(中國礦業(yè)大學(xué) 機(jī)電與材料工程學(xué)院，徐州 221008)
摘 要: 采用熱擠壓方法制備了不同La2O3含量的尼龍1010(PA1010)復(fù)合材料。測定了復(fù)合材料的密度和硬度，在MM-200型環(huán)-塊試驗(yàn)機(jī)上考察了其摩擦磨損性能。用光學(xué)顯微鏡觀察了材料表面磨痕和轉(zhuǎn)移膜形貌。結(jié)果發(fā)現(xiàn)：La2O3能顯著改善PA1010的摩擦學(xué)性能，尤其是填充量為15%的PA1010復(fù)合材料減摩耐磨性能最佳，其摩擦系數(shù)從未填充的0.87降到0.33，磨損率降低近1個數(shù)量級。PA1010的磨損主要表現(xiàn)為嚴(yán)重犁削、粘著、疲勞和塑性變形，其轉(zhuǎn)移膜不均勻，且有脫落現(xiàn)象。 PA1010-15% La2O3復(fù)合材料的磨損主要表現(xiàn)為輕微犁削，其轉(zhuǎn)移膜薄而致密，且均勻光滑。這與二者的耐磨性能相一致。
關(guān)鍵字: 尼龍1010復(fù)合材料；稀土化合物； 摩擦磨損； 轉(zhuǎn)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
