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超细晶纯钛材电化学抛光表面生物相容性研究
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江苏省高校自然基金重大项目(11KJA430004);江苏大学优秀学术青年骨干培养对象基金(1211110001)


Biocompatibility of Electrochemically Polished Surface of Ultrafine-Grained Titanium
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    摘要:

    研究了常规纯钛材和超细晶纯钛材电化学抛光表面的形貌、抗腐蚀性能、微动摩擦磨损性能和生物活性。结果表明:与常规纯钛材电化学抛光表面相比,超细晶纯钛材电化学抛光表面具有更多小尺寸(纳米尺度)蚀坑,更高的抗模拟体液电化学腐蚀性能(后者的腐蚀速率是前者的2/5),更低的摩擦系数0.12(vs. 0.15)、更高的耐磨性(后者的磨痕宽度是前者的4/5),以及较高的生物活性,模拟体液中Ca-P层的生长速率21.03 g/m2(vs. 18.40 g/m2)。分析认为,以上性能变化是纯钛材组织超细化提高其晶体缺陷(内能)所致。

    Abstract:

    The surface morphology, corrosion resistance, fretting friction, wear properties and bioactivity of electrochemically polished surface on conventional Ti and ultrafine-grained Ti were investigated. The results show that compared to the electrochemically polished surface of conventional Ti, the electrochemically polished surface of ultrafine-grained titanium has more nano-scale corrosion pits, higher corrosion resistance (corrosion rate of the latter is 2/5 of the former) in the Kokubo simulated body fluid, lower friction coefficient (0.12 vs. 0.15), higher wear resistance (wear scar width of the latter is 4/5 of the former), and a slightly higher bioactivity (growth rate of Ca-P layer in simulated body fluid about 21.03 vs. 18.40 g/m2). It is believed that the above mentioned improvements were caused by the increase of crystal defects (internal energy) due to ultrafine microstructure.

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许晓静,盛新兰,张体峰,刘 敏,牛小丫,朱利华.超细晶纯钛材电化学抛光表面生物相容性研究[J].稀有金属材料与工程,2013,42(10):2053~2056.[Xu Xiaojing, Sheng Xinlan, Zhang Tifeng, Liu Min, Niu Xiaoya, Zhu Lihua. Biocompatibility of Electrochemically Polished Surface of Ultrafine-Grained Titanium[J]. Rare Metal Materials and Engineering,2013,42(10):2053~2056.]
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  • 收稿日期:2012-10-15
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