La_2O_3填充PA1010复合材料的摩擦磨损性能  

Friction and wear properties of PA1010 composites filled with La_2O_3

作　　者：熊党生[1] 陈磊[1] 王振中[1] 

机构地区：[1]中国矿业大学机电与材料工程学院,徐州221008

出　　处：《中国有色金属学报》2001年第4期611-615,共5页The Chinese Journal of Nonferrous Metals

基　　金：江苏省应用基础研究资助项目 (BJ2 0 0 0 0 30 )

摘　　要：采用热挤压方法制备了不同La2 O3含量的尼龙 10 10 (PA10 10 )复合材料。测定了复合材料的密度和硬度 ,在MM 2 0 0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 :La2 O3能显著改善PA10 10的摩擦学性能 ,尤其是填充量为 15 %的PA10 10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 .3 3 ,磨损率降低近 1个数量级。PA10 10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。PA10 10 15 %La2 O3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。PA1010 composites filled with La 2O 3 were prepared by hot squeeze method. The effects of content of La 2O 3 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 La 2O 3 can reduce the friction coefficient and wear rate of PA1010 significantly. When the content of La 2O 3 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%La 2O 3 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% La 2O 3 composite, the transfer films of PA1010 15% La 2O 3 composite on counterface are dense, smooth, thin and homogeneous. These conform to the wear resistance of PA1010 and PA1010 15% La 2O 3 composite.

关 键 词：尼龙1010复合材料 稀土化合物 摩擦 磨损 转移膜 三氧化二镧 

分 类 号：TB332[一般工业技术—材料科学与工程]