Self-diffusion in high purity Fe-50 mass%Cr alloy

Motohide Sugihara, Yoshihiro Yamazaki, Seiichi Takaki, Kenji Abiko, Yoshiaki Iijima

研究成果: Contribution to journalArticle査読

16 被引用数 (Scopus)

抄録

Tracer self-diffusion coefficients of 51Cr and 59Fe in a high purity Fe-50 mass%Cr alloy have been determined in the temperature range between 923 and 1273 K by use of the sputter-microsectioning technique. A linear Arrhenius line has been observed for each self-diffusion across the α-σ phase transformation temperature 1103 K, which is consistent with the suppression of the σ phase formation by purification. The Arrhenius equations can be expressed by DCr = 0.54 × 10-4 exp(-251 kJ mol-1/RT)m2 s-1 and DFe = 0.30 × 10-4 exp(-243 kJ mol-1/RT) m2 s-1. The activation energies for the self-diffusion of Cr and Fe by the present work are much lower than 293 and 312 kJ mol-1 determined previously by Paxton et al. in the temperature range from 1223 to 1523 K, respectively.

本文言語英語
ページ(範囲)87-90
ページ数4
ジャーナルMaterials Transactions, JIM
41
1
DOI
出版ステータス出版済み - 1 2000
外部発表はい

All Science Journal Classification (ASJC) codes

  • 工学(全般)

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