钛铌锆锡合金经微弧氧化后的理化性能的研究

Physicochemical properties of Ti-24Nb-4Zr-7.9 Sn treated with micro-arc oxidation

目的:评价钛铌锆锡(TNZS)合金表面经微弧氧化(MAO)后的理化性能。方法:对钛铌锆锡合金试件表面进行微弧氧化处理,观察其表面形貌,分析膜层的相位和元素组成,检测膜层硬度、厚度、膜层以及基体的结合强度、表面能、表面粗糙度。结果:钛铌锆锡合金经微弧氧化处理可在其表面形成粗糙、多孔的氧化膜,氧化膜由Ti、O、Ca、P、Zr、Nb、Sn7种元素组成,金相结构主要为锐钛矿相的TiO2和金红石相TiO2,膜层硬度414HV,厚度26μm,结合力32N,表面能62.9mJ/m2,表面粗糙度1.175μm。结论:经微弧氧化处理的钛铌锆锡合金表面性能发生改变,表面形成粗糙、多孔、结合紧密并富含钙磷元素的氧化膜,可能有利于提高合金的生物学性能。

AIM ： To evaluate physicochemical properties of Ti - 24Nb - 4Zr - 7.9 Sn （ TNZS ） treated with micro - arc oxidation. METHODS： TNZS alloy was treated with micro - arc oxidation. The surface morphology was observed with SEM. The phase, elemental composition, microhardness, thickness, bonding force, surface energy and roughness of the film were characterized respectively. RESULTS： The surface was rough and multiporous, the film was composed of Ti, Nb, Zr, Sn, O, Ca and P elements. XRD indicated that the phases in the film were rutile and anatase phase TiO2. The feature of the film was 414HV hard and 26μm thick,with a bonding force of 32N ,62.9 mJ/ m2 surface energy and roughness of 1. 175μm. CONCLUSION： A rough, multiporous and tightly - bonding film is formed on the surface of TNZS by micro - arc oxidation , which would improve the biological performance of the alloy.