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The analysis of the tribological properties of multiple strengthened nanocomposite of the Cu-Al2o3 system

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2011
6_Korac_MJoM_1701.pdf (234.0Kb)
Authors
Korać, Marija
Kamberović, Željko
Anđić, Zoran
Tasić, Miloš
Vujović, Aleksandar
Article (Published version)
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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 thermo-mechanically 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 significa...nt 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.

Keywords:
copper / Al2O3 / multiple strengthening / tribological properties
Source:
Metalurgija, 2011, 17, 1, 49-55
Publisher:
  • Savez inženjera metalurgije Srbije, Beograd

ISSN: 0354-6306

[ Google Scholar ]
URI
http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1830
Collections
  • Radovi istraživača / Researchers’ publications (TMF)
Institution/Community
Tehnološko-metalurški fakultet
TY  - JOUR
AU  - Korać, Marija
AU  - Kamberović, Željko
AU  - Anđić, Zoran
AU  - Tasić, Miloš
AU  - Vujović, Aleksandar
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1830
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 thermo-mechanically 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  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metalurgija
T1  - The analysis of the tribological properties of multiple strengthened nanocomposite of the Cu-Al2o3 system
EP  - 55
IS  - 1
SP  - 49
VL  - 17
UR  - conv_991
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 thermo-mechanically 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 = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metalurgija",
title = "The analysis of the tribological properties of multiple strengthened nanocomposite of the Cu-Al2o3 system",
pages = "55-49",
number = "1",
volume = "17",
url = "conv_991"
}
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
Savez inženjera metalurgije Srbije, Beograd., 17(1), 49-55.
conv_991
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. 2011;17(1):49-55.
conv_991 .
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, 17, no. 1 (2011):49-55,
conv_991 .

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