Diffusion of Iron in β-Titanium under Hydrostatic High Pressure

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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 = The Review of high pressure science and technology  

    高圧力の科学と技術 = 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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各種コード

  • NII論文ID(NAID)
    10002691396
  • NII書誌ID(NCID)
    AN10452913
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    0917639X
  • NDL 記事登録ID
    4494020
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z17-1589
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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