中文摘要：

采用差示扫描量热分析法（DSC）研究热处理对Ti-52.2%Ni（摩尔分数）合金相变温度的影响。通过热处理手段可有效调整合金的相变温度。采用优化的溶胶-凝胶工艺在预氧化的TiNi合金表面制备一层致密、稳定的SiO2涂层,膜基结合强度为（65.9±1.5）N。电化学试验结果表明:经表面SiO2涂层改性处理的TiNi合金在模拟体液中具有优异的耐蚀性能。经表面SiO2涂层改性处理和无表面改性TiNi合金样品分别植入豚鼠听泡,通过扫描电镜观察和能谱分析发现TiNi合金表面致密稳定的SiO2涂层能有效阻止镍离子从合金基质中溶出。

英文摘要：

The effect of heat treatment on the transformation temperature of Ti?52.2%Ni (mole fraction) alloy was studied using differential scanning calorimetry (DSC). The transformation temperatures of the alloy can be adjusted effectively by heat treatment. Dense and stable SiO2 coatings were deposited on the surface of the pre-oxidized TiNi alloy by sol?gel method. The bonding strength of films and matrix was (65.9±1.5) N. The electrochemical corrosion test shows that the TiNi alloy with SiO2 coating has excellent corrosion resistance in the Hank’s simulated body fluid. The release behaviors of Ni ion of the alloy with and without SiO2 coating implanted in the acoustic vesicle of guinea pig were studied by EDS testing, which was inhibited effectively by the dense and stable SiO2 coating on the alloy.