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鎂犧牲陽(yáng)極法制備羥基磷灰石涂層的電化學(xué)性能
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Electrochemical Characteristics of the Hydroxyapatite Coatings Prepared by Mg Sacrificial Anode
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Supported by the National Science Foundation of China (50901025, 50771041, 50975060), State Key Lab of Advanced Metals Materials (2009ZD-06) and Program of Excellent Team in Harbin Institute of Technology

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    摘要:

    羥基磷灰石(HA)作為一種最重要的生物材料被成功采用鎂犧牲陽(yáng)極法在Ti6Al4V合金表面合成，以提高該復(fù)合材料的電化學(xué)抗腐蝕性能。使用電子能譜(EDX)、電子探針(EPMA)、傅里葉紅外變換圖譜(FTIR)和X射線衍射(XRD)對(duì)HA涂層進(jìn)行分析。結(jié)果表明，涂層主要由針狀羥基磷灰石晶體組成，Ca/P比為1.4063。浸泡30 d后，HA涂層在漢克氏溶液中晶體變大，在林格氏溶液和臺(tái)氏溶液中針狀晶體分別轉(zhuǎn)變?yōu)槠瑺詈椭鶢?。通過(guò)測(cè)試在3 種模擬體液和人血中的開(kāi)路電位、極化曲線和交流阻抗圖譜表明，有HA涂層的Ti6Al4V合金比未涂層的Ti6Al4V合金具有更好的電化學(xué)性能

    Abstract:

    The hydroxyapatite (HA) coating, one of the most important biomaterials, was prepared on Ti6Al4V alloy by Mg sacrificial anode to improve the anticorrosion electrochemical characteristics. Energy dispersive X-ray analysis (EDX), electron probe microanalyzer (EPMA), Fourier transform infrared spectra (FTIR) and X-ray diffraction (XRD) were used to analyze the HA coating. The results show that the HA coating is composed of needle-like hydroxyapatite crystals with the Ca/P ratio of 1.4063. After the immersion test of 30 d, the crystals become larger in Hank’s solution, from needle-like to sheet-like in Ringer’s solution and column-like in Tyrode’s solution. The tests of open circuit potential, polarizing curves and EIS method in Hank’s solution, Ringer’s solution, Tyrode’s solution and human blood show that the Ti6Al4V alloy with HA coating has better electrochemical characters than Ti6Al4V alloy

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吳 波,梁成浩,王 鵬.鎂犧牲陽(yáng)極法制備羥基磷灰石涂層的電化學(xué)性能[J].稀有金屬材料與工程,2010,39(12):2069~2074.[Wu Bo, Liang Chenghao, Wang Peng. Electrochemical Characteristics of the Hydroxyapatite Coatings Prepared by Mg Sacrificial Anode[J]. Rare Metal Materials and Engineering,2010,39(12):2069~2074.]
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  • 收稿日期:2009-12-28
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