医用多孔NiTi合金表面微弧氧化改性研究

发布时间：2018-05-01 15:08

本文选题：多孔NiTi合金 + 微弧氧化　；参考：《材料科学与工艺》2015年03期

【摘要】：为解决多孔Ni Ti合金耐蚀性降低和Ni离子释放量增大而引起的使用安全性问题.本文采用微弧氧化技术对医用多孔Ni Ti合金进行表面改性处理,研究结果表明,微弧氧化处理并未改变多孔Ni Ti合金原有的孔隙结构和孔隙率,只在其外表面和孔隙内表面均形成了典型的微弧氧化多孔涂层.该涂层主要由氧化铝相组成,并含有少量的Ti和Ni元素,且外表面涂层的Ti和Ni含量要略低于孔隙内表面涂层.微弧氧化涂层提高了多孔Ni Ti合金的表面接触角,将原有的亲水表面转变成了疏水表面.经微弧处理后,多孔Ni Ti合金的耐蚀性较基体提高了1个数量级以上,Ni离子释放量也较基体降低了1个数量级以上.
[Abstract]:In order to solve the problem of safety caused by the decrease of corrosion resistance of porous Ni-Ti alloy and the increase of Ni ion release amount. In this paper, the surface modification of medical porous Ni-Ti alloy was carried out by micro-arc oxidation. The results showed that the micro-arc oxidation treatment did not change the original pore structure and porosity of porous Ni-Ti alloy. A typical micro-arc oxidation porous coating was formed only on the outer surface and the inner surface of the pore. The coating is mainly composed of alumina phase and contains a small amount of Ti and Ni, and the content of Ti and Ni on the outer surface coating is slightly lower than that on the inner porous surface coating. The surface contact angle of porous Ni-Ti alloy was improved by micro-arc oxidation coating, and the hydrophilic surface was transformed into hydrophobic surface. After microarc treatment, the corrosion resistance of porous Ni-Ti alloy is increased by more than one order of magnitude than that of matrix, and the release amount of Ni ion is also decreased by more than one order of magnitude compared with that of matrix.
【作者单位】：淮阴工学院江苏省介入医疗器械研究重点实验室;南昌航空大学材料科学与工程学院;
【基金】：国家自然科学基金(NO.51004051,51101085) 江苏省科技支撑计划(BE2011726) 江苏省介入医疗器械研究重点实验开放基金(jr1416)
【分类号】：TG174.4

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