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超細(xì)晶純鈦材電化學(xué)拋光表面生物相容性研究
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江蘇省高校自然基金重大項(xiàng)目(11KJA430004)；江蘇大學(xué)優(yōu)秀學(xué)術(shù)青年骨干培養(yǎng)對象基金(1211110001)


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

    研究了常規(guī)純鈦材和超細(xì)晶純鈦材電化學(xué)拋光表面的形貌、抗腐蝕性能、微動摩擦磨損性能和生物活性。結(jié)果表明：與常規(guī)純鈦材電化學(xué)拋光表面相比，超細(xì)晶純鈦材電化學(xué)拋光表面具有更多小尺寸（納米尺度）蝕坑，更高的抗模擬體液電化學(xué)腐蝕性能（后者的腐蝕速率是前者的2/5），更低的摩擦系數(shù)0.12（vs. 0.15）、更高的耐磨性（后者的磨痕寬度是前者的4/5），以及較高的生物活性，模擬體液中Ca-P層的生長速率21.03 g/m2（vs. 18.40 g/m2）。分析認(rèn)為，以上性能變化是純鈦材組織超細(xì)化提高其晶體缺陷（內(nèi)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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許曉靜,盛新蘭,張?bào)w峰,劉 敏,牛小丫,朱利華.超細(xì)晶純鈦材電化學(xué)拋光表面生物相容性研究[J].稀有金屬材料與工程,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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