摘要：

研究了超细氧化钛纤维对PEEK摩擦磨损、耐热和结晶性能的影响，并与nano-TiO₂粒子增强PEEK作对比，探讨了相关作用机理。结果表明：与nano- TiO₂微粒相比，超细TiO₂纤维具有更强的显微补强、显微耐磨作用，填充超细TiO₂纤维的PEEK表现出更好的减摩耐磨特性和耐热性能。无论在较低载荷还是较高载荷下，超细TiO₂纤维/PEEK复合材料的摩擦系数和磨损率均低于nano- TiO₂/PEEK复合材料，且其磨损面、对偶面更加平整光滑。载荷200 N时，5%～10%

Abstract:

 The effects of superfine titania fibers on the properties of friction, wear rate, heat-resistance and crystallinity of polyether ether ketone (PEEK)were studied.For comparison, the properties of PEEK filled with nano-TiO₂ were also studied, and related mechanisms were discussed.Compared with nano- TiO₂, superfine titania fibers showed higher abilities in decreasing friction coefficient and improving wear resistance and heat-resistance of PEEK owing to its micro-reinforcing and wear resistance ability.Whether under lower loads or higher loads, superfine titania fibers reinforced PEEK composites showed lower friction coefficient and wear rate than those of nano-TiO₂/PEEK composites.Moreover, the worn surfaces and transfer films of titania fibers reinforced PEEK composites were more smooth and flat.Under 200 N, the wear resistances of 5%—10% titania fibers reinforced PEEK composites were 3.28—7.63 times higher than that of PEEK composites filled with the same content of nano-TiO₂.