On the modification of hypereutectic Al-Si alloys using rare earth Er

查看全文 作　　者：Pengfei [1]XING;Bo [1]GAO;Yanxin [2]ZHUANG;Kaihua [1]LIU;Ganfeng [1]TU

机构地区：[1]School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China;[2]Key Laboratory of Electromagnetic Processing of Materials, Northeastern University, Shenyang 110819, China

出　　处：《Acta Metallurgica Sinica(English Letters)》索引2010年第23卷第5期,共7页

基　　金：supported by the National Key Technology R&D Program of China(No.2009BAE80B00) 摘　　要：Hypereutectic Al-17.5Si (wt pct) and Al-25Si (wt pct) alloys with various content of rare earth Er were prepared by conventional casting technique. The effect of Er on the microstructure and properties of the hypereutectic Al-Si alloys was investigated using optical microscopy, scanning electron microscopy as well as friction and wear tests. It was found that optimal amount of Er exists in modifying the hypereutectic Al-Si alloys. An appropriate addition of Er improved the anti-wear properties, and reduced the friction coefficient of the hypereutectic Al-Si alloys studied. The primary silicon crystals in the hypereutectic Al-Si alloys were refined with the suitable addition of Er element. The modification mechanism was also discussed in this paper. 关键词：过共晶铝硅合金改性机理稀土摩擦磨损试验扫描电子显微镜重量百分比光学显微镜最佳添加量

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On the modification of hypereutectic Al-Si alloys using rare earth Er

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