In situ synthesis of nanostructured titania film on NiTi shape memory alloy by Fenton’s oxidation method

作     者：储成林 胡涛 S.L.Wu 王如萌 董寅生 林萍华 C.Y.Chung P.K.Chu 

作者机构：School of Materials Science and Engineering Southeast University Nanjing 211189 China Department of Physics and Materials Science City University ofHong Kong Hong Kong China 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2007年第17卷第5期

页      面：902-906页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Project supported by Program for New Century Excellent Talents(NCET) in University of Ministry of Education of China Project(50501007) supported by the National Natural Science Foundation of China Project(BK2007515) supported by the Natural Science Foundation of Jiangsu Province, China Project(7001999) supported by SRG Grant from the Research Committee of the CityU of HK 

主　　题：NiTi记忆合金 氧化反应 薄膜 腐蚀 

摘      要：Fenton’s oxidation method was successfully used to synthesize an ideal titania film in situ on NiTi shape memory alloy(SMA) for medical applications. Characterized with scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffractometry, inductively coupled plasma mass spectrometry and electrochemical tests, it is found that the titania film produced by Fenton’s oxidation method on NiTi SMA is nanostructured and has a Ni-free zone near its top surface, which results in a notable improvement in corrosion resistance and a remarkable decrease in leaching of harmful Ni ions from NiTi SMA in simulated body fluids. The improvement of effectiveness to corrosion resistance and the reduction in Ni release of NiTi SMA by Fenton’s oxidation method are comparable to those by oxygen plasma immersion ion implantation reported earlier.