超快阳极氧化TiNb合金制备复合纳米多孔氧化膜的研究  

Investigation on the formation of nanoporous layers on TiNb alloys by ultrafast anodization

作　　者：胡飞[1,2] 赵翀[1] 文思逸[1] 熊伟[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院,江西景德镇343001 [2]香港理工大学工业系统工程系

出　　处：《功能材料》2015年第8期8013-8017,共5页Journal of Functional Materials

基　　金：江西省青年科学家(井冈之星)培养对象计划资助项目(20112BCB23022);江西省科技厅对外合作资助项目(20133BDH80018)

摘　　要：以合金TiGxNb（x =30%-70%）为基底,硝酸为电解液,采用超快阳极氧化制备出了复合纳米多孔氧化膜.通过XRD、SEM 和TEM 等测试技术对所制备的复合纳米多孔氧化膜进行表征,发现氧化膜的表面孔径为10-30nm,膜背面的孔径为20-60nm,且纳米孔的孔间距随着Nb含量和电解液浓度的增加而增大.氧化膜的生长速度〉30μm/h.氧化薄膜的形成与硝酸的强氧化性活化了金属表面有关.氧化膜贯穿的原因可能是由于覆盖合金表面的纳米多孔氧化物薄膜产生的压应力和极化、浓度及温度梯度所产生的拉应力,两者之间的相互作用造成的氧化膜的自剥离.Self-organized,through-hole,and ordered nano-porous array layers were fabricated by anodizing Ti-x Nb( x =30%-70%) alloys in a nitric acid electrolyte rapidly and directly. The nanoporous layers are characterized by XRD,SEM and TEM. It was found that Ti Nb oxide nanoporous layers consist of straight and uniform pores of 10-30 nm in diameter,and the back side has uniform pores of 20-60 nm. The pore spacing increases with increasing Nb and nitric acid concentration. The growth rate of the oxidation layers is more than 30 μm / h. The formation of the layers is believed to be related to the strong oxidizability of nitric acid. And the penetration of the oxidation layers might be attributed to the interactions between the compressive stress by the layers and the tensile stress generated by the polarization,concentration and temperature gradient.

关 键 词：TiNb合金 快速阳极氧化 纳米孔阵列 无氟电解液 

分 类 号：TQ153.3[化学工程—电化学工业]