(上海交通大学金属基复合材料国家重点实验室，上海 200030)
摘 要: 研究了Al2O3短纤维和SiC颗粒混杂增强铝合金复合材料在制动过程中的摩擦磨损性能。结果表明复合材料在制动过程中的摩擦系数较稳定，磨损量较小，与传统的制动材料铸铁相比，复合材料的表面温升较低，铸铁由于表面温升较高而产生了大量的裂纹。复合材料由于增强体的存在，制动过程中表面易形成致密连续的转移膜，该转移膜的出现保证了复合材料在制动过程中摩擦系数的稳定，降低了复合材料的磨损量。与铸铁相比，复合材料的密度较低，更适用于作制动材料。
关键字: Al2O3短纤维；SiC颗粒；复合材料
（State Key Laboratory of Metal Matrix Composites,Shanghai Jiao Tong University, Shanghai 200030, P.R.China）
Abstract:Tribological properties and wear resistance of Al2O3 short fibre and SiC particles hybrid reinforced aluminum alloys matrix composites during braking were studied. The results show that the friction coefficient of composites is steady, and the wear amounts are small. Compared with the traditional braking materials such as cast iron, the increase in temperature of composites surface is low due to its good thermal conductivity , a lot of cracks emerge on the surface of cast iron due to its poor thermal conductivity. Owing to the fact that the reinforcements exist in the composites, the continuous and compacted transfer layer is easy to be produced on the surface of composites, the transfer layer makes contribution to the stability of friction coefficient of composites, decreases the wear amounts of composites. Compared with the cast iron, the composites are more suited to be used as braking materials due to its low density.
Key words: Al2O3 short fibre; SiC particle; composites
