快速凝固结合粉末冶金法制备SiCp/AZ91复合材料的组织及性能
Microstructure and Mechanical Properties of SiCp/AZ91 Composites Prepared by RS/PM Process
摘 要
用快速凝固结合粉末冶金法制备了SiC颗粒增强镁合金基复合材料(SiCp/AZ91)棒材,研究了SiC颗粒含量对复合材料室温力学性能及显微组织的影响.结果表明:制备的复合材料棒材中SiC颗粒在基体中分布均匀,但仍存在局部颗粒团聚现象;随SiC颗粒含量的增加,复合材料的屈服强度、抗拉强度和断后伸长率均逐渐降低;热挤压过程中,镁、SiC和SiO2之间发生了界面反应,在界面生成Mg2Si等脆性相,影响了复合材料的界面性能.
显微组织
力学性能
SiCp/AZ91 composite
microstructure
mechanical property
Abstract
SiCp/AZ91 composite bars were fabricated by rapid solidification/powder metallurgy(RS/PM) process.Effect of SiC content on the microstructure and mechanical properties of SiCp/AZ91 composites was investigated.The results show that the silicon carbide particulates(SiCp) were uniformly dispersed in the AZ91 magnesium alloy matrix,but agglomeration or clustering of the reinforcing SiC was observed at random intervals.The mechanical properties of the composites such as tensile strength,yield strength and elongation all degraded with the increase of SiC content.The Mg2Si appeared to originate on the surface of SiC and Mg matrix due to the reactions between the Mg,SiC and SiO2,which finally led to the early debonding between the reinforcement and the matrix.
中图分类号 TB333
所属栏目 新材料 新工艺
基金项目 教育部新世纪优秀人才支持计划资助项目(NCET-06-0701);教育部博士点基金资助项目(20070532087)
收稿日期 2008/1/14
修改稿日期 2008/6/4
网络出版日期
作者单位点击查看
备注赵青才(1981-),男,湖北荆州人,硕士研究生.
引用该论文: ZHAO Qing-cai,YAN Hong-ge,SHENG Shao-ding,CHEN Zhen-hua. Microstructure and Mechanical Properties of SiCp/AZ91 Composites Prepared by RS/PM Process[J]. Materials for mechancial engineering, 2009, 33(2): 39～42
赵青才,严红革,盛绍顶,陈振华. 快速凝固结合粉末冶金法制备SiCp/AZ91复合材料的组织及性能[J]. 机械工程材料, 2009, 33(2): 39～42
被引情况:
【1】盛绍顶,严红革,陈振华, "快速凝固结合粉末冶金法制备Al2O3颗粒增强AZ91镁基复合材料的组织与力学性能",机械工程材料 34, 40-42(2010)
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