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Title: Investigation on the formation of nanoporous layers on TiNb alloys by ultrafast anodization
Authors: Hu, F
Zhao, C
Wen, SY
Xiong, W
Keywords: Fluoride-free
Nanoporous array
Rapid anodization
TiNb alloy
Issue Date: 2015
Publisher: 中国学术期刊(光盘版)电子杂志社
Source: 功能材料 (Journal of functional materials), 2015, v. 46, no. 8, p. 08013-08017 How to cite?
Journal: 功能材料 (Journal of functional materials) 
Abstract: Self-organized, through-hole, and ordered nano-porous array layers were fabricated by anodizing Ti-xNb (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 TiNb 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.
ISSN: 1001-9731
DOI: 10.3969/j.issn.1001-9731.2015.08.003
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