采用电化学测试的方法,研究了表面氧化以及表面氧化-离子注氮两种表面改性方式对NiTi形状记忆合金在人体生理模拟液(Hank′s 溶液)中腐蚀行为的影响.腐蚀电位和极化曲线的测量结果表明表面氧化-离子注氮的方法使NiTi合金材料的腐蚀电位正移,维钝电流密度下降,钝化电位区间扩大,合金表面耐蚀性明显提高.尤其是NiTi合金在进行氮离子注入后,测得击穿电位显著上升,增强了表面膜的抗局部腐蚀能力,因而表面氧化-离子注氮的改性方法可使材料的耐蚀性达到最佳.通过XPS的分析发现,离子注氮后合金表面形成氮化钛相以及富含羟基的化学效应,使NiTi基体的电化学性能得到提高.
参考文献
[1] | Takaurra K;Hayashi K;Ishinishi N et al.[J].Journal of Biomedical Materials Research,1994,28:583. |
[2] | Filip P;Tomasek T;Mazanee K .[J].Metallic Materials,1994,32(02):63. |
[3] | Rondelli G. .CORROSION RESISTANCE TESTS ON NITI SHAPE MEMORY ALLOY[J].Biomaterials,1996(20):2003-2008. |
[4] | Yang Mu-rong;Wu S K .[J].Surface and Coatings Technology,2000,127:274-281. |
[5] | 刘敬肖,杨大智,徐久军,陈吉华,蔡英骥.离子束合成TiO2薄膜对医用NiTi合金表面的改性[J].材料研究学报,2001(04):445-450. |
[6] | Wu S K;Chu C L;Lin H C .[J].Surface and Coatings Technology,1997,92:206-211. |
[7] | Mou Zhanqi;Liang Chenghao .[J].中国腐蚀与防护学报,1998,18(02):126-130. |
[8] | Trigwell S.;Nelson KF.;Selvaduray G.;Hayden RD. .Effects of surface treatment on the surface chemistry of NiTi alloy for biomedical applications[J].Surface and Interface Analysis: SIA: An International Journal Devoted to the Development and Application of Techniques for the Analysis of Surfaces, Interfaces and Thin Films,1998(7):483-489. |
[9] | Moulder J F.Handbook of X-Ray Photoelectron Spectroscopy[M].MN:Perkin-Elmer, Eden Prairie,1992 |
[10] | Ruan Shengping;Wu Fengqing;ZHANG Tong et al.[J].Materials Chemistry and Physics,2001,69:7-9. |
[11] | Bertoi I.[J].Surface and Coatings Technology,2002:151-152,194-203. |
[12] | Shabalovskaya SA.;Anderegg JW. .SURFACE SPECTROSCOPIC CHARACTERIZATION OF TINI NEARLY EQUIATOMIC SHAPE MEMORY ALLOYS FOR IMPLANTS[J].Journal of Vacuum Science & Technology, A. Vacuum, Surfaces, and Films,1995(5):2624-2632. |
[13] | Lu YM.;Hwang WS.;Yang JS. .Effects of substrate temperature on the resistivity of non-stoichiometric sputtered NiOx films[J].Surface & Coatings Technology,2002(2/3):231-235. |
[14] | Ascencio J A .[J].COMPUTATIONAL MATERIALS SCIENCE,2002,25:413-426. |
[15] | Hanawa T;Ota M .[J].Biomaterials,1991,12:767-774. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%