Diffusion of Iron in β-Titanium under Hydrostatic High Pressure

• Araki H.

  Department of Materials Science and Engineering, Osaka University

• Shirai Y.

  Department of Materials Science and Engineering, Osaka University

• Yamane T.

  Department of Mechanical Engineering, Hiroshima Institute of Technology

• Miyamoto Y.

  Institute of Scientific and Industrial Research, Osaka University

書誌事項

タイトル別名

• Diffusion of Iron in .BETA.-Titanium under Hydrostatic High Pressure.
• Diffusion of Iron in ベータ Titanium under

抄録

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.

収録刊行物

• 高圧力の科学と技術

  高圧力の科学と技術 7 676-678, 1998

  日本高圧力学会

キーワード

• fast diffusion
• impurity diffusion
• interdiffusion
• activation volume
• diffusion mechanism

詳細情報

• CRID: 1390001204381379072
• NII論文ID: 10002691396
• NII書誌ID: AN10452913
• DOI: 10.4131/jshpreview.7.676
• ISSN: 13481940
• ISSN: 0917639X
• NDL書誌ID: 4494020
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4494020
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可