Color tone and interfacial microstructure of white oxide layer on commercially pure Ti and Ti-Nb-Ta-Zr alloys

Eri Miura-Fujiwara, Keisuke Mizushima, Yoshimi Watanabe, Toshihiro Kasuga, Mitsuo Niinomi

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

In this study, the relationships among oxidation condition, color tone, and the cross-sectional microstructure of the oxide layer on commercially pure (CP) Ti and Ti-36Nb-2Ta-3Zr-0.3O were investigated. "White metals" are ideal metallic materials having a white color with sufficient strength and ductility like a metal. Such materials have long been sought for in dentistry. We have found that the specific biomedical Ti alloys, such as CP Ti, Ti-36Nb-2Ta-3Zr-0.3O, and Ti-29Nb-13Ta-4.6Zr, form a bright yellowish-white oxide layer after a particular oxidation heat treatment. The brightness L and yellowness +b of the oxide layer on CP Ti and Ti-36Nb-2Ta-3Zr-0.3O increased with heating time and temperature. Microstructural observations indicated that the oxide layer on Ti-29Nb-13Ta-4.6Zr and Ti-36Nb-2Ta-3Zr-0.3O was dense and firm, whereas a piecrust-like layer was formed on CP Ti. The results obtained in this study suggest that oxide layer coating on Ti-36Nb-2Ta-3Zr-0.3O is an excellent technique for dental applications.

Original languageEnglish
Article number11RD02
JournalJapanese journal of applied physics
Volume53
Issue number11
DOIs
Publication statusPublished - 2014 Nov 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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