a Cu-Al-Ni shape memory alloy",
volume = "6",
number = "1",
pages = "308-317",
doi = "10.1016/j.actbio.2009.06.027"
}

Čolić, M., Rudolf, R., Stamenković, D., Anžel, I., Vucević, D., Jenko, M., Lazić, V.,& Lojen, G.. (2010). Relationship between microstructure, cytotoxicity and corrosion properties of a Cu-Al-Ni shape memory alloy. in Acta Biomaterialia
Elsevier Sci Ltd, Oxford., 6(1), 308-317.
https://doi.org/10.1016/j.actbio.2009.06.027

Čolić M, Rudolf R, Stamenković D, Anžel I, Vucević D, Jenko M, Lazić V, Lojen G. Relationship between microstructure, cytotoxicity and corrosion properties of a Cu-Al-Ni shape memory alloy. in Acta Biomaterialia. 2010;6(1):308-317.
doi:10.1016/j.actbio.2009.06.027 .

Čolić, Miodrag, Rudolf, Rebeka, Stamenković, Dragoslav, Anžel, Ivan, Vucević, Dragana, Jenko, Monika, Lazić, Vojkan, Lojen, Gorazd, "Relationship between microstructure, cytotoxicity and corrosion properties of a Cu-Al-Ni shape memory alloy" in Acta Biomaterialia, 6, no. 1 (2010):308-317,
https://doi.org/10.1016/j.actbio.2009.06.027 . .

TY  - JOUR
AU  - Raić, Karlo T.
AU  - Rudolf, Rebeka
AU  - Todorović, Aleksandar
AU  - Stamenković, Dragoslav
AU  - Anžel, Ivan
PY  - 2010
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1534
AB  - Metal-ceramic fusing has been the essential step in obtaining materials that benefit from both ceramic and metal constituents. i e where the combined properties of metal and ceramic layers are desirable When considering fusing methods. soldering and active metal brazing are the most effective These processes involve braze melting and flowing between the two pieces of material In the first part the phenomena occurring on the boundary between the ceramics and the active filler metal during the metal-ceramics joining are discussed Three interconnected sub-processes are considered (1) wetting of the ceramic surface. (2) chemical reactions at the Interlace and (3) diffusion with a moving interface Then, the appearances at the grain boundary grooves of the ceramic surface are presented as phenomena on the catalytic surface In the second pan, examples from dental practice and jewellery manufacturing are used for comparative analysis Finally we discuss the composition and properties of the soldering and brazing alloys used for dental practice and jewellery manufacturing
PB  - Institute of Metals and Technology
T2  - Materiali in Tehnologije
T1  - Liquid metal/ceramic interfaces in dental practice and jewellery manufacturing
VL  - 44
IS  - 2
SP  - 59
EP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_smile_1534
ER  - 

@article{
author = "Raić, Karlo T. and Rudolf, Rebeka and Todorović, Aleksandar and Stamenković, Dragoslav and Anžel, Ivan",
year = "2010",
abstract = "Metal-ceramic fusing has been the essential step in obtaining materials that benefit from both ceramic and metal constituents. i e where the combined properties of metal and ceramic layers are desirable When considering fusing methods. soldering and active metal brazing are the most effective These processes involve braze melting and flowing between the two pieces of material In the first part the phenomena occurring on the boundary between the ceramics and the active filler metal during the metal-ceramics joining are discussed Three interconnected sub-processes are considered (1) wetting of the ceramic surface. (2) chemical reactions at the Interlace and (3) diffusion with a moving interface Then, the appearances at the grain boundary grooves of the ceramic surface are presented as phenomena on the catalytic surface In the second pan, examples from dental practice and jewellery manufacturing are used for comparative analysis Finally we discuss the composition and properties of the soldering and brazing alloys used for dental practice and jewellery manufacturing",
publisher = "Institute of Metals and Technology",
journal = "Materiali in Tehnologije",
title = "Liquid metal/ceramic interfaces in dental practice and jewellery manufacturing",
volume = "44",
number = "2",
pages = "59-66",
url = "https://hdl.handle.net/21.15107/rcub_smile_1534"
}

Raić, K. T., Rudolf, R., Todorović, A., Stamenković, D.,& Anžel, I.. (2010). Liquid metal/ceramic interfaces in dental practice and jewellery manufacturing. in Materiali in Tehnologije
Institute of Metals and Technology., 44(2), 59-66.
https://hdl.handle.net/21.15107/rcub_smile_1534

Raić KT, Rudolf R, Todorović A, Stamenković D, Anžel I. Liquid metal/ceramic interfaces in dental practice and jewellery manufacturing. in Materiali in Tehnologije. 2010;44(2):59-66.
https://hdl.handle.net/21.15107/rcub_smile_1534 .

Raić, Karlo T., Rudolf, Rebeka, Todorović, Aleksandar, Stamenković, Dragoslav, Anžel, Ivan, "Liquid metal/ceramic interfaces in dental practice and jewellery manufacturing" in Materiali in Tehnologije, 44, no. 2 (2010):59-66,
https://hdl.handle.net/21.15107/rcub_smile_1534 .

TY  - JOUR
AU  - Rudolf, Rebeka
AU  - Zupančič-Hartner, Tjaša
AU  - Kosec, L.
AU  - Todorović, A.
AU  - Kosec, Borut
AU  - Anžel, Ivan
PY  - 2008
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1440
AB  - Development of a dental alloy with high Au content is based on the ternary system of Au-Pt-Zn with a nominal composition of 86,9Au-9,9Pt-1,5Zn, and about 1,5 wt.% micro-alloying elements (in, Ir, Rh). The results analyses of different heat-treated states showed that the optimal mechanical properties and hardness of an Au-Pt-Zn alloy can be reached with combinations of heat treatment for 20 minutes at 723 K and then slowly cooling, if the alloy was annealed at 1223 K for 30 minutes and the water quenched. Research results confirmed that the microstructure of the Au-Pt-Zn alloy consists of two phases: alpha(1)-phase rich in Au (main phase) and alpha(2)-phase rich in Pt (minor phase). During XRD analysis and use of the Rietveld method, it was found that the alpha(1)-phase content is about 98,5 wt.% while the content of alpha(2)-phase is 1,5 wt.%. STA analyses show that the Au-Pt-Zn alloy has a solidus temperature of about 1292 K and a liquidus temperature of about 1412 K.
PB  - Croatian Metallurgical Society
T2  - Metalurgija
T1  - Mechanical properties and microstructure characterisation of Au-Pt dental alloy
VL  - 47
IS  - 4
SP  - 317
EP  - 323
UR  - https://hdl.handle.net/21.15107/rcub_smile_1440
ER  - 

@article{
author = "Rudolf, Rebeka and Zupančič-Hartner, Tjaša and Kosec, L. and Todorović, A. and Kosec, Borut and Anžel, Ivan",
year = "2008",
abstract = "Development of a dental alloy with high Au content is based on the ternary system of Au-Pt-Zn with a nominal composition of 86,9Au-9,9Pt-1,5Zn, and about 1,5 wt.% micro-alloying elements (in, Ir, Rh). The results analyses of different heat-treated states showed that the optimal mechanical properties and hardness of an Au-Pt-Zn alloy can be reached with combinations of heat treatment for 20 minutes at 723 K and then slowly cooling, if the alloy was annealed at 1223 K for 30 minutes and the water quenched. Research results confirmed that the microstructure of the Au-Pt-Zn alloy consists of two phases: alpha(1)-phase rich in Au (main phase) and alpha(2)-phase rich in Pt (minor phase). During XRD analysis and use of the Rietveld method, it was found that the alpha(1)-phase content is about 98,5 wt.% while the content of alpha(2)-phase is 1,5 wt.%. STA analyses show that the Au-Pt-Zn alloy has a solidus temperature of about 1292 K and a liquidus temperature of about 1412 K.",
publisher = "Croatian Metallurgical Society",
journal = "Metalurgija",
title = "Mechanical properties and microstructure characterisation of Au-Pt dental alloy",
volume = "47",
number = "4",
pages = "317-323",
url = "https://hdl.handle.net/21.15107/rcub_smile_1440"
}

Rudolf, R., Zupančič-Hartner, T., Kosec, L., Todorović, A., Kosec, B.,& Anžel, I.. (2008). Mechanical properties and microstructure characterisation of Au-Pt dental alloy. in Metalurgija
Croatian Metallurgical Society., 47(4), 317-323.
https://hdl.handle.net/21.15107/rcub_smile_1440

Rudolf R, Zupančič-Hartner T, Kosec L, Todorović A, Kosec B, Anžel I. Mechanical properties and microstructure characterisation of Au-Pt dental alloy. in Metalurgija. 2008;47(4):317-323.
https://hdl.handle.net/21.15107/rcub_smile_1440 .

Rudolf, Rebeka, Zupančič-Hartner, Tjaša, Kosec, L., Todorović, A., Kosec, Borut, Anžel, Ivan, "Mechanical properties and microstructure characterisation of Au-Pt dental alloy" in Metalurgija, 47, no. 4 (2008):317-323,
https://hdl.handle.net/21.15107/rcub_smile_1440 .

TY  - JOUR
AU  - Lazić, Vojkan
AU  - Stamenković, Dragoslav
AU  - Todorović, Aleksandar
AU  - Rudolf, Rebeka
AU  - Anžel, Ivan
PY  - 2008
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1402
AB  - The basis for developing a new dental alloy with high Au content is appropriate chemical composition and manufacturing technology. The demands which have to be met when developing a new dental alloy are linked with fulfilling the necessary requirements for making the alloy suitable for use in metal-ceramic restorations. Due to the stress generated by masticatory forces, alloys for dental restorations must have corresponding mechanical properties (yield strength, tensile strength, and elongation), hardness, the coefficient of thermal expansion (CTE), and biocompatibility. Namely dental alloy placed in an oral cavity reacts with the environment and deteriorates. New dental alloy with high Au content is based on the ternary system of Au-Pt-Zn with a nominal composition of 86.9Au-9.9Pt-1.5Zn, and about 1,5 wt.% micro-alloying elements (In, Ir, Rh). The dental alloy was melted and cast in a vacuum-induction melting furnace in Zlatarna Celje. The results analyses of different heat-treated states showed that the optimal mechanical properties and hardness of an Au-Pt-Zn alloy can be reached with combinations of heat treatment for 20 minutes at 723 K and then slowly cooling, if the alloy was annealed at 1223 K for 30 minutes and the water quenched. Research results confirmed that the microstructure of the Au-Pt-Zn alloy consists of two phases: a1-phase rich in Au (main phase) and a2-phase rich in Pt (minor phase). During XRD analysis and use of the Rietveld method, it was found that the a1-phase content is about 98,5 wt.% while the content of a2- phase is 1,5 wt.%. STA analyses show that the Au-Pt-Zn alloy has a solids temperature of about 1292 K and a liquids temperature of about 1412 K. The optical properties of Au-dental alloy were investigated by means of spectrophotometric colourimetry. Spectral reflectance data from the mirror-polished flat samples of initial Au dental alloy were collected under the CIE standard illuminant D65. Finally the test of cytotoxicity of new Au based dental alloys using standard in vitro assays for testing the biocompatibility with establishing new, more sensitive, in vitro tests on cell lines was done. According to the results of our research we can conclude that new dental alloy from Zlatarna Celje satisfied all requested standards regarding mechanical properties, hardness and CTE: Rp0.=550 [N/mm2], Rm =610 [N/mm2], A= 9%, 180 HV and CTE (25-600°C) about 14,45×10-6K-1. This new Au dental alloy has a yellow tinge in comparison to conventional Au-Pt-Zn alloys and did not show cytotoxicity when using standard short-term in-vitro assays on an L929 cell. .
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metalurgija
T1  - Investigation of mechanical and biomedical properties of new dental alloy with high content of Au
VL  - 14
IS  - 2
SP  - 121
EP  - 134
UR  - https://hdl.handle.net/21.15107/rcub_smile_1402
ER  - 

@article{
author = "Lazić, Vojkan and Stamenković, Dragoslav and Todorović, Aleksandar and Rudolf, Rebeka and Anžel, Ivan",
year = "2008",
abstract = "The basis for developing a new dental alloy with high Au content is appropriate chemical composition and manufacturing technology. The demands which have to be met when developing a new dental alloy are linked with fulfilling the necessary requirements for making the alloy suitable for use in metal-ceramic restorations. Due to the stress generated by masticatory forces, alloys for dental restorations must have corresponding mechanical properties (yield strength, tensile strength, and elongation), hardness, the coefficient of thermal expansion (CTE), and biocompatibility. Namely dental alloy placed in an oral cavity reacts with the environment and deteriorates. New dental alloy with high Au content is based on the ternary system of Au-Pt-Zn with a nominal composition of 86.9Au-9.9Pt-1.5Zn, and about 1,5 wt.% micro-alloying elements (In, Ir, Rh). The dental alloy was melted and cast in a vacuum-induction melting furnace in Zlatarna Celje. The results analyses of different heat-treated states showed that the optimal mechanical properties and hardness of an Au-Pt-Zn alloy can be reached with combinations of heat treatment for 20 minutes at 723 K and then slowly cooling, if the alloy was annealed at 1223 K for 30 minutes and the water quenched. Research results confirmed that the microstructure of the Au-Pt-Zn alloy consists of two phases: a1-phase rich in Au (main phase) and a2-phase rich in Pt (minor phase). During XRD analysis and use of the Rietveld method, it was found that the a1-phase content is about 98,5 wt.% while the content of a2- phase is 1,5 wt.%. STA analyses show that the Au-Pt-Zn alloy has a solids temperature of about 1292 K and a liquids temperature of about 1412 K. The optical properties of Au-dental alloy were investigated by means of spectrophotometric colourimetry. Spectral reflectance data from the mirror-polished flat samples of initial Au dental alloy were collected under the CIE standard illuminant D65. Finally the test of cytotoxicity of new Au based dental alloys using standard in vitro assays for testing the biocompatibility with establishing new, more sensitive, in vitro tests on cell lines was done. According to the results of our research we can conclude that new dental alloy from Zlatarna Celje satisfied all requested standards regarding mechanical properties, hardness and CTE: Rp0.=550 [N/mm2], Rm =610 [N/mm2], A= 9%, 180 HV and CTE (25-600°C) about 14,45×10-6K-1. This new Au dental alloy has a yellow tinge in comparison to conventional Au-Pt-Zn alloys and did not show cytotoxicity when using standard short-term in-vitro assays on an L929 cell. .",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metalurgija",
title = "Investigation of mechanical and biomedical properties of new dental alloy with high content of Au",
volume = "14",
number = "2",
pages = "121-134",
url = "https://hdl.handle.net/21.15107/rcub_smile_1402"
}

Lazić, V., Stamenković, D., Todorović, A., Rudolf, R.,& Anžel, I.. (2008). Investigation of mechanical and biomedical properties of new dental alloy with high content of Au. in Metalurgija
Savez inženjera metalurgije Srbije, Beograd., 14(2), 121-134.
https://hdl.handle.net/21.15107/rcub_smile_1402

Lazić V, Stamenković D, Todorović A, Rudolf R, Anžel I. Investigation of mechanical and biomedical properties of new dental alloy with high content of Au. in Metalurgija. 2008;14(2):121-134.
https://hdl.handle.net/21.15107/rcub_smile_1402 .

Lazić, Vojkan, Stamenković, Dragoslav, Todorović, Aleksandar, Rudolf, Rebeka, Anžel, Ivan, "Investigation of mechanical and biomedical properties of new dental alloy with high content of Au" in Metalurgija, 14, no. 2 (2008):121-134,
https://hdl.handle.net/21.15107/rcub_smile_1402 .

TY  - JOUR
AU  - Raić, Karlo T.
AU  - Rudolf, Rebeka
AU  - Anžel, Ivan
AU  - Todorović, Aleksandar
PY  - 2008
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1401
AB  - Over almost two decades metal-ceramic fusing has been the essential step in obtaining materials which benefit from both ceramic and metal materials, i.e. where the combined properties of the metal and ceramic layers are desirable. Soldering and active metal brazing are the most effective when considering fusing methods. This paper presents a low-temperature process for soldering and brazing ceramics to metals, which is based on the use of reactive multilayer foils as a local heat source. The reactive foils range in thickness from 40 μm to less than 100 μm and contain many nanoscale layers and/or domains that alternate between materials with high mixing heat. .
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metalurgija
T1  - Multilayered nano-foils for low-temperature metal-ceramic joining
VL  - 14
IS  - 2
SP  - 143
EP  - 154
UR  - https://hdl.handle.net/21.15107/rcub_smile_1401
ER  - 

@article{
author = "Raić, Karlo T. and Rudolf, Rebeka and Anžel, Ivan and Todorović, Aleksandar",
year = "2008",
abstract = "Over almost two decades metal-ceramic fusing has been the essential step in obtaining materials which benefit from both ceramic and metal materials, i.e. where the combined properties of the metal and ceramic layers are desirable. Soldering and active metal brazing are the most effective when considering fusing methods. This paper presents a low-temperature process for soldering and brazing ceramics to metals, which is based on the use of reactive multilayer foils as a local heat source. The reactive foils range in thickness from 40 μm to less than 100 μm and contain many nanoscale layers and/or domains that alternate between materials with high mixing heat. .",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metalurgija",
title = "Multilayered nano-foils for low-temperature metal-ceramic joining",
volume = "14",
number = "2",
pages = "143-154",
url = "https://hdl.handle.net/21.15107/rcub_smile_1401"
}

Raić, K. T., Rudolf, R., Anžel, I.,& Todorović, A.. (2008). Multilayered nano-foils for low-temperature metal-ceramic joining. in Metalurgija
Savez inženjera metalurgije Srbije, Beograd., 14(2), 143-154.
https://hdl.handle.net/21.15107/rcub_smile_1401

Raić KT, Rudolf R, Anžel I, Todorović A. Multilayered nano-foils for low-temperature metal-ceramic joining. in Metalurgija. 2008;14(2):143-154.
https://hdl.handle.net/21.15107/rcub_smile_1401 .

Raić, Karlo T., Rudolf, Rebeka, Anžel, Ivan, Todorović, Aleksandar, "Multilayered nano-foils for low-temperature metal-ceramic joining" in Metalurgija, 14, no. 2 (2008):143-154,
https://hdl.handle.net/21.15107/rcub_smile_1401 .

TY  - JOUR
AU  - Rudolf, Rebeka
AU  - Anžel, Ivan
AU  - Lazić, Vojkan
AU  - Stojić, D.
PY  - 2007
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/1341
AB  - The samples of the Cu-C composite were produced by two different techniques (i) the sintering of powders, and (ii) the internal carbonization of rapidly solidified pure copper. The aim of the present research was to produce a discontinuous Cu-C composite with the submicron dispersion of graphite particles. The results of our microstructural investigation show that the use of the mechanical alloying and sintering of consolidated powders is an inappropriate way to achieve a submicron dispersion of the graphite particles. On the other hand, the combination of rapid solidification and internal carbonization was found to be an efficient technique to obtain the requested microstructure.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metalurgija
T1  - The new approach of the production technique of discontinuous Cu-C composite
VL  - 13
IS  - 2
SP  - 107
EP  - 115
UR  - https://hdl.handle.net/21.15107/rcub_smile_1341
ER  - 

@article{
author = "Rudolf, Rebeka and Anžel, Ivan and Lazić, Vojkan and Stojić, D.",
year = "2007",
abstract = "The samples of the Cu-C composite were produced by two different techniques (i) the sintering of powders, and (ii) the internal carbonization of rapidly solidified pure copper. The aim of the present research was to produce a discontinuous Cu-C composite with the submicron dispersion of graphite particles. The results of our microstructural investigation show that the use of the mechanical alloying and sintering of consolidated powders is an inappropriate way to achieve a submicron dispersion of the graphite particles. On the other hand, the combination of rapid solidification and internal carbonization was found to be an efficient technique to obtain the requested microstructure.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metalurgija",
title = "The new approach of the production technique of discontinuous Cu-C composite",
volume = "13",
number = "2",
pages = "107-115",
url = "https://hdl.handle.net/21.15107/rcub_smile_1341"
}

Rudolf, R., Anžel, I., Lazić, V.,& Stojić, D.. (2007). The new approach of the production technique of discontinuous Cu-C composite. in Metalurgija
Savez inženjera metalurgije Srbije, Beograd., 13(2), 107-115.
https://hdl.handle.net/21.15107/rcub_smile_1341

Rudolf R, Anžel I, Lazić V, Stojić D. The new approach of the production technique of discontinuous Cu-C composite. in Metalurgija. 2007;13(2):107-115.
https://hdl.handle.net/21.15107/rcub_smile_1341 .

Rudolf, Rebeka, Anžel, Ivan, Lazić, Vojkan, Stojić, D., "The new approach of the production technique of discontinuous Cu-C composite" in Metalurgija, 13, no. 2 (2007):107-115,
https://hdl.handle.net/21.15107/rcub_smile_1341 .