ZnO纳米颗粒掺杂对镍钛合金表面微弧氧化膜层形貌及性能的影响  

Effects of Nano-ZnO Doping on Morphology and Properties of Micro-arc Oxidation Film on NiTi Alloy Surface

作　　者：李红梅 孟建兵[1,2] 于浩洋 董小娟 周海安[1] 战胜杰[1] 唐友泉 LI Hongmei;MENG Jianbing;YU Haoyang;DONG Xiaojuan;ZHOU Haian;ZHAN Shengjie;TANG Youquan(School of Mechanical Engineering,Shandong University of Technology,Zibo 255049,Shandong,China;Shandong Provincial Key Laboratory of Precision Manufacturing and Non-traditional Machining,Zibo 255049,Shandong,China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255049 [2]山东省精密制造与特种加工重点实验室,山东淄博255049

出　　处：《材料导报》2024年第13期185-191,共7页Materials Reports

基　　金：山东省自然科学基金(ZR2021ME159,ZR2021ME211)。

摘　　要：针对镍钛合金在体内复杂生理环境的作用下受到腐蚀而释放大量镍离子的问题,向以NaAlO_(2)、C_(10)H_(14)N_(2)Na_(2)O_(8)、Na_(2)HPO_(4)·12H_(2)O为主要成分的电解液中添加ZnO纳米颗粒,通过微弧氧化技术在镍钛合金表面制备耐腐蚀陶瓷氧化膜层。采用帕累托法则和正态分布曲线分析ZnO纳米颗粒对氧化膜层孔隙率和孔隙尺寸的作用,通过SEM、EDS、电化学工作站以及水滴接触角来研究颗粒掺杂对氧化膜层微观形貌、化学组分、耐腐蚀性及润湿性能的影响。结果表明:颗粒掺杂后的氧化膜层更加平整致密,孔隙率下降65.3%,孔径平均值从0.518μm降至0.321μm;随着ZnO纳米颗粒的加入,复合膜层的O、Al、Zn含量增加,Ni含量下降,阻抗模值上升,动电位极化曲线明显地向右上方偏移,自腐蚀电位上升32.4%,而电流密度下降一个数量级。In view of the problem that NiTi alloy is corroded and releases a large amount of nickel ions under the complex physiological environment in the body,ZnO nanoparticles were added to the electrolyte with NaAlO_(2),C_(10)H_(14)N_(2)Na_(2)O_(8)and Na_(2)HPO_(4)·12H_(2)O as the main components,a corrosion-resistant ceramic oxide film was fabricated on the surface of nickel titanium alloy using micro arc oxidation technology.Pareto’s law and normal distribution curve were introduced to analyze the effects of ZnO nanoparticles on the porosity and pore size of MAO film.Moreover,the effects of ZnO nanoparticles on the surface morphology,composition,phase structure,corrosion resistance and wettability of the film were investigated by SEM,EDS,electrochemical workstation,and water contact angle.The results show that MAO film doped with ZnO nanoparticles is more smooth and compact,the porosity decreases by 65.3%,the average pore size decreases from 0.518μm to 0.321μm.With the doping of nanoparticle ZnO,the amount of O,Al and Zn elements on the surface of the film increases,while the Ni element decreases.Furthermore,after doping,the surface resistance modulus of the composite film increases,the dynamic potential polarization curve shifts to the left,the self-corrosion potential increases by 32.4%,and the current density decreases by an order of magnitude.

关 键 词：镍钛合金 微弧氧化 ZnO颗粒掺杂 膜层形貌 耐蚀性能 

分 类 号：TG178[金属学及工艺—金属表面处理]