NASA Technical Reports Server (NTRS) : Crystallographic pdf

NASA Technical Reports Server (NTRS) : Crystallographic

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Undercooling a melt often facilitates a metastable phase to nucleate preferentially. Although the classical nucleation theory shows that the most critical factor for forming a metastable phase is the interface free energy, the crystallographic stability is also indispensable for the phase to be frozen at ambient temperature. In compound materials such as oxides, authors have suggested that the decisive factors for forming a critical nucleus are not only the free energy difference but also the difference of the entropy of fusion between stable and metastable phases. In the present study, using REFeO3 (RE: rare-earth element) as a model material, we investigate the formation of a metastable phase from undercooled melts with respect to the competitive nucleation and crystallographical stabilities of both phases

• Creator/s: NASA Technical Reports Server (NTRS
• Date: 9/1/2012
• Year: 2012
• Book Topics/Themes: NASA Technical Reports Server (NTRS), CRYSTALLOGRAPHY, METASTABLE STATE, OXIDES, RARE EARTH ELEMENTS, CONTAINERLESS MELTS, CRYSTAL GROWTH, CRYSTAL MORPHOLOGY, SCANNING ELECTRON MICROSCOPY, LEVITATION, IRON COMPOUNDS, X RAY DIFFRACTION, Kuribayashi, Kazuhiko, Kumar, M. S. Vijaya

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