Cu基-Fe合金における整合γ-Fe粒子の成長と界面エネルギー

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タイトル別名
  • The Growth Kinetics and Interfacial Energy of Coherent γ-Fe Particles in Cu-Fe Alloys
  • Cuキ Fe ゴウキン ニ オケル セイゴウガンマ Fe リュウシ ノ セイチ
  • The Growth Kinetics and Interfacial Energy of Coherent γ-Fe Particles in Cu-Fe Alloys

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The growth of coherent γ-iron precipitates in Cu-0.4%Fe and Cu-1.2%Fe alloys aged at 873 and 973 K was examined by transmission electron microscopy to evaluate the interface energy between copper and coherent γ-iron.<BR>The growth kinetics of γ-Fe particles could be described by the law of the Lifshitz-Wagner theory, \barR∝t1⁄3 (\barR: mean particle radius, t: ageing time), and the distribution of particle size was also in agreement with that expected from the above theory.<BR>The interface energy of coherent γ-iron in copper, which was evaluated from the growth rates of γ-iron particles based on the theory, increased with increasing volume fraction of particles. Furthermore, it was largely affected by a slight difference in the values of solubilities (equilibrium molar concentration of solute) as reported by some workers; it varied from about 0.25 to 0.35 J/m2 depending of the values of solubilities used. It was concluded by examing the methods used for determining the solubilities of iron in copper that the fomer value, 0.25±0.05 J/m2, was more reasonable for the interface energy of coherent γ-iron. The value was about one-half of the interface energy between copper and incoherent γ- or α-iron (about 0.52 J/m2), which was estimated from the dihedral angle of these incoherent particles existing in the grain boundaries of the matrix.

収録刊行物

  • 日本金属学会誌

    日本金属学会誌 41 (12), 1285-1289, 1977

    公益社団法人 日本金属学会

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