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首页> 外文会议>European conference on biomaterials;ESB 2010 >Deep case hardening of titanium biomateriais by thermal oxidation and vacuum diffusion
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Deep case hardening of titanium biomateriais by thermal oxidation and vacuum diffusion

机译：通过热氧化和真空扩散对钛生物材料进行深层硬化

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Metal implants made of titanium (Ti) and/or Ti-alloys have a long tradition back to the 1950s when''production and processing of Ti moved to an industrial scale [1]. Similar to other refractory metals Ti exhibits an excellent biocompatibility. Despite not being a noble metal, Ti is extremely resistant to corrosion due to the formation of a passive TiO_2 layer on its surface. Further, mechanical strength and fatigue resistance are comparable to steel, making Ti and its alloys ideal candidates for joint and tooth replacements. However, the poor wear resistance of Ti-alloys has always been a major drawback for its use for permanent implants. Fretting of Ti and Ti-alloys against any other metal, polymer or ceramic counterparts causes the emission of participate wear debris which is believed to be the main cause of osteolysis and thus for aseptic implant loosening [2]. Furthermore, the protective passive layer is removed by the fretting motion giving rise to an accelerated tribo-corrosion of the implant.
机译：由钛（Ti）和/或钛合金制成的金属植入物具有悠久的历史，可追溯到1950年代，当时“钛的生产和加工已发展到工业规模[1]”。与其他难熔金属相似，Ti具有出色的生物相容性。尽管不是贵金属，但由于在其表面上形成钝化TiO_2层，所以Ti具有极强的抗腐蚀能力。此外，机械强度和抗疲劳性可与钢媲美，使Ti及其合金成为替代关节和牙齿的理想候选材料。然而，钛合金的耐磨性差一直是其用于永久性植入物的主要缺点。钛和钛合金对任何其他金属，聚合物或陶瓷对应物的微动都会散发参与磨损的碎屑，这被认为是造成骨溶解的主要原因，因此是无菌植入物松动的原因[2]。此外，通过微动运动去除了保护性无源层，从而导致了植入物的加速摩擦腐蚀。

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