Liquid-liquid phase transition in supercooled yttria-alumina

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 f...

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Published inPhysical review letters Vol. 103; no. 22; p. 225702
Main Authors Barnes, Adrian C, Skinner, Lawrie B, Salmon, Philip S, Bytchkov, Alexei, Pozdnyakova, Irina, Farmer, Thomas O, Fischer, Henry E
Format Journal Article
LanguageEnglish
Published United States 27.11.2009
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Summary: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.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.103.225702