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The solidification of Al-Pd-Mn studied by high-energy X-ray diffraction from electrostatically levitated samples

TitleThe solidification of Al-Pd-Mn studied by high-energy X-ray diffraction from electrostatically levitated samples
Publication TypeJournal Article
Year of Publication2017
AuthorsQuirinale, DG, Kreyssig, A, Saunders, S, Messina, D, Straszheim, WE, Canfield, PC, Kramer, MJ, Goldman, AI
JournalZeitschrift Fur Kristallographie-Crystalline Materials
Volume232
Pagination619-627
Date Published07
Type of ArticleArticle
ISBN Number2194-4946
Accession NumberWOS:000405516600014
Keywordscrystal-forming alloys, Crystallography, electrostatic levitation, growth, high-energy x-ray diffraction, icosahedral, icosahedral quasi-crystal, melts, palladium, phase, phase determination, phase-diagram, quasicrystals, Short-range order, symmetry, system
Abstract

-phase orthorhombic approximant, along with minor phases identified as Al and, most likely, the R-phase orthorhombic approximant. We have also observed a distinct prepeak in the liquid at high temperature, signifying the presence of extended atomic order. Interestingly, this prepeak was not observed in previous neutron diffraction measurements on the Al-Pd-Mn system. No undercooling was observed preceding the solidification of the i-Al-Pd-Mn phase from the melt which may signal the close similarity of the short-range order in the solid and liquid. However, this can not be clearly determined because of the potential for heterogenous nucleation associated with the presence of an Al2O3 impurity at the surface of the sample.

DOI10.1515/zkri-2016-2037
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Structures and Dynamics

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Correlations

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Complex States