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Title Structural Evolution and Phase Transformation in Nanoquasicrystalline Al-Fe-Cr Alloy: DSC Analysis
Authors Byakova, A.V.
Cherednichenko, V.V.
Scheretskiy, A.A.
Vlasov, A.A.
Yurkova, A.I.
Keywords Nanoquasicrystals
Al-Fe-Cr Based Alloy
Structural Evolution
Phase Transformation
Type Conference Papers
Date of Issue 2012
URI http://essuir.sumdu.edu.ua/handle/123456789/34854
Publisher Sumy State University
License
Citation Structural Evolution and Phase Transformation in Nanoquasicrystalline Al-Fe-Cr Alloy: DSC Analysis [Текст] / A.V. Byakova, V.V. Cherednichenko, A.A. Scheretskiy et al. // Nanomaterials: Applications & Properties (NAP-2012) : 2-nd International conference, Alushta, the Crimea, September 17-22, 2012 / Edited by: A. Pogrebnjak. - Sumy : Sumy State University, 2012. - V.1, No1. - 01PCN19
Abstract Kinetic parameters for microstructural evolution and phase transformation in water atomized Al-Fe-Cr based alloy with nominal composition Al94Fe3Cr3 have been examined by means of developed precise method of DSC technique and confirmed by the results of XRD analysis. Two exothermic reactions including that with a maximum at 380 – 400 degrees Celsius has been ascribed to dislocation reorganisation and recrystallisation process within the Al matrix although the main exothermic reaction with a maximum around 540 degrees Celsius arose from decomposition of icosahedral quasicrystalline particles and simultaneous formation of the metastable Al6Fe phase and more stable crystalline particles compositionally corresponded to the O-Al13Cr2 and O-Al13Fe4 phases. Activation energy for the main exothermic reaction has been found to be roughly about 53.1 kJ mol-1 which is significantly smaller than that for the bulk diffusion of either iron or chromium atoms in aluminium and very close to that for the vacancy migration. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/34854
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