纳米球形WS_2颗粒对PTFE基固体润滑粘结干膜的改性研究

Study on the PTFE-based Bonded Solid Lubrication Films Modified by Nano WS_2 Particles

在PTFE基膜系中加入适当比例的纳米球形WS2颗粒,获得了不同性能的固体润滑粘结干膜,通过对膜层显微硬度、膜层附着力以及摩擦学性能的测试,筛选出一种性能较优的膜系。结果表明:在PTFE基膜系中增加适当比例的纳米WS2球,可以有效地减小膜层的磨损率,提高膜层的耐磨损寿命;但是当纳米WS2球添加比例较高时,未能充分分散的纳米球团聚体可能增加膜系中的磨粒磨损效应,使得膜层的摩擦因数波动变大,膜层的磨损率也增大,从而降低膜层的耐磨损寿命。通过不同应力条件下的寿命试验,初步建立了该种膜系的摩擦寿命模型,可用于预测该膜层在使用条件下的寿命或开展加速寿命试验。

The PTFE-based bonded solid lubrication films with different performance were obtained through optimal addition of nano WS2 sphere particles.The microhardness,adhesive strength and tribological properties of WS2-modified PTFE films were investigated in order to obtain the targeted films with good performance.Results show that optimum addition of WS2 particles in the PTFE-based films could effectively decrease the wear rate and consequently improve the wear life of films.While higher content addition of WS2 ...