In situ formation of titania film on NiTi alloy treated with hydrogen peroxide solution at low temperature

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)834-838
Journal / PublicationTransactions of Nonferrous Metals Society of China (English Edition)
Volume15
Issue number4
Publication statusPublished - Aug 2005

Abstract

Chemically polished NiTi shape memory alloy (SMA) substrate was treated with a boiling aqueous solution containing hydrogen peroxide to form titania film in situ at low temperature. The surface characterizations of titania film on NiTi substrate were investigated by scanning electron microscopy, X-ray diffractometry and X-ray photoelectron spectroscopy. The results show that titania film is successfully fabricated in situ on NiTi SMA by this surface oxidation method. It is mainly composed of rutile and anatase, whose surface compositions and morphologies are sensitive to H2O2 content. In situ formation mechanism of titania film on NiTi substrate was discussed based on the experimental results.

Research Area(s)

  • NiTi alloy, Oxidation, Shape memory alloy (SMA), Surface structure, Thin films, Titania

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