Influence of annealing on the structure of nanoporous oxide films on the surface of titanium‒aluminum powder alloy

被引：2

作者：

Stepanova K.V. ^{[1
]}

Yakovleva N.M. ^{[1
]}

Kokatev A.N. ^{[1
]}

Pettersson H. ^{[2
]}

机构：

[1] Petrozavodsk State University, Petrozavodsk

[2] Halmstad University, Halmstad

来源：

Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques | 2016年 / 10卷 / 5期

关键词：

annealing; anodization; crystallization; nanoporous oxide films; titanium‒aluminum powder alloy;

D O I：

10.1134/S102745101605013X

中图分类号：

学科分类号：

摘要：

Oxide films obtained during anodization of Ti‒40% Al sintered powder samples in fluorine-containing electrolytes are investigated. With scanning electron microscopy and X-ray phase analysis, it is demonstrated that an X-ray amorphous nanoporous anodic oxide film is formed on the surface of the powder microparticles under optimal anodization conditions. After annealing at T = 1093 K in air and vacuum (10‒2 Pa), the oxide films are revealed to crystallize with its regular porous structure retained. The composition of the polycrystalline anodic-oxide films annealed in air is a mixture involving TiO2 (anatase and rutile) and α- and γ-Al2O3 phases and Ti2O3 and Al2TiO5 traces. The vacuum annealing process makes it possible to identify TiO2, in which anatase is the main phase, α- and γ-Al2O3, and Ti2O3 and TiO traces. However, rutile is not revealed. The presented results indicate that the application of the anodic nanostructuring of Ti‒40% Al powders is promising for the obtainment of new photocatalytic active nanomaterials. © 2016, Pleiades Publishing, Ltd.

引用

页码：933 / 941

页数：8

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