中文摘要：

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%（质量）TiO2纤维/PEEK复合材料的耐磨性能是相同含量nano-TiO2增强PEEK复合材料的3.28～7.63倍。

英文摘要：

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.