热压法制备Zr基非晶颗粒增强聚苯硫醚复合材料的摩擦磨损性能

Preparation and tribological behavior of Zr based amorphous alloy particle reinforcing PPS composites by hot pressing

用氩气雾化法制备的Zr_(50)Cu_(40)Al_(10)非晶粉末作为填充材料,采用热压工艺制备非晶/聚苯硫醚(PPS)树脂复合材料,对材料的摩擦磨损性能进行检测,分析磨损机理,并与Al_2O_3颗粒作为填料的PPS树脂基复合材料进行对比。结果表明:以Zr_(50)Cu_(40)Al_(10)非晶颗粒作为填充物,可降低PPS的摩擦因数,减小磨损量,对于PPS树脂材料抗磨性能的提升效果优于传统无机填料Al_2O_3。随非晶颗粒含量(体积分数)从0增加到40%,复合材料的摩擦因数与磨损量均逐步降低而后略有增加,磨损机理则从粘着磨损过渡到磨粒磨损,最终转为疲劳磨损。30%Zr_(50)Cu_(40)Al_(10)/PPS复合材料的质量磨损仅为纯聚苯硫醚的20.4%。Zr_(50)Cu_(40)Al_(10)非晶颗粒与摩擦副发生化学反应,参与转移膜的形成,并提高转移膜与摩擦副的结合强度,减少摩擦副表面的微凸体,从而降低摩擦副对复合材料基体的磨损。

ZrsoCu40Al10 amorphous alloy powders, prepared by argon gas atomization, were used as fillers to fabricate polyphenylene sulfide （PPS） matrix composites by hot pressing method. The tribological behavior of the composite material was studied using friction tester. The wear mechanism was analyzed and compared with that of the Al2O3 filling PPS composites. As fillers, Zr50Cu40oAl10 amorphous alloy powders can reduce friction coefficient and rate of wear, performing better on improving the wear resistance of the composites than the traditional one. With increasing amorphous alloy powders from 0% to 40%, both the friction coefficient and wear loss drop gradually and then increase a little. The wear mechanism varies from adhesive wear to abrasive wear, and finally to fatigue wear. The wear loss of the 30% Zr50Cu40Al10/PPS composite is only about 20.4% of that of pure PPS. The Zr50Cu40Al10 amorphous alloy powders can react with the friction pair, facilitating the formation of transform film and improving the combination between friction pair and transform film. By reducing the surface roughness of the friction pair, the addition of Zr50Cu40Al10amorphous alloy powders can minimize the wear loss of the composite material.