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多孔NiTi合金直流-脈沖陽極氧化表面改性研究
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長(zhǎng)江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃資助（IRT0713）


Study on Surface Modification of Porous NiTi Alloys by Direct
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    摘要:

    采用低溫直流-脈沖陽極氧化技術(shù)對(duì)多孔NiTi合金表面進(jìn)行改性，分析直流-脈沖陽極氧化過程，利用XPS、SEM、動(dòng)電位極化對(duì)陽極氧化膜的組成、形貌以及耐腐蝕性進(jìn)行研究，觀察陽極氧化前后多孔NiTi合金在模擬人工體液中Ni離子釋放行為。研究結(jié)果表明在直流3 A、脈沖6 A下陽極氧化的多孔NiTi合金表面形成了一層均勻的多孔氧化膜，其厚度在190 nm左右，主要成分為Ti的氧化物，陽極氧化后多孔NiTi合金的耐腐蝕性顯著提高，其Ni離子釋放速率大幅度降低。

    Abstract:

    Surface of porous NiTi alloys was modified by direct current-pulse anodic oxidation technology at low temperature. The process of direct current-pulse anodic oxidation was analyzed. The phase composition, morphology and anti-corrosion behavior of the anodic oxidation film were studied by XPS, SEM and potentiodynamic polarization, respectively. The Ni release of porous NiTi alloys before and after anodic oxidation was investigated in simulated body fluid. The results show a uniform porous oxidation film with a thickness of about 190 nm on the surface of the porous NiTi alloy was obtained after anodic oxidation at direct current of 3 A and pulse current of 6 A. The oxidation film was mainly composed of the oxides of Ti. The corrosion resistance of porous NiTi alloys was obviously improved and the rate of Ni release was significantly reduced after anodic oxidation.

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李 強(qiáng),于景媛,孫旭東.多孔NiTi合金直流-脈沖陽極氧化表面改性研究[J].稀有金屬材料與工程,2010,39(7):1270~1274.[Li Qiang, Yu Jingyuan, Sun Xudong. Study on Surface Modification of Porous NiTi Alloys by Direct[J]. Rare Metal Materials and Engineering,2010,39(7):1270~1274.]
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  • 收稿日期:2009-11-15
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