中文摘要：

在新型近β钛合金Ti-3Zr-2Sn-3Mo-25Nb表面分别用3种微弧氧化法（普通微弧氧化、复相微弧氧化、紫外照射微弧氧化）和优化溶胶-凝胶法镀上一层TiO2薄膜,考察了各种薄膜的表面微观结构、与基体的结合强度以及亲水性和抗腐蚀性能。XRD和SEM测试结果表明,3种微弧氧化膜主要由金红石相和锐钛矿相组成,表面布满微孔,普通微弧氧化法和紫外光照射微弧氧化法制备的薄膜表面较为光滑,与基体的结合强度为53 MPa,略高于复相微弧氧化膜;溶胶-凝胶膜主要由锐钛矿组成,表面最为光滑致密,与基体的结合强度为32 MPa。接触角测试结果表明,紫外光照射微弧氧化膜的表面亲水性最好,溶胶-凝胶膜的亲水性要好于普通微弧氧化膜和复相微弧氧化膜;电化学腐蚀试验显示,4种TiO2薄膜都具有较好的抗腐蚀性能,而普通微弧氧化膜的抗腐蚀能力最好。

英文摘要：

Titanium dioxide films were prepared by means of three kinds of micro-arc oxidation methods（common micro-arc oxidation,complex phase micro-arc oxidation,UV irradiation micro-arc oxidation）and optimized sol-gel method on the surface of TLM（Ti-3Zr-2Sn-3Mo-25Nb）alloy.The surface microstructure,bonding strength between films and TLM substrate,hydrophilicity and corrosion resistances of the four kinds of oxidation films were investigated.The results of XRD and SEM show that the three kinds of micro-arc oxidation films mainly consist of anatase and rutile,and micromoles distribute on the whole surface.The surface of films that prepared by means of common micro-arc oxidation and UV irradiation micro-arc oxidation method is smoother,and the interfacial bonding strength is 53 MPa,which is a little higher than that of complex phase micro-arc oxidated films.The sol-gel film,mainly consists of anatase is the smoothest and tightest,and the interfacial bonding strength is 32 MPa.The results of contact angle test showed that the hydrophilicity of the UV irradiation micro-arc film is the best,and the sol-gel film is better than the common microarc oxidation film and complex phase microarc oxidation film.The results of electro-chemical corrosion test showed that all the oxidation films have a good anticorrosion property,and the common micro-arc oxidation film is the best.