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

Jun Sato, Katsunari Oikawa, Ryosuke Kainuma, Kiyohito Ishida

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Phase equilibria of solid phases in the Co-W system have been investigated by using two-phase alloys and diffusion couple technique. In addition, systematic studies of magnetic and martensitic transitions have been conducted by using Differential Scanning Calorimeter (DSC), Vibrating Sample Magnetometer (VSM) and dilatometric measurement. Two-phase separation into ferromagnetic αCo and paramagnetic αCo was confirmed in the Co-rich side. The Curie temperature and saturation magnetization decrease with increasing W content and those disappear at around 25 at%W. Furthermore, thermodynamic assessment by using CALPHAD approach has been performed. A set of thermodynamic values for describing the Gibbs energy of Co-W system yields a good agreement with experimental phase diagram. The calculation of metastable magnetically induced phase separation along the Curie temperature is also presented.

本文言語English
ページ(範囲)992-1001
ページ数10
ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
68
12
DOI
出版ステータスPublished - 2004 12

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金
  • 材料化学

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