采用微弧氧化法在纯钛及大变形纯钛表面制备多孔氧化膜层,研究微弧氧化膜层在干摩擦、模拟体液和小牛血清不同润滑介质条件下的生物摩擦学性能,探讨钛基材组织细化对其膜层表面摩擦磨损性能的影响。结果表明:与纯钛微弧氧化膜层相比,大变形纯钛微弧氧化膜层耐磨性能更优的原因在于钛基材晶粒的细化使得晶体缺陷增多,为微弧氧化膜层的形核提供了更多的能量,反应生成的Ti O_2膜层硬度更高,膜层表面更致密、均匀、光滑,提高了其摩擦磨损性能。大变形纯钛微弧氧化膜层在小牛血清润滑时的摩擦系数和磨损程度都低于干摩擦和模拟体液润滑条件下的摩擦系数与磨损程度。这归因于小牛血清在摩擦表面形成的化学反应膜及物理吸附膜,起到了更有效的润滑、冷却与承载作用。 The micro-arc oxidation method was used to prepare the porous oxide film on the surface of pure titanium and large deformed pure titanium to study the biological tribological properties of the micro-arc oxidation film under dry friction, simulated body fluid and different lubricating medium of bovine serum, Effect of Material Structure Refinement on the Friction and Wear Properties of Film Surfaces. The results show that compared with the pure titanium micro-arc oxidation coating, the wear resistance of the micro-arc oxidation coating with large deformation is better because the grain refinement of the titanium substrate increases the defects of the micro-arc oxidation coating Of the nucleation provides more energy, the reaction generated Ti O_2 film hardness higher, the film surface is more dense, uniform, smooth, improve its friction and wear properties. The coefficient of friction and the degree of abrasion of the micro-arc oxidation coating with large deformation on the surface of bovine serum were both lower than those under dry friction and simulated body fluid lubrication. This is due to the more effective lubrication, cooling and loading of the chemical reaction membrane and the physical adsorption membrane formed by the calf serum on the friction surface.