首页|In situ synthesis of nanostructured titania film on NiTi shape memory alloy by Fenton's oxidation method
In situ synthesis of nanostructured titania film on NiTi shape memory alloy by Fenton's oxidation method
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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.
NiTi shape memory alloy(SMA)Fenton's oxidationthin filmscorrosion
CHU Cheng-lin、HU Tao、S. L. Wu、WANG Ru-meng、DONG Yin-sheng、LIN Ping-hua、C.Y. Chung、P. K. Chu
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School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
2007
Transactions of Nonferrous Metals Society of China
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