MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Fabrication and Corrosion Property of Novel Ti-Based Bulk Glassy Alloys without Ni
Fengxiang QinXinmin WangShengli ZhuAsahi KawashimaKatsuhiko AsamiAkihisa Inoue
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2007 Volume 48 Issue 3 Pages 515-518

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Abstract

New Ni-free bulk glassy alloys in the Ti47.5Zr2.5+xCu37.5−xPd7.5Sn5 (x=0,5,7.5) system were fabricated by copper mold casting with diameters from 1 to 3 mm, which are expected to be applied as biomaterials. The structure, thermal stability and corrosion resistance were investigated by X-ray diffraction, differential scanning calorimetry and electrochemical measurement, respectively. Surface information after immersion in Hanks’ solution was also characterized by using XPS. The results indicate that the bulk glassy alloys examined are spontaneously passivated. By anodic polarization, they show the passive current densities between 10−2 and 10−3 A/m2. The higher corrosion resistance for the Ti-based bulk glassy alloys is attributed to the formation of stable and protective passive films enriched with titanium and zirconium.

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© 2007 The Japan Institute of Metals and Materials
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