Sol-gel titania coating on NiTi alloy with a porous titania film as interlayer

被引：23
作者：
Fu, T. [1 ,2 ]
Liu, B. G. [1 ]
Zhou, Y. M. [1 ]
Wu, X. M. [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Life Sci & Technol, Key Lab Biomed Informat Engn, Minist Educ, Xian 710049, Peoples R China
[2] Xiangtan Univ, Key Lab Low Dimens Mat & Applicat Technol, Minist Educ, Xiangtan 411105, Peoples R China
来源：
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2011年 / 58卷 / 01期
关键词：
NiTi alloy; Titania; Sol-gel; Corrosion resistance; Hydrophilicity; TIO2; FILM; ION-BEAM; CORROSION; BIOCOMPATIBILITY; PROPERTY;
D O I：
10.1007/s10971-010-2392-5
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Porous titania film is prepared by alkali treatment of NiTi alloy followed by soaking treatment in HCl solution. The benefit of this porous titania film as an interlayer to improve adhesion and integrity of the sol-gel titania coating on NiTi alloy substrate is evidenced by surface morphological observations. X-ray diffraction analyses indicate the formation of Ni4Ti3 phase in the matrix during heat treatment of the NiTi samples. X-ray photoelectron spectroscopy results indicate that the titania coating with two dip-coating layers has completely covered the NaOH-HCl treated NiTi substrate, and potentiodynamic polarization tests show that this titania coating provides good protection for the treated NiTi substrate in 0.9% NaCl solution. Ultraviolet illumination can increase surface hydrophilicity of the NiTi samples by reducing contact angles from 60-80A degrees to 20-10A degrees.
引用
收藏
页码：307 / 311
页数：5
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