稀土Pr对Al_2O_3-SiO_2(sf)/ZL109复合材料组织及性能的影响  

Influence of Pr on the Microstructure and Wear and Tear Performance of Al_2O_3-SiO_2(sf)/ZL109 Composite

作　　者：黄鹰[1] 李文芳[1] 蒙继龙[1] 

机构地区：[1]华南理工大学机电系,广州510641

出　　处：《材料科学与工程》2002年第2期196-199,191,共5页Materials Science and Engineering

摘　　要：本文采用挤压浸渗法 ,制得不同稀土含量的硅酸铝短纤维增强铝基复合材料。用光学显微镜观察了复合材料的铸造显微组织 ,分析了稀土含量对共晶硅组织形态的影响 ;用扫描电镜对复合材料基体中的稀土相进行了观察 ,探索了稀土相的分布位置及其形态 ;并对不同稀土含量的复合材料进行了摩擦磨损实验 。Aluminosilicate(Al 2O 3·SiO 2)short fibre reinforced Al Si alloy composite with vary RE content was fabricated by means of squeeze casting.The casting microstructure of the composite was studied by optic microscope and the influence of RE content on the microcosmic appearance of eutectic Si was analyzed;The distributing position and microcosmic appearance of RE epsilon phase was observed and studied by SEM;To the composite with vary RE content,Wear and tear experiment has been taken,and the result shows that RE can improve the wearing performance of the composite.

关 键 词：AL2O3-SiO2(sf)/ZL109复合材料 组织 性能 稀土复合材料 硅酸铝短纤维 挤压浸渗 稀土相 磨擦磨损 铝基合金 

分 类 号：TB332[一般工业技术—材料科学与工程]