Cu-Zn-Al2O3 nanocomposites:study of microstructure,corrosion,and wear properties |
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作者姓名: | Mohammad Baghani Mahmood Aliofkhazraei Mehdi Askari |
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作者单位: | Department of Materials Science, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran |
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摘 要: | Alumina nanoparticles were added to a Cu-Zn alloy to investigate their effect on the microstructural, tribological, and corrosion properties of the prepared alloys. Alloying was performed using a mixture of copper and zinc powders with 0vol% and 5vol% of α-Al nanopowder in a satellite ball mill. The results showed that the Cu-Zn solid solution formed after 18 h of mechanical alloying. The mechanically alloyed powder was compacted followed by sintering of the obtained green compacts at 750℃ for 30 min. Alumina nanoparticles were uniformly distributed in the matrix of the Cu-Zn alloy. The tribological properties were evaluated by pin-on-disk wear tests, which revealed that, upon the addition of alumina nanoparticles, the coefficient of friction and the wear rate were reduced to 20% and 40%, respectively. The corrosion properties of the samples exposed to a 3.5wt% NaCl solution were studied using the immersion and potentiodynamic polarization methods, which revealed that the addition of alumina nanoparticles reduced the corrosion current of the nanocomposite by 90%.
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关 键 词: | nanocomposites copper zinc alloys alumina microstructure corrosion wear properties |
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