Sol-gel preparation, corrosion resistance and hydrophilicity of Ta-containing TiO2 films on Ti6Al4V alloy

被引：12
作者：
Fu, Tao [1 ]
Sun, Jian-min [1 ]
Alajmi, Zafer [1 ]
Wu, Feng [2 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Life Sci & Technol, Minist Educ, Key Lab Biomed Informat Engn, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Med, Xian 710061, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2015年 / 25卷 / 02期
基金：
中国国家自然科学基金;
关键词：
titanium; TiO2; sol-gel; tantalum; corrosion; hydrophilicity; NITI ALLOY; THIN-FILMS; TANTALUM; TITANIUM; BEHAVIOR; BIOCOMPATIBILITY; COATINGS; BEAM;
D O I：
10.1016/S1003-6326(15)63626-3
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Ta-containing TiO2 films with Ta contents of 5%, 20%, 33% (mole fraction) were sol-gel coated on the surface roughened Ti6Al4V alloy by dip coating method for biomedical applications. The Ta-TiO2 films on 1.5 mol/L NaOH-HCl pretreated substrate are adherent, but there are cracks for the sample with 33% Ta. X-ray photoelectron spectroscopy results show that Ti and Ta exist as TiO2 and Ta2O5 in the film, and Al element is not detectable. X-ray diffraction and Raman scattering analyses reveal that the addition of Ta decreases crystallization of the films. Potentiodynamic polarization test in a Ca-free Hank's balanced solution demonstrates that the coating samples markedly improve the corrosion resistance compared with the polished sample. The addition of Ta impedes UV light-induced hydrophilic conversion of the coating samples. The sample with 20% Ta has enough film integrity and hydrophilic conversion rate, and is expected to possess good biological properties.
引用
收藏
页码：471 / 476
页数：6
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