TY  - JOUR
AU  - Korać, Marija
AU  - Kamberović, Željko
AU  - Anđić, Zoran
AU  - Tasić, Miloš
AU  - Vujović, Aleksandar
PY  - 2011
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5333
AB  - This paper presents the results of examined tribological properties of the multiple
strengthened nanocomposite Cu-Al2O3 system. Cu-Al2O3 composite powder was
obtained by combination of the thermo-chemical procedure and mechanical alloying,
which is a completely new approach to synthesis of these materials. The synthesized
powders were cold pressed with 940MPa and sintered in hydrogen atmosphere in
temperature range of 725-925oC during 15-120 minutes. The samples were thermomechanically
treated in two stages after sintering: cold rolling with the final reduction
degree of 30% and annealing at 800oC for 1h in hydrogen atmosphere. Characterization
of the sintered, rolled and annealed samples included the microstructural examination
by scanning electron microscopy (SEM), the quantitative analysis of the SEM
microphotographs and the examination on tribological properties. Tribological
examinations have shown that the best wear resistance have the samples after heat
treatment. The significant influence on the tribological properties has the effect of
multiple strengthening mechanisms. These mechanisms include strengthening of copper
matrix achieved by dispersion of fine particles of Al2O3, strengthening by the grain
boundaries due of the appearance of nanosized Al2O3 particles and the CuxAlyOz phase,
as well as by deformation strengthening and strengthening by annealing. Based on the
results of the quantitative analysis and tribological examinations, it can be concluded
that apart from these strengthening effects porosity also has a significant influence on the tribological properties, i.e. reduction of the volume share in porosity improves
tribological properties.
PB  - Association of Metallurgical Engineers of Serbia AMES
T2  - Metalurgija - Journal of Metallurgy MЈoM
T1  - The analysis of the tribological properties of multiple strengthened nanocomposite of the Cu-Al2O3 system
VL  - 17
IS  - 1
SP  - 49
EP  - 55
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5333
ER  - 

@article{
author = "Korać, Marija and Kamberović, Željko and Anđić, Zoran and Tasić, Miloš and Vujović, Aleksandar",
year = "2011",
abstract = "This paper presents the results of examined tribological properties of the multiple
strengthened nanocomposite Cu-Al2O3 system. Cu-Al2O3 composite powder was
obtained by combination of the thermo-chemical procedure and mechanical alloying,
which is a completely new approach to synthesis of these materials. The synthesized
powders were cold pressed with 940MPa and sintered in hydrogen atmosphere in
temperature range of 725-925oC during 15-120 minutes. The samples were thermomechanically
treated in two stages after sintering: cold rolling with the final reduction
degree of 30% and annealing at 800oC for 1h in hydrogen atmosphere. Characterization
of the sintered, rolled and annealed samples included the microstructural examination
by scanning electron microscopy (SEM), the quantitative analysis of the SEM
microphotographs and the examination on tribological properties. Tribological
examinations have shown that the best wear resistance have the samples after heat
treatment. The significant influence on the tribological properties has the effect of
multiple strengthening mechanisms. These mechanisms include strengthening of copper
matrix achieved by dispersion of fine particles of Al2O3, strengthening by the grain
boundaries due of the appearance of nanosized Al2O3 particles and the CuxAlyOz phase,
as well as by deformation strengthening and strengthening by annealing. Based on the
results of the quantitative analysis and tribological examinations, it can be concluded
that apart from these strengthening effects porosity also has a significant influence on the tribological properties, i.e. reduction of the volume share in porosity improves
tribological properties.",
publisher = "Association of Metallurgical Engineers of Serbia AMES",
journal = "Metalurgija - Journal of Metallurgy MЈoM",
title = "The analysis of the tribological properties of multiple strengthened nanocomposite of the Cu-Al2O3 system",
volume = "17",
number = "1",
pages = "49-55",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5333"
}

Korać, M., Kamberović, Ž., Anđić, Z., Tasić, M.,& Vujović, A.. (2011). The analysis of the tribological properties of multiple strengthened nanocomposite of the Cu-Al2O3 system. in Metalurgija - Journal of Metallurgy MЈoM
Association of Metallurgical Engineers of Serbia AMES., 17(1), 49-55.
https://hdl.handle.net/21.15107/rcub_cherry_5333

Korać M, Kamberović Ž, Anđić Z, Tasić M, Vujović A. The analysis of the tribological properties of multiple strengthened nanocomposite of the Cu-Al2O3 system. in Metalurgija - Journal of Metallurgy MЈoM. 2011;17(1):49-55.
https://hdl.handle.net/21.15107/rcub_cherry_5333 .

Korać, Marija, Kamberović, Željko, Anđić, Zoran, Tasić, Miloš, Vujović, Aleksandar, "The analysis of the tribological properties of multiple strengthened nanocomposite of the Cu-Al2O3 system" in Metalurgija - Journal of Metallurgy MЈoM, 17, no. 1 (2011):49-55,
https://hdl.handle.net/21.15107/rcub_cherry_5333 .

TY  - JOUR
AU  - Korać, Marija
AU  - Kamberović, Željko
AU  - Anđić, Zoran
AU  - Filipović, Mirjana
AU  - Tasić, Miloš
PY  - 2010
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5057
AB  - This paper presents the production of sintered materials from nano-composite
powders obtained by a novel synthesis method, which represents a combination of thermochemical
synthesis and mechanical alloying. Produced powders were characterized by an
average individual particle size of 30nm, with the presence of a small number of aggregates
with a size of 150nm. The positive effect on dispersion strengthening of the copper matrix
occurred up to 1 wt.% Al2O3, whereas a further increase of the Al2O3 content showed a
negative effect on hardness. The new synthesis method is more suiTab. for composite
materials containing maximum 1wt.% Al2O3. By this novel method it is possible to produce
composites possessing a good combination of hardness and electrical conductivity.
PB  - International Institute for the Science of Sintering
T2  - Science of Sintering
T1  - Sintered Materials Based on Copper and Alumina Powders Synthesized by a Novel Method
VL  - 42
SP  - 81
EP  - 90
DO  - doi: 10.2298/SOS1001081K
ER  - 

@article{
author = "Korać, Marija and Kamberović, Željko and Anđić, Zoran and Filipović, Mirjana and Tasić, Miloš",
year = "2010",
abstract = "This paper presents the production of sintered materials from nano-composite
powders obtained by a novel synthesis method, which represents a combination of thermochemical
synthesis and mechanical alloying. Produced powders were characterized by an
average individual particle size of 30nm, with the presence of a small number of aggregates
with a size of 150nm. The positive effect on dispersion strengthening of the copper matrix
occurred up to 1 wt.% Al2O3, whereas a further increase of the Al2O3 content showed a
negative effect on hardness. The new synthesis method is more suiTab. for composite
materials containing maximum 1wt.% Al2O3. By this novel method it is possible to produce
composites possessing a good combination of hardness and electrical conductivity.",
publisher = "International Institute for the Science of Sintering",
journal = "Science of Sintering",
title = "Sintered Materials Based on Copper and Alumina Powders Synthesized by a Novel Method",
volume = "42",
pages = "81-90",
doi = "doi: 10.2298/SOS1001081K"
}

Korać, M., Kamberović, Ž., Anđić, Z., Filipović, M.,& Tasić, M.. (2010). Sintered Materials Based on Copper and Alumina Powders Synthesized by a Novel Method. in Science of Sintering
International Institute for the Science of Sintering., 42, 81-90.
https://doi.org/doi: 10.2298/SOS1001081K

Korać M, Kamberović Ž, Anđić Z, Filipović M, Tasić M. Sintered Materials Based on Copper and Alumina Powders Synthesized by a Novel Method. in Science of Sintering. 2010;42:81-90.
doi:doi: 10.2298/SOS1001081K .

Korać, Marija, Kamberović, Željko, Anđić, Zoran, Filipović, Mirjana, Tasić, Miloš, "Sintered Materials Based on Copper and Alumina Powders Synthesized by a Novel Method" in Science of Sintering, 42 (2010):81-90,
https://doi.org/doi: 10.2298/SOS1001081K . .

TY  - JOUR
AU  - Tasić, Miloš
AU  - Anđić, Zoran
AU  - Vujović, Aleksandar
AU  - Jovanić, Predrag
PY  - 2010
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5082
AB  - Analyses of possibilities of monitoring the crystallization process of continuously cast special brass alloys with acoustic emission and for establishing a correlation between the microstructure and the recorded acoustic emission signals. With appropriate selection of parameters for gravitational casting process, continuous casting was performed and samples with a macrostructure typical of continuous casting were obtained. A laboratory plant for the simulation of the continuous casting and for the analysis of the crystallization process with acoustic emission was designed. Different energy levels in samples with different macrostructure, as well as in the defective and non-defective samples, were observed. Two types of sources of signals were defined: the signal during solidification of correct crystallization and macrostructure of continuous casting and acoustic
emission signal during solidification of samples in with flaws. To check the obtained results, after completion of the crystallization process, the samples were submitted to external with mechanical loading. The acoustic activity by loading is in accordance with the results of on-line monitoring of the crystallization process with acoustic emission. The results obtained show that it is possible to use the acoustic emission for monitoring the crystallization process by continuous and gravitational
casting.
PB  - Institute of Metals and Technology, Ljubljana, Slovenia
T2  - Materials and Technology
T1  - Analysis of the process crystallization of continuous cast special brass alloys with the acoustic emission method
VL  - 44
IS  - 6
SP  - 397
EP  - 401
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5082
ER  - 

@article{
author = "Tasić, Miloš and Anđić, Zoran and Vujović, Aleksandar and Jovanić, Predrag",
year = "2010",
abstract = "Analyses of possibilities of monitoring the crystallization process of continuously cast special brass alloys with acoustic emission and for establishing a correlation between the microstructure and the recorded acoustic emission signals. With appropriate selection of parameters for gravitational casting process, continuous casting was performed and samples with a macrostructure typical of continuous casting were obtained. A laboratory plant for the simulation of the continuous casting and for the analysis of the crystallization process with acoustic emission was designed. Different energy levels in samples with different macrostructure, as well as in the defective and non-defective samples, were observed. Two types of sources of signals were defined: the signal during solidification of correct crystallization and macrostructure of continuous casting and acoustic
emission signal during solidification of samples in with flaws. To check the obtained results, after completion of the crystallization process, the samples were submitted to external with mechanical loading. The acoustic activity by loading is in accordance with the results of on-line monitoring of the crystallization process with acoustic emission. The results obtained show that it is possible to use the acoustic emission for monitoring the crystallization process by continuous and gravitational
casting.",
publisher = "Institute of Metals and Technology, Ljubljana, Slovenia",
journal = "Materials and Technology",
title = "Analysis of the process crystallization of continuous cast special brass alloys with the acoustic emission method",
volume = "44",
number = "6",
pages = "397-401",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5082"
}

Tasić, M., Anđić, Z., Vujović, A.,& Jovanić, P.. (2010). Analysis of the process crystallization of continuous cast special brass alloys with the acoustic emission method. in Materials and Technology
Institute of Metals and Technology, Ljubljana, Slovenia., 44(6), 397-401.
https://hdl.handle.net/21.15107/rcub_cherry_5082

Tasić M, Anđić Z, Vujović A, Jovanić P. Analysis of the process crystallization of continuous cast special brass alloys with the acoustic emission method. in Materials and Technology. 2010;44(6):397-401.
https://hdl.handle.net/21.15107/rcub_cherry_5082 .

Tasić, Miloš, Anđić, Zoran, Vujović, Aleksandar, Jovanić, Predrag, "Analysis of the process crystallization of continuous cast special brass alloys with the acoustic emission method" in Materials and Technology, 44, no. 6 (2010):397-401,
https://hdl.handle.net/21.15107/rcub_cherry_5082 .

TY  - JOUR
AU  - Anđić, Zoran
AU  - Vujović, Aleksandar
AU  - Knežević, Marija
AU  - Vasiljević, Rade
AU  - Tasić, Miloš
PY  - 2009
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/5336
AB  - In the last couple of years the term ″nano-technology″ is very often used to
describe process technologies and analytical techniques used during synthesis of
materials in ultra fine range of magnitude of the millionth fraction of a millimeter.
Considering that they will have a significant impact on human activities in the 21st
century it is right to consider they represent a flywheel of the following industrial
revolution.
On the other side, an exceptional surface activity of nano-particles can cause
different effects, which do not always have a positive influence on work, as well as on
human environment.
An analysis of inter-relation of nano-technologies and human environment is
carried out in this paper taking into account the origin of particles, i.e. the route of their
processing. The influence of nano-technologies on internal environment, i.e. work
surroundings is analyzed from the aspect of safety and health at work. Apart from that, a
particular attention is paid to prevent nano-particles releasing, whereas a survey of the
developed techniques of nano-particles separation is presented.
PB  - Association of Metallurgical Engineers of Serbia AMES
T2  - Metalurgija - Journal of Metallurgy MЈoM
T1  - Nano-technologies from the aspect of human environment and safety and health at work
VL  - 15
IS  - 4
SP  - 219
EP  - 229
UR  - https://hdl.handle.net/21.15107/rcub_cherry_5336
ER  - 

@article{
author = "Anđić, Zoran and Vujović, Aleksandar and Knežević, Marija and Vasiljević, Rade and Tasić, Miloš",
year = "2009",
abstract = "In the last couple of years the term ″nano-technology″ is very often used to
describe process technologies and analytical techniques used during synthesis of
materials in ultra fine range of magnitude of the millionth fraction of a millimeter.
Considering that they will have a significant impact on human activities in the 21st
century it is right to consider they represent a flywheel of the following industrial
revolution.
On the other side, an exceptional surface activity of nano-particles can cause
different effects, which do not always have a positive influence on work, as well as on
human environment.
An analysis of inter-relation of nano-technologies and human environment is
carried out in this paper taking into account the origin of particles, i.e. the route of their
processing. The influence of nano-technologies on internal environment, i.e. work
surroundings is analyzed from the aspect of safety and health at work. Apart from that, a
particular attention is paid to prevent nano-particles releasing, whereas a survey of the
developed techniques of nano-particles separation is presented.",
publisher = "Association of Metallurgical Engineers of Serbia AMES",
journal = "Metalurgija - Journal of Metallurgy MЈoM",
title = "Nano-technologies from the aspect of human environment and safety and health at work",
volume = "15",
number = "4",
pages = "219-229",
url = "https://hdl.handle.net/21.15107/rcub_cherry_5336"
}

Anđić, Z., Vujović, A., Knežević, M., Vasiljević, R.,& Tasić, M.. (2009). Nano-technologies from the aspect of human environment and safety and health at work. in Metalurgija - Journal of Metallurgy MЈoM
Association of Metallurgical Engineers of Serbia AMES., 15(4), 219-229.
https://hdl.handle.net/21.15107/rcub_cherry_5336

Anđić Z, Vujović A, Knežević M, Vasiljević R, Tasić M. Nano-technologies from the aspect of human environment and safety and health at work. in Metalurgija - Journal of Metallurgy MЈoM. 2009;15(4):219-229.
https://hdl.handle.net/21.15107/rcub_cherry_5336 .

Anđić, Zoran, Vujović, Aleksandar, Knežević, Marija, Vasiljević, Rade, Tasić, Miloš, "Nano-technologies from the aspect of human environment and safety and health at work" in Metalurgija - Journal of Metallurgy MЈoM, 15, no. 4 (2009):219-229,
https://hdl.handle.net/21.15107/rcub_cherry_5336 .