骨科固定用镍钛形状记忆合金的摩擦磨损性能研究
Friction and Wear Behavior of NiTi Shape Memory Alloy Used for Orthopaedics Fixation
查看参考文献9篇
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文摘
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采用SRV摩擦磨损试验机考察了GCr15钢对常用骨科手术用固定材料--NiTi形状记忆合金在干摩擦及润滑油和人工关节液润滑下的摩擦磨损性能,同时考察了热处理对NiTi形状记忆合金摩擦磨损性能的影响;采用扫描电子显微镜观察NiTi形状记忆合金磨损表面形貌,并利用示差热分析(DSC)确定了NiTi合金的相变温度.结果表明:经过热处理的NiTi合金的形状记忆相变温度与人体体温接近,但热处理使NiTi合金的抗磨性能下降; NiTi合金在摩擦过程中受摩擦热的影响发生相转变,使其抗磨性能提高.相对于医用人工关节润滑液及其它润滑油而言,双酯作为GCr15/NiTi合金的润滑剂表现出更好的减摩和抗磨能力. |
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其他语种文摘
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An Optimol SRV oscillating friction and wear tester was performed to evaluate the friction andwear behavior of the commonly used fixation material in orthopaedics operation-NiTi shape memory alloy(SMA) paired with GCrl5 steel under dry sliding and lubrication by double ester, silicon oil, liquid paraffin, distilled water, and an artificial joint trophic liquid. The morphologies of the worn surfaces of the NiTi alloy lubricated with different lubricant systems were observed using a scanning electron microscope, while the elemental compositions of the heat-treated and untreated NiTi alloy were determined using an energy dispersive X-ray analyzer. Moreover, the hardness of the original and worn surfaces of the heat-treated NiTi alloy was measured as well, and the phase transformation temperature of the NiTi alloy was determined using a differential scanning calorimeter. As the results, the shape memory phase transformation temperature of the heat-treated SMA was close to the human body temperature, which is important to the application of the SMA in biological medicine. However, the wear resistance of the SMA was decreased to some extent after the heat-treatment. Moreover, the friction-induced heat was beneficial to speeding the phase transformation from martensite to austenite of the NiTi alloy, which contributed to increasing the hardness and wear resistance of the SMA. In addition, liquid lubrication condition for GCrl5/NiTi alloy contacts, the double ester as the lubricant was superior to the silicon oil, liquid paraffin, distilled water, and the artificial trophic liquid, in terms of the ability to reduce the friction and wear of the NiTi alloy sliding against GCrl5 steel. In other words, the tested double ester could find promising application as the lubricant for the NiTi memory alloy, but the artificial trophic liquid was not suitable for the lubrication of the steel/ NiTi alloy pair owing to its corrosiveness to the steel. |
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来源
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摩擦学学报
,2005,25(2):164-168 【核心库】
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关键词
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NiTi形状记忆合金
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人工关节液
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油润滑
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摩擦磨损性能
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地址
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中国科学院兰州化学物理研究所, 固体润滑国家重点实验室, 甘肃, 兰州, 730000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1004-0595 |
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学科
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机械、仪表工业 |
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基金
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国家自然科学基金资助项目
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文献收藏号
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CSCD:1925181
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