Peritectic reaction on the Al-rich side of Al-Cr system

A long lasting controversy on the nature of the reaction between liquid, Al and Al45Cr7 has been ended by planar front solidification experiments of Al-Cr alloy in a Bridgman furnace. Cr depletion in the liquid ahead of the quenched planar interface proves without any ambiguity that the invariant reaction on the Al-rich side of the Al-Cr phase diagram is peritectic. A value of the diffusion coefficient of Cr in liquid Al, D-l = 2.4 x 10(-9) m(2)/s, was also deduced from the solute composition profile measured in the quenched liquid. (C) 2014 Elsevier B.V. All rights reserved.


Published in:
Journal Of Alloys And Compounds, 621, 283-286
Year:
2015
Publisher:
Lausanne, Elsevier
ISSN:
0925-8388
Keywords:
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 Record created 2015-02-20, last modified 2018-03-17

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