SiCp尺寸及含量对Al基复合材料磨损表层、亚表层形貌的影响

Influence of SiCp Size and Content on Wear Surface and Sub-surface of SiCp/Al Composites

分别以亚微米级 (130nm)、微米级 (14 μm)SiCp和微米级 (2 0 0目 )Al粉为原料 ,采用冷压烧结和热挤压方法制备出不同体积含量 (1 5 %、 5 % )亚微米、微米级SiCp增强Al基复合材料。研究复合材料磨损表面、亚表层形貌 ,结果表明 :SiCp/Al复合材料具有优良的耐磨性能 ,随着SiCp尺寸的增大 ,含量的增高 ,耐磨性能提高 ;其耐磨机理是磨损表面和亚表层在摩擦推挤形变的作用下形成了Al基体加尺寸适中、近球状。

The sliding wear-resistance, wear surface and sub-surface of sub-micrometer and micrometer of SiCp/Al matrix composites (1.5%, 5.0%) fabricated by powder metallurgy followed by hot extrusion were investigated. The results show that, with the increasing in SiCp size and volume, the wear-resistance was improved, a wear-resistance microstructure consisting of Al matrix and spherical, moderate size and homogeneous distribution SiCp is formed in the wear surface of SiCp/Al composites due to the plastic deformation resulting from friction and attrition.