Solid-state synthesis of Mg2Si from Mg-Si mixture powder

K. Kondoh, H. Oginuma, E. Yuasa, T. Aizawa

研究成果: Article査読

53 被引用数 (Scopus)

抄録

The influence of the raw powder characteristics and cold compaction on the solid-state synthesis of Mg2Si from elemental Mg-Si mixture powder has been examined by thermal analysis using DSC thermogram. The Mg2Si synthesis progresses at the lower temperature range when employing the fine Si powder, because of the increase in the contacting area between the Mg and Si particles. MgO film, covering the Mg powder surface, prevents the Mg2Si synthesis due to its thermal stability, however SiO2 surface film is not so effective because of the deoxidization by Mg during heating. Concerning the effect of the compaction pressure, when the hard Si particles are embedded in the Mg powder after compacting the mixture powder, the mechanical breakage of the thermally stable MgO surface film occurs. Therefore, the enlargement of the contacting clean area between the particles causes the progress of the Mg2Si synthesis at the lower temperature. Base on these results, the bulk mechanically alloyed Mg-Si composite powder, in which the fine Si particles are distributed uniformly in the Mg matrix, shows a decrease of the reaction temperature by 350 K compared to the mixture powder.

本文言語English
ページ(範囲)1293-1300
ページ数8
ジャーナルMaterials Transactions
42
7
DOI
出版ステータスPublished - 2001 1月 1

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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