超高分子量聚乙烯/氧化锆陶瓷耐磨性研究

Wear Resistance of Nano ZrO_2 Ceramic for Hip Joint Head Prostheses

利用环块式摩擦磨损试验机,测定了纳米Zr O2陶瓷试块与GCr15钢试环对磨的摩擦磨损性能,并与45#钢试块做了对比试验。在自制股骨头磨损试验装置上,做了纳米Zr O2陶瓷股骨头与超高分子量聚乙烯髋臼的对磨试验,并与Co-Cr-Mo合金股骨头做了对比试验。结果表明:Zr O2陶瓷与GCr15钢对磨的摩擦因数值比45#钢减少37.3%,其磨损量仅为45#钢磨损量的0.76%。与Zr O2陶瓷股骨头对磨的髋臼磨损量是与Co-Cr-Mo合金股骨头对磨的髋臼磨损量的61.5%。纳米Zr O2陶瓷具有良好的减摩耐磨特性,是制备人工髋关节股骨头假体的理想材料。

By use of the ring-block friction and wear machine, the friction and wear behavior of nano-ZrO_2 ceramic test block against GCr15 steel test ring has been studied. At the same time, friction and wear test of GCr15 steel ring against 45# steel block has also been conducted for comparison. By a self-made test machine for hip joint friction and wear, the friction test of nano- ZrO_2 ceramic hip joint head against ultra-high molecular mass polyethylene(UHMWPE) acetabulum has been done, and the friction test of ultra-high molecular mass polyethylene acetabulum against Co-Cr-Mo alloy hip joint head has also been made for comparison. The result shows that the friction factor of nano-ZrO_2 ceramic test block against GCr15 steel test ring is 37.3% less than that of GCr15 steel ring against 45# steel block, and the wear mass of nano-ZrO_2 ceramic test block against GCr15 steel test ring is only 0.76% of that of GCr15 steel ring against 45# steel block. The wear mass of nano-ZrO_2 ceramic hip joint head against ultra-high molecular mass polyethylene acetabulum is 61.5% of ultra-high molecular mass polyethylene acetabulum against Co-Cr-Mo alloy hip joint head. This indicates nano-ZrO_2 ceramic has good wear resistance property and is the ideal materials for artificial hip joint head prostheses.