(中国矿业大学 机电与材料工程学院，徐州 221008)
摘 要: 采用热挤压方法制备了不同La2O3含量的尼龙1010(PA1010)复合材料。测定了复合材料的密度和硬度，在MM-200型环-块试验机上考察了其摩擦磨损性能。用光学显微镜观察了材料表面磨痕和转移膜形貌。结果发现：La2O3能显著改善PA1010的摩擦学性能，尤其是填充量为15%的PA1010复合材料减摩耐磨性能最佳，其摩擦系数从未填充的0.87降到0.33，磨损率降低近1个数量级。PA1010的磨损主要表现为严重犁削、粘着、疲劳和塑性变形，其转移膜不均匀，且有脱落现象。 PA1010-15% La2O3复合材料的磨损主要表现为轻微犁削，其转移膜薄而致密，且均匀光滑。这与二者的耐磨性能相一致。
关键字: 尼龙1010复合材料；稀土化合物； 摩擦磨损； 转移膜
PA1010 composites filled with La2O3
（College of Mechatronic and Materials Engineering,
China University of Mining and Technology, Xuzhou 221008, P.R.China）
Abstract: PA1010 composites filled with La2O3 were prepared by hot squeeze method. The effects of content of La2O3 on density and hardness of the composite were investigated. The friction and wear behaviors of the composites were examined on an MM-200 ring-on-block wear tester. The morphologies of worn surfaces and transfer films were examined with an optical microscope. It was found that La2O3 can reduce the friction coefficient and wear rate of PA1010 significantly. When the content of La2O3 in PA1010 increases from 0 to 15%, the friction coefficient decreases from 0.87 to 0.33, and the wear rate decreases by about 1 order of magnitude. The wear mechanisms of PA1010 and PA1010-15%La2O3 composites are different. The serious plowing, plastic deformation, adhesion and fatigue wear are dominant for PA1010, and the transfer films of PA1010 on the counterface are not homogeneous and have tears in the films. The slight plowing governs wear is dominant for PA1010-15% La2O3 composite, the transfer films of PA1010-15% La2O3 composite on counterface are dense, smooth, thin and homogeneous. These conform to the wear resistance of PA1010 and PA1010-15% La2O3 composite.
Key words: PA1010 composite; rare earth compound; friction and wear; transfer film
