Diffusion of Iron in .BETA.-Titanium under Hydrostatic High Pressure.
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- Araki H.
- Department of Materials Science and Engineering, Osaka University
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- Shirai Y.
- Department of Materials Science and Engineering, Osaka University
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- Yamane T.
- Department of Mechanical Engineering, Hiroshima Institute of Technology
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- Miyamoto Y.
- Institute of Scientific and Industrial Research, Osaka University
Bibliographic Information
- Other Title
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- Diffusion of Iron in β-Titanium under Hydrostatic High Pressure
- Diffusion of Iron in ベータ Titanium under
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Abstract
The impurity diffusion coefficient of Fe in β-Ti has been determined at temperatures of 1223 and 1273 K under pressures of 0. 1 MPa to 3. 0 GPa using (Ti) - (Ti-1. 93 at%Fe) diffusion couples. The diffusion coefficient decreases with pressure, and the values of activation volume, ΔV, are 0. 27Ω at 1223 K and 0. 23Ω at 1273 K, where Ω is the atomic volume of the host metal. The results of the present work contradict previous reports of negative activation volumes for Fe diffusion in the β-phase of Ti and Ti-4 at%Fe alloy, whereas are in good agreement with the recent study for the fast diffusion of Co and Ni in β-Ti. The magnitudes of ΔV/Ω obtained in the present work, which are approximately half of that normally expected for diffusion in bcc metals via monovacancy mechanism, can be interpreted in terms of the interstitial-substitutional dissociative model.
Journal
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- The Review of High Pressure Science and Technology
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The Review of High Pressure Science and Technology 7 676-678, 1998
The Japan Society of High Pressure Science and Technology
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Details 詳細情報について
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- CRID
- 1390001204381379072
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- NII Article ID
- 10002691396
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- NII Book ID
- AN10452913
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- ISSN
- 13481940
- 0917639X
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- NDL BIB ID
- 4494020
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed