| 医用镍钛合金表面微弧氧化膜层的显微结构及耐蚀性 |
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| 引用本文： | 徐吉林,刘福,罗军明.医用镍钛合金表面微弧氧化膜层的显微结构及耐蚀性[J].电镀与涂饰,2011,30(12):41-44. |
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| 作者姓名： | 徐吉林 刘福 罗军明 |
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| 作者单位： | 1. 南昌航空大学材料科学与工程学院,江西南昌,330063
2. 哈尔滨工业大学材料学院,黑龙江哈尔滨,150001 |
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| 摘 要： | 采用由NaAlO2和NaH2PO2组成的电解液,以微弧氧化技术在医用镍钛合金表面制备Al2O3陶瓷膜层,以减少合金表面Ni含量,并进一步提高其耐腐蚀性能,使其具有良好的生物相容性.随微弧氧化过程中处理时间的延长,试样表面的游动火花由白色逐渐向橙色转变,火花数减少但尺寸增大.所得陶瓷膜层由γ-Al2O3晶相组成,随着处理...
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| 关 键 词： | 医用镍钛合金 微弧氧化 氧化铝膜层 耐蚀性 |
Microstructure and corrosion resistance of microarc oxidation coating on surface of biomedical nickeltitanium alloy |
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| XU Ji-lin,LIU Fu,LUO Jun-ming.Microstructure and corrosion resistance of microarc oxidation coating on surface of biomedical nickeltitanium alloy[J].Electroplating & Finishing,2011,30(12):41-44. |
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| Authors: | XU Ji-lin LIU Fu LUO Jun-ming |
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| Affiliation: | School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China |
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| Abstract: | An Al2O3 ceramic coating was prepared on the surface of biomedical titanium-nickel alloy by microarc oxidation in a NaAlO2-NaH2PO2 electrolyte.As the treatment time extends during microarc oxidation,the color of the moving spark on the sample surface changes from white to orange,and the number of spark decreases while its size increases.The obtained ceramic coating is composed of γ-Al2O3 crystal.As the treatment time extends,the crystallinity of γ-Al2O3 increases,the ceramic coating surface become rougher,and the micropore distributed on the surface of ceramic coating becomes less in number but larger in size.The corrosion potential of nickel-titanium alloy is increased by 142 mV and the corrosion current density of it in Hank’s solution decreased by 2 orders of magnitude after microarc oxidation for 60 min,indicating that the corrosion resistance of nickel-titanium alloy is improved markedly. |
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| Keywords: | biomedical titanium-nickel alloy microarc oxidation alumina coating corrosion resistance |
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