干摩擦条件下Al_(18)B_4O_(33)晶须增强AC4C铝基复合材料的摩擦磨损特性  

Friction and Wear Properties of Al 18 B 4O 33 Whisker reinforced AC4C Al Alloy Matrix Composites under Dry Sliding Conditions

作　　者：涂江平[1] 孟亮 刘茂森[1] 松村昌信 

机构地区：[1]浙江大学材料科学与工程学系,浙江杭州310027 [2]广岛大学工学部化学工程系

出　　处：《摩擦学学报》2000年第1期1-5,共5页Tribology

基　　金：日本文部省科学研究会辅助金资助;日本振兴会(JSPS)基金

摘　　要：利用环-块磨损试验机,在干摩擦条件下研究了铸态与T6处理态Al18B4O33晶须增强AC4C铝基复合材料的摩擦磨损行为.结果表明:与铸态复合材料相比,T6处理态复合材料的耐磨性较差;晶须与基体间的界面化学反应影响复合材料的摩擦磨损特性,在本文试验载荷范围内,复合材料发生了由轻度磨损向严重磨损的转化;在高载荷下,除了产生擦伤和粘着,在表层和次表层发生的应变硬化还会导致界面开裂、晶须断裂和分离;在低载荷及低滑动速度下,速度增大导致磨损率和摩擦系数提高,随着滑动速度的进一步增大。The steady state friction and wear behavior of the as cast and T6 treated Al 18 B 4O 33 whisker reinforced AC4C Al composites was investigated with a block on ring apparatus under dry sliding conditions. The results indicate that the interfacial reaction between the whisker and the matrix influences the friction and wear of the composites. In the tested load range, all materials undergo a transition from mild wear to severe wear. Severe interfacial cracking and fracture and detachment of whisker occur due to the strain hardening of the surface and subsurface layer under the high load,accompanied by scuffing and adhesion. Compared with the as cast composite, T6 treated composite with reduced whisker hardness and strength and brittle and weak whisker matrix interface has relatively low wear resistance. Under low load and sliding speed,increasing in sliding speed induces an increase in wear rate and coefficient of friction. However,with further increasing in the sliding speed,the oxide film formed on the worn sufrace and the strain hardening of the surface layer contribute to decrease wear rate and coefficient of friction.

关 键 词：铝基 复合材料 摩擦 磨损 干摩擦 

分 类 号：TB333[一般工业技术—材料科学与工程] TH117.1[机械工程—机械设计及理论]