稀土化合物对PTFE基三层复合材料摩擦磨损性能的影响

Effect of Rare Earth Compounds on Friction and Wear Properties of PTFE Based Three-layer Composites

将混合稀土氧化物分别以粉末和卤化物溶液的方式添加到PTFE材料中,制备几种含铅和聚酰亚胺(PI)改性无铅PTFE基三层复合材料,考察稀土氧化物PTFE基三层复合材料摩擦磨损性能的影响,并分析稀土的作用机制。结果表明:在PTFE三层复合材料配方中掺杂稀土元素,可以明显提高复合材料各组分之间的界面结合性能,有利于减少摩擦过程中界面龟纹的产生,保持摩擦表面的光洁平整性;采用稀土卤化物溶液改性PTFE材料时,稀土元素在PTFE材料中分布更均匀,对PTFE材料的改性效果更明显。

Polytetrafluoroethylene（PTFE） based three-layer composites modified by lead and Polyimide （PI） were prepared by filling mixed rare earth oxides with powder and halide solution two ways. The effects of rare earth oxides on friction and wear properties of the lead and Polyimide （PI） modified lead-free three-layer composites were investigated, and the action mechanism of rare earth were analyzed. The results show that the interface bonding performance between each component of composites is significantly improved by doping rare earth elements into the formula of PTFE three-layer composites, the flaw on interface generated in the friction process is reduced and smooth friction surface is maintained. When using rare earth halide solution to modify PTFE three-layer composite materials,the rare earth elements are more uniformly distributed in the composite materials, and a more obvious improvement effect can be obtained.