Two-step gas treatment of commercially pure titanium for anatase layer formation

Nobuyuki Umetsu, Takuro Okazumi, Kyosuke Ueda, Takayuki Narushima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A two-step gas treatment of commercially pure titanium (CP Ti) was investigated with a focus on the formation of the anatase phase. The first step was carried out in Ar-l%CO atmosphere at 1073 K for 0 ks or in N2 atmosphere at 1123 K for 14. 4 ks. The subsequent second step was carried out in air at 473-873 K for 0 ks and 86. 4 ks. A titanium oxycarbide (TiC 1-xOx) layer was formed after the first-step treatment in Ar-1% CO atmosphere, and an anatase-rich TiO2 layer was obtained after the second-step treatments in air at 673-873 K for 0 ks and at 573 - 773 K for 86. 4 ks. In particular, single-phase anatase formed under the condition of the second step in air at 573 K for 86. 4 ks. The anatase fraction in reaction layer could be controlled by varying the temperature and holding time of the second step. Both the TiN and Ti2 N phases were detected as reaction products after the first step in N2 atmosphere, and an anatase-containing TiQ2 layer was obtained after the second-step treatment in air at 723 K for 86. 4 ks. The formation of TiN and its oxidation at low temperatures seem to be required for the preparation of an anatase-containing TiO2 layer on Ti.

Original languageEnglish
Title of host publicationTi 2011 - Proceedings of the 12th World Conference on Titanium
Pages2106-2110
Number of pages5
Publication statusPublished - 2012 Dec 1
Event12th World Conference on Titanium, Ti 2011 - Beijing, China
Duration: 2011 Jun 192011 Jun 24

Publication series

NameTi 2011 - Proceedings of the 12th World Conference on Titanium
Volume3

Other

Other12th World Conference on Titanium, Ti 2011
CountryChina
CityBeijing
Period11/6/1911/6/24

Keywords

  • Anatase
  • Surface treatment
  • Thermal oxidation
  • Titanium (Ti)
  • Titanium nitride
  • Titanium oxycarbide (TiCO)

ASJC Scopus subject areas

  • Ceramics and Composites

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