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

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

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5 Citations (Scopus)

Abstract

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 LnFeO<inf>3</inf> (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.

Original languageEnglish
Article number154905
JournalJournal of Applied Physics
Volume117
Issue number15
DOIs
Publication statusPublished - 2015 Apr 21

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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