摘要
目的研究了DLC膜 /Ti6Al4V梯度材料与超高分子量聚乙烯 (UHMWPE)组成的摩擦副的生物摩擦学特性。方法采用面接触方式 ,摩擦试验采用OptimolSRV高温滑动摩擦磨损试验机并分别在干摩擦、Hank’s溶液和生理盐水润滑条件下进行 ,实时记录摩擦系数 ,并与同样条件下Ti6Al4V UHMW PE摩擦副的生物摩擦学特性作了对比。结果DLC梯度膜具有减摩效应 ,与Ti6Al4V相比 ,摩擦系数明显减小 ,在干摩擦、Hank’s溶液和生理盐水润滑条件下 ,摩擦系数分别降低了 2 4 %、5.0 %和 1 0 %。同时利用扫描电镜 (SEM)观察摩擦表面形貌并探讨了DLC膜的减摩机理。结论DLC膜 /Ti6Al4V梯度材料能够有效地降低摩擦系数 ,其减摩机理与DLC膜表面结构有关。DLC膜表面为光滑非晶态的硬碳膜 。
Objective To evaluate the friction property of diamond-like c ar bon(DLC) film/Ti6Al4V gradient material sliding against UHMWPE couple. Me thod Tests of this couple were made under dry sliding and lubrication of H ank’s solution and 0.9% NaCl solution respectively, and they were compared with the friction property of Ti6Al4V sliding against UHMWPE couple. The tests were performed on an SRV friction and wear tester by means of surface-contact and co efficients of friction were recorded real-time. Result DLC film could reduce the friction coefficient evidently. The coefficients of friction re duced 24%,5.0%,10% than these of Ti6Al4V under dry sliding and lubrication of Ha nk’s solution and 0.9% NaCl solution respectively. Mechanism of friction was al so studied by observing scanning electrical microscopy (SEM) morphology of frict ional surfaces. Conclusion Friction-reduction mechanism of DLC fil m/Ti6Al4V could be resulted from amorphous structure of DLC film which was smoot h and hard.
出处
《航天医学与医学工程》
CAS
CSCD
北大核心
2001年第4期282-285,共4页
Space Medicine & Medical Engineering
基金
国家自然科学基金资助项目 (3 9870 2 3 2 )
清华大学摩擦学国家重点实验室资助项目 (98 0 4)
