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Influence of powder consolidation methods on the structural and thermal properties of a nanophase Cu-50wt%Ag alloy

Einfluß der Pulverkompaktierungsmethode auf das Gefüge und die thermischen Eigenschaften einer nanokristallinen Cu-50gew%Ag Legierung
 
: Shen, H.; Li, Z.; Günther, B.; Korznikov, A.V.; Valiev, R.Z.

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Nanostructured materials 6 (1995), pp.385-388
ISSN: 0965-9773
English
Journal Article
Fraunhofer IFAM ()
Kornwachstum; Kugelmahlen; mechanisches Legieren; Mikrogefüge; nanokristalliner Werkstoff; Pulvermetallurgie; Pulverpressen; Röntgenbeugung

Abstract
Nanocrystalline Ag-Cu powder compacts of identical composition have been prepared by 3 different methods: a) compaction of Ag-Cu alloy nanopowder prepared by inert gas condensation of a prealloy (IGC), b) mechanical alloying (MA) of elemental Ag and Cu powders, c) severe plastic deformation (SPID) of a course grained ingot material as well as of a compact of [GC and MA powder. The resulting microstructures have been studied as a function of annealing temperature by means of XRD and TEM in-situ. It is shown that IGC of the prealloy results in a duplex nanostructure, whereas MA and SPID lead to a metastable solid solution phase that decomposes to fine Ag and Cu on heating.

: http://publica.fraunhofer.de/documents/PX-18482.html