高硅铝合金及其原位复合材料干滑动磨损性能与机制  

Wear Properties and Mechanism of Silumin and Its In-Situ Composites in Dry Sliding Wear

作　　者：霍晓阳[1] 赵玉涛[1] 陈刚[1] 孙洪强[1] 许可[1] 丁加善[1] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《铸造》2007年第4期375-379,共5页Foundry

基　　金：教育部重点基金项目(00170);江苏省铝基复合材料工程研究中心开发项目(BM2003014);江苏省材料摩擦学重点实验室开放基金(Kjsmcx06003)

摘　　要：采用熔体反应法制备了(Al2O3+Al3Zr)p/Al-22%Si原位复合材料。探讨了高硅铝合金及其原位复合材料的干滑动磨损行为,并对其磨损表面和亚表面形貌进行了观察和分析。试验结果表明:复合材料的磨损量显著低于同条件下高硅铝合金的磨损量,且随颗粒体积分数的增大,复合材料的磨损量减小。磨损表面亚表面的SEM观察分析表明:高硅铝合金磨损表面存在与亚表面相连的撕裂纹和宽大的犁沟,其磨损机制为粘着磨损加磨粒磨损的混合型磨损;复合材料的磨损表面亚表面平整光滑,主要表现为磨粒磨损。（Al2O3＋Al3Zr）p/Al-22% Si in-situ composites were fabricated by direct melt reaction method.The dry sliding wear behaviour of the silumin and its composites were investigated. The SEM morphology of wore surface and subsurface were also observed and analyzed. The results show that the wear mass loss of the （Al2O3＋Al3Zr）p/Al-22% Si composites is obviously less than that of the Al-22% Si alloy matrix under the same condition, and the wear mass loss of the （Al2O3＋Al3Zr）p/Al-22%Si composites decreases further with the increase of in-situ particles volume fraction ; The SEM analysis of worn surface and subsurface indicate that the tore crack connects to the subsurface and some furrows occur on the wear surface of Al-22% Si alloy. The wear mechanism of the matrix Al-22%Si alloy is adhesive and abrasive wear. While the wear surface and subsurface of （Al2O3＋Al3Zr）p/Al-22%Si composites are smooth and lubricity, the wear mechanism of （Al2O3＋Al3Zr）p/Al-22%Si composites is abrasive wear.

关 键 词：高硅铝 原位复合材料 干滑动磨损 磨损机制 

分 类 号：TG113[金属学及工艺—物理冶金]