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American Physical Society, Physical Review Letters, 22(103), 2009

DOI: 10.1103/physrevlett.103.225702

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Liquid-Liquid Phase Transition in Supercooled Yttria-Alumina

This paper is available in a repository.
This paper is available in a repository.

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Abstract

The structure and thermal characteristics of aerodynamically levitated samples of yttria-alumina in the liquid, supercooled liquid and solid phases were explored in an extensive series of high energy x-ray diffraction, small angle neutron scattering, and pyrometric cooling measurements. Particular focus was placed on the compound (Y2O3)(x)(Al2O3)(1-x) with x = 0.2 for which a liquid-liquid phase transition at a temperature of 1788 K has recently been reported. No structural or thermal signature in support of this metastable phase transition could be found.