Experimental verification of magnetically induced phase separation in αCo phase and thermodynamic calculations of phase equilibria in the Co-W system

Jun Sato, Katsunari Oikawa, Ryosuke Kainuma, Kiyohito Ishida

研究成果: Article査読

31 被引用数 (Scopus)

抄録

Phase equilibria of solid phases in the Co-W system were investigated using two-phase alloys and the diffusion couple technique. In addition, systematic studies of magnetic and martensitic transitions were conducted by Differential Scanning Calorimetry (DSC), Vibrating Sample Magnetomety (VSM) and dilatometric measurement. Phase separation into ferromagnetic αCo and paramagnetic αCo was confirmed on the Co-rich side. The Curie temperature and saturation magnetization decreased with increasing W content and vanished at around 25 at%W. Furthermore, thermodynamic assessment by the CALPHAD approach was performed. A set of thermodynamic values describing the Gibbs energy of the Co-W system was in good agreement with the experimental phase diagram. Calculation of metastable magnetically induced phase separation in the hcp phase along the Curie temperature was also performed.

本文言語English
ページ(範囲)1199-1207
ページ数9
ジャーナルMaterials Transactions
46
6
DOI
出版ステータスPublished - 2005 6

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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