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Atomic structure and formation of CuZrAl bulk metallic glasses and composites
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
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Number of Authors: 112015 (English)In: Acta Materialia, ISSN 1359-6454, E-ISSN 1873-2453, Vol. 100, p. 369-376Article in journal (Refereed) Published
Abstract [en]

Cu47.5Zr47.5Al5 metallic glass is studied experimentally by high-energy X-ray diffraction, neutron diffraction with isotopic substitution, electron diffraction and X-ray absorption spectroscopy. The atomic structure of the glass is modeled by reverse Monte-Carlo and molecular dynamics simulations. RMC modeling of seven experimental datasets enabled reliable separation of all partial pair distribution functions for Cu47.5Zr47.5Al5 metallic glass. A peculiar structural feature of the ternary alloy is formation of the strong Al-Zr bonds, which are supposed to determine its high viscosity and enhanced bulk glass formation. Analysis of the local atomic order in Cu47.5Zr47.5Al5 glass and Cu10Zr7, CuZr2 and CuZr B2 crystalline structures elucidates their similarities and differences explaining the phase formation sequence by devitrification of the glass.

Place, publisher, year, edition, pages
2015. Vol. 100, p. 369-376
Keywords [en]
Metallic glass, Structure, Phase formation, Diffraction, EXAFS
National Category
Chemical Sciences Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-122914DOI: 10.1016/j.actamat.2015.08.060ISI: 000362616400038OAI: oai:DiVA.org:su-122914DiVA, id: diva2:871726
Available from: 2015-11-16 Created: 2015-11-11 Last updated: 2022-02-23Bibliographically approved

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Tran, Dung TrungSvensson, Gunnar

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