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钙和锶对Mg_2Si/AZ91D复合材料组织和性能的影响
引用本文:徐云龙,陈刚,赵玉涛,徐萌,王军.钙和锶对Mg_2Si/AZ91D复合材料组织和性能的影响[J].机械工程材料,2009(11).
作者姓名:徐云龙  陈刚  赵玉涛  徐萌  王军
作者单位:江苏大学材料科学与工程学院;
基金项目:江苏省高技术研究项目(BG2007030); 江苏省高校自然科学重大基础研究项目(07KJA43008)
摘    要:将铝-硅合金加入到AZ91D镁合金中,制备了原位合成Mg2Si/AZ91D复合材料,并研究了添加钙和锶对于复合材料铸态组织和力学性能的影响。结果表明:硅的加入在AZ91D镁合金中生成了高熔点、高硬度的Mg2Si强化相,但尺寸较大;元素钙和锶的综合作用可以显著细化复合材料基体的铸态组织,同时还可以明显改善Mg2Si的形态和分布,提高复合材料的强度。

关 键 词:镁基复合材料  原位合成  显微组织  力学性能  

Effects of Calcium and Strontium on Microstructure and Properties of Mg_2Si/AZ91D Composites
XU Yun-long,CHEN Gang,ZHAO Yu-tao,XU Meng,WANG Jun.Effects of Calcium and Strontium on Microstructure and Properties of Mg_2Si/AZ91D Composites[J].Materials For Mechanical Engineering,2009(11).
Authors:XU Yun-long  CHEN Gang  ZHAO Yu-tao  XU Meng  WANG Jun
Affiliation:XU Yun-long,CHEN Gang,ZHAO Yu-tao,XU Meng,WANG Jun(School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China)
Abstract:In-situ formed Mg2Si/AZ91D composites were fabricated by adding Al-Si alloy into the AZ91D magnesium alloy.The effects of calcium and strontium on the as-cast microstructure and mechanical properties of composites were investigated.The results indicate that adding Si to AZ91D magnesium alloy could form Mg2Si strengthening phase of large size with high melting point and high hardness.The combined addition of calcium and strontium refined the as-cast microstructure of composites significantly,and also improve...
Keywords:magnesium matrix composite  in-situ synthesis  microstructure  mechanical property  
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