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Title

Microstructural transformation of quasicrystalline AlFeCrTi extruded bars upon long thermal treatments

AuthorsGarcía Escorial, Asunción; Natale, E.; Cremaschi, V.; Todd, I.; Lieblich, Marcela
KeywordsQuasicrystalline
Microstructure
Rapid Solidification
Nanostructured
Issue Date2015
PublisherElsevier
CitationJournal of Alloys and Compounds 643: S199-S203 (2015)
Abstract© 2015 Elsevier B.V. All rights reserved. Bulk Al<inf>93</inf>Fe<inf>3</inf>Cr<inf>2</inf>Ti<inf>2</inf> bars extruded from gas atomised powder particles present a microstructure of an aluminium matrix reinforced with a spherical nanoquasicrystalline phase. In this work the evolution of the microstructure of Al<inf>93</inf>Fe<inf>3</inf>Cr<inf>2</inf>Ti<inf>2</inf> extruded bars upon heating at 400 °C for up to 1000 h is investigated by means of X-ray diffraction, differential scanning calorimetry, scanning electron microscopy and transmission electron microscopy. According to our observations we propose that the quasicrystalline alloy evolves in two steps: a first step consists in the decomposition of the supersaturated solid solution of the matrix and the quasicrystals, and a second step in the transformation of the quasicrystals into the equilibrium phases.
Publisher version (URL)http://dx.doi.org/10.1016/j.jallcom.2014.12.164
URI10261/129539
DOI10.1016/j.jallcom.2014.12.164
Identifiersdoi: 10.1016/j.jallcom.2014.12.164
issn: 0925-8388
Appears in Collections:(CENIM) Artículos
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