热处理对Al_2O_(3f)/Mg-9Al-0.5Nd材料力学性能及摩擦磨损特性的影响

Influences of Heat Treatment on Properties,Friction and Wear Characteristics of Al_2O_(3f)/Mg-9Al-0.5Nd Composite

采用无压浸渗技术制备了Al2O3f/Mg-9Al-0.5Nd复合材料,研究了热处理对复合材料力学性能和摩擦磨损性能的影响,采用扫描电子显微镜观察磨损表面形貌并对其磨损机理进行了分析.结果表明:热处理后复合材料的硬度及耐磨性得到显著提高;铸态复合材料的磨损机制主要表现为磨粒磨损和剥层磨损,热处理后复合材料抗剥层能力增强,磨损机制主要为磨粒磨损.

Magnesium matrix composite （Al2O3f/Mg-9Al-0.5Nd） was fabricated by pressureless infiltration. The effects of heat treatment on mechanical properties,friction and wear properties of composite were studied. The morphology of worn surface and wear mechanism were explored by using SEM. The results showed that the hardness and the wear resistance of composite were greatly improved after heat treatment. For as cast composite the wear mechanism was abrasive wear and delamination wear. For heat treatted composite,the ability to reisist delamination wear was strengthened and the wear mechanism was characterized by abrasive wear.