An experimental verification of a criterion for forming metastable phases in containerless solidification

K. Kuribayashi, H. Kato, K. Nagayama, Y. Inatomi, M. S.Vijaya Kumar

研究成果: Article査読

5 被引用数 (Scopus)

抄録

On the thermodynamic condition for forming a metastable phase from undercooled melt in a containerless state, we had proposed a criterion that crystals will preferentially form if they have a smaller entropy of fusion than the entropy of fusion of equilibrium crystals (Kuribayashi et al., Mater. Sci. Eng., A 449-451, 675 (2007)). This criterion is proposed for being applied to materials that exhibit a faceted interface, such as semiconductors and oxides. However, no experimental data that support this criterion have been obtained. From this point, we used an aerodynamic levitator as a tool for forming metastable phases from undercooled melt and verified the above-mentioned criterion using LnFeO3 (Ln: lanthanide and Y) as the model material. In addition, the condition for double recalescence, which corresponds to forming metastable phases and stable phases, was discussed in terms of competitive 2D isomorphic nucleation of the metastable phase and 3D polymorphic nucleation of the stable phase.

本文言語English
論文番号154905
ジャーナルJournal of Applied Physics
117
15
DOI
出版ステータスPublished - 2015 4 21

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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