钛、钛铌涂层修饰对防止镍钛合金Ni^(2+)析出的影响  

Influence on Ni seperation from TiNi alloy by coating its surface with Ti or TiNb alloy

作　　者：李永滨[1] 孙明学[1] 卢世璧[1] 

机构地区：[1]解放军总医院骨科研究所,北京复兴路28号100853

出　　处：《中国矫形外科杂志》2006年第4期291-293,共3页Orthopedic Journal of China

基　　金：军队"十五"指令性课题(01L049)

摘　　要：[目的]探讨镍钛合金及表面钛、钛铌涂层修饰后对N i2+析出的影响。[方法]采用生理盐水浸泡试验,实验后的1~7 d采样,低温灰化炉灰化,以Mg(NO3)2为基体改进剂,石墨炉原子吸收法测定各组生理盐水中N i2+浓度。[结果]表面未经钛、钛铌涂层修饰的N iTi在37℃恒温箱中N i2+有明显析出,以前4 d为主,其吸出率(10-7μg.cm-2.s-1)分别为18.20、3.45、1.75和0.45,第5 d后N i2+无明显析出。经钛、钛铌修饰后N i2+无明显析出。该实验的样品回收率为94.6%~108.6%。[结论]钛、钛铌涂层修饰起到了防止N i2+析出作用。[ Objective] To investigate the influence of Nitinol modified on its surfaces by the coating of titanium or titaniumniobium alloy on separat ion of Ni^2＋. [ Method ] The specimens from 1 to 7 days after the experiments were collected and the concentration of Ni^2＋ were cletermined by physiologic saline immersing test, low temperature ashing furnace, Mg（ NO3 ）2 as matrix modifier and graphite furnace atomic absorption spectrometry （ GFAAS ）. [ Result ] Specimens of Nitinol were derided into 3 groups ： alloy coated with Ti （ Ti group ） ; alloy with Titanium-Niobium （ TiNi group） ; only Nitanol without coating group. Obvious separation of Ni^2＋ was detected in the groups of Nitinol that were not modified and were put in baking oven （37℃） ,the separating procedure was mainly within 4 days, the separation rate（ 10^- 7 . ·ug · cm^- 2 · s^-1 ） from the first to the forth days was 18. 2, 3.45, 1.75 and 0. 45 respectively, the Ni^2＋ was no more separated from the fifth day. Whereas, Ni^2＋ was not separated in the groups of Nitinol that were modified by the coating of metallic Ti and TiNb alloy. The recovery rate of the experiments was between 94. 6% - 108. 6%. [ Conclusion] The coating of Ti or TiNb on the surfaces of Nitinol stopped Nitinol from separating Ni^2 ＋.

关 键 词：镍钛合金 钛 钛铌 修饰 NI^2+ 析出 

分 类 号：R687.1[医药卫生—骨科学]