陶瓷人工关节的跑合和摩擦性能研究

Investigation on the Running in and Friction Properties of Ceramic Ceramic Prostheses

研究３种生物陶瓷材料（氧化铝，氮化硅和碳化硅）在水中的跑合及其摩擦特性．结果表明：跑合前，氮化硅－氮化硅摩擦副的起始摩擦因数和稳态摩擦因数最高，碳化硅－碳化硅摩擦副的起始摩擦因数和稳态摩擦因数最低；跑合后，氧化铝－氧化铝摩擦副的稳态摩擦因数最高，碳化硅－碳化硅摩擦副的起始摩擦因数和稳态摩擦因数仍然最低．当摩擦副表面均加工到超光洁状态（表面粗糙度Ｒａ为纳米数量级）时，碳化硅－碳化硅摩擦副的摩擦性能最佳，氧化铝－氧化铝摩擦副的摩擦性能最差．从摩擦学角度来看，碳化硅－碳化硅与氮化硅－氮化硅摩擦副有望作为合用的人工髋关节材料得以应用．

In this paper, the author investigated the running in and friction properties of three ceramic materials in distilled water (including alumina, silicon nitride, and silicon carbide). The experimental results indicate that before running in, the start up and steady state friction factors of silicon nitride are the highest, that of silicon carbide are the lowest among the three ceramic materials. After running in, the steady state friction factor of alumina is the highest, that of silicon carbide is still the lowest among the three ceramic materials. When the surfaces of alumina, silicon nitride, and silicon carbide were polished to be ultra smooth (the surface roughness is a few nanometers), the friction property of silicon carbide in water is the best and that of alumina is the worst. From the tribological point of view, it is likely that silicon nitride silicon nitride and silicon carbide silicon carbide combinations are promising combinations for the total joint replacements.