(上海交通大學(xué)金屬基復(fù)合材料國(guó)家重點(diǎn)實(shí)驗(yàn)室，上海 200030)
摘 要: 研究了Al2O3短纖維和SiC顆粒混雜增強(qiáng)鋁合金復(fù)合材料在制動(dòng)過(guò)程中的摩擦磨損性能。結(jié)果表明復(fù)合材料在制動(dòng)過(guò)程中的摩擦系數(shù)較穩(wěn)定，磨損量較小，與傳統(tǒng)的制動(dòng)材料鑄鐵相比，復(fù)合材料的表面溫升較低，鑄鐵由于表面溫升較高而產(chǎn)生了大量的裂紋。復(fù)合材料由于增強(qiáng)體的存在，制動(dòng)過(guò)程中表面易形成致密連續(xù)的轉(zhuǎn)移膜，該轉(zhuǎn)移膜的出現(xiàn)保證了復(fù)合材料在制動(dòng)過(guò)程中摩擦系數(shù)的穩(wěn)定，降低了復(fù)合材料的磨損量。與鑄鐵相比，復(fù)合材料的密度較低，更適用于作制動(dòng)材料。
關(guān)鍵字: Al2O3短纖維；SiC顆粒；復(fù)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
