CuCrW(Al2O3) nanocomposite:mechanical alloying,microstructure, and tribological properties |
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作者姓名: | Mohammad Baghani Mahmood Aliofkhazraei |
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作者单位: | Department of Materials Science, Faculty of Engineering, Tarbiat Modares University, Tehran, Iran, P. O. Box:14115-143 |
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摘 要: | The effect of alumina nanoparticle addition on the microstructure and tribological properties of a CuCrW alloy was investigated in this work. Mechanical alloying was carried out in a satellite ball mill. The tribological properties of the samples were evaluated using pin-on-disk wear tests with different pins (alumina, tungsten carbide, and steel pins). The results indicated that the tungsten carbide pin had a lower coefficient of friction than the alumina and steel pins because of its high hardness and low surface roughness. In addition, when the sliding rate was decreased, the weight-loss rate increased. The existence of alumina nanoparticles in the nanocomposite led to a lower weight-loss rate and to a change in the wear mechanism from adhesive to abrasive.
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关 键 词: | wear mechanical alloying nanocomposite tribological properties metal matrix |
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