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,随着处理时间的延长,γ-Al2O3的结晶度增加,膜层表面粗糙度增大,表面微孔数逐渐减少而孔径增大.经60 min微弧氧化处理后,镍钛合金在Hank's溶液中的自腐蚀电位比基体高142mV,自腐蚀电流密度降低了近2个数量级,耐蚀性有了大幅提高.
参考文献
| [1] | BRAILOVSKI V;TROCHU F .Review of shape memory alloys medical applications in Russia[J].Biomedical Materials & Engineering,1996,6(04):291-298. |
| [2] | Shabalovskaya SA .Surface, corrosion and biocompatibility aspects of Nitinol as an implant material.[J].Bio-medical materials and engineering,2002(1):69-109. |
| [3] | Firstov G;Vitchev R;Kumar H;Blanpain B;Van Humbeeck J .Surface oxidation of NiTi shape memory alloy.[J].Biomaterials,2002(24):4863-0. |
| [4] | CHENG F T;SHI P;MAN H C .Anatase coating on NiTi via a lowtemperature sol-gel route for improving corrosion resistance[J].Scripta Materialia,2004,51(11):1041-1045. |
| [5] | Man HC;Zhang S;Cheng FT;Guo X .In situ formation of a TiN/Ti metal matrix composite gradient coating on NiTi by laser cladding and nitriding[J].Surface & Coatings Technology,2006(16/17):4961-4966. |
| [6] | CHU P K .Plasma surface treatment of artificial orthopedic and caradiovascular biomaterials[J].Surface and Coatings Technology,2007,201(9/11):5601-5606. |
| [7] | F.T. Cheng;P. Shi;H.C. Man .Nature of oxide layer formed on NiTi by anodic oxidation in methanol[J].Materials Letters,2005(12):1516-1520. |
| [8] | A. L. Yerokhin;X. Nie;A. Leyland;A. Matthews;S. J. Dowey .Plasma electrolysis for surface engineering[J].Surface & Coatings Technology,1999(2/3):73-93. |
| [9] | Sul YT .The significance of the surface properties of oxidized titanium to the bone response: special emphasis on potential biochemical bonding of oxidized titanium implant.[J].Biomaterials,2003(22):3893-3907. |
| [10] | Shihai Cui;Jianmin Han;Yongping Du;Weijing Li .Corrosion resistance and wear resistance of plasma electrolytic oxidation coatings on metal matrix composites[J].Surface & Coatings Technology,2007(9/11):5306-5309. |
| [11] | K. Wu;Y.Q. Wang;M.Y. Zheng .Effects of microarc oxidation surface treatment on the mechanical properties of Mg alloy and Mg matrix composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(1/2):227-232. |
| [12] | L. Liu;Z. Liu;K.C. Chan .Surface modification and biocompatibility of Ni-free Zr-based bulk metallic glass[J].Scripta materialia,2008(3):231-234. |
| [13] | Jim Liang;Litian Hu;Jingcheng Hao .Preparation and characterization of oxide films containing crystalline TiO{sub}2 on magnesium alloy by plasma electrolytic oxidation[J].Electrochimica Acta,2007(14):4836-4840. |
| [14] | SUN X T;JIANG Z H;XIN S G et al.Composition and mechanical properties of hard ceramic coating containing α-Al2O3 produced by microare oxidation on Ti-6Al-4V alloy[J].THIN SOLID FILMS,2005,471(1/2):194-199. |
| [15] | Wever DJ;Veldhuizen AG;de-Vries J;Busscher HJ;Uges DR;van-Horn JR .Electrochemical and surface characterization of a nickel-titanium alloy.[J].Biomaterials,1998(7/9):761-769. |
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