High-temperature oxidation of pure titanium in CO{sub 2} and Ar-10%CO{sub 2} atmospheres
- Toyama Univ. (Japan)
- UCOM Co., Ltd., Akai (Japan)
- Tateyama Aluminum Industry Co., Ltd., Hayakawa (Japan)
The oxidation behavior of pure titanium has been investigated in the temperature range of 1000 K to 1300 K in CO{sub 2} or Ar-10%CO{sub 2}. Optical microscopy, electron probe microanalyses, and X-ray measurements on the oxide scales formed during oxidation indicate that their structures are nearly independent of temperature and the corrosion atmosphere. The scales consisted of two layers, an external one and an internal one, having a rutile (TiO{sub 2}) structure. The parabolic rate law was confirmed for growth of the external scale and the permeation depth of oxygen in titanium with apparent activation energies of 266 and 226 kJ/mol, respectively. The rate-determining diffusion species in the oxidation processes are discussed.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 563590
- Journal Information:
- Oxidation of Metals, Journal Name: Oxidation of Metals Journal Issue: 3-4 Vol. 48; ISSN OXMEAF; ISSN 0030-770X
- Country of Publication:
- United States
- Language:
- English
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