镍钛合金的溶胶-凝胶法多孔TiO2薄膜表面改性（英文）

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Published in中国有色金属学报：英文版 Vol. 22; no. 7; pp. 1661 - 1666
Main Author 付涛 吴晓明 吴锋 罗孟 董兵辉 纪元
Format Journal Article
LanguageEnglish
Published 2012
Subjects
镍钛合金二氧化钛溶胶-凝胶法亲水性耐蚀性
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Bibliography:FU Tao1,2,WU Xiao-ming1,WU Feng3,L UO Meng1,DONG Bing-hui1,JI Yuan1 1.Key Laboratory of Biomedical Information Engineering of Ministry of Education,School of Life Science and Technology,Xi’an Jiaotong University,Xi’an 710049,China;2.State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China;3.College of Medicine,Xi’an Jiaotong University,Xi’an 710061,China
43-1239/TG
NiTi alloy;titania;sol？gel method;hydrophilicity;corrosion resistance
Titania films with nano-sized pores were prepared on the NaOH？HCl pretreated NiTi alloy substrate by sol？gel method.A crack-free film is obtained for the sample with a dense inner layer and a porous outside layer（sample TC1＋1）.The X-ray diffraction shows that the titania films are composed of anatase,and a little Ni4Ti3 phase in the heat treated substrate is also detected.The X-ray photoelectron spectroscopy results indicate that the titania film completely covered the NiTi substrate for sample TC1＋1.The sample TC1＋1 is hydrophilic with a contact angle about 20°,and UV illumination treatment for 15 min further decreases the contact angle to（9.2±3.2）°.The potentiodynamic polarization test in 0.9% NaCl solution reveals a better corrosion resistance of sample TC1＋1 than the polished NiTi sample.
ISSN:1003-6326