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Thermal stability of RE5(SixGe1-x)(3) plates in RE5(SixGe1-x)(4) alloys, where RE = Gd and Ho

TitleThermal stability of RE5(SixGe1-x)(3) plates in RE5(SixGe1-x)(4) alloys, where RE = Gd and Ho
Publication TypeJournal Article
Year of Publication2010
AuthorsCao Q, Chumbley LS, Qian Z
Journal TitleIntermetallics
Volume18
Pages1021-1026
Date Published05/01
ISBN Number0966-9795
Accession NumberISI:000277494400041
Keywordselectron microscopy, features, gd-5(sixge1-x)(4), gd5si2ge2, heat treatment, identification, rapid solidification, rare-earth intermetallics, scanning, transition, transmission
Abstract

The stability of RE5(SixGe1-x)(3) plates was studied through electron microscopy examination of as-cast and annealed Gd5Ge4 single crystal samples. Thermal annealing of samples at 1200 degrees C showed instability of the plates and a sluggish dissolution into the matrix. Scanning electron microscopy of Ho-5(Si0.8Ge0.2)(4) samples that had undergone laser surface melting indicated that the resulting rapid solidification of the melt pool suppressed precipitation of the characteristic 5:3 thin plates. (C) 2010 Elsevier Ltd. All rights reserved.
URL<Go to ISI>://000277494400041