The analysis of the tribological properties of multiple strengthened nanocomposite of the Cu-Al2O3 system
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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. Th...e 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.
Keywords:
copper / Al2O3 / multiple strengthening / tribological propertiesSource:
Metalurgija - Journal of Metallurgy MЈoM, 2011, 17, 1, 49-55Publisher:
- Association of Metallurgical Engineers of Serbia AMES
Funding / projects:
- Dobijanje nanostrukturnih prahova u cilju proizvodnje novih disperzno ojačanih sinterovanih materijala u sistemu Cu-Al2O3 (RS-MESTD-MPN2006-2010-19032)
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Inovacioni centar / Innovation CentreTY - 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 .