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Steady State Phase Diagram of Cu-Ag Under Ball Milling: An XRD and APFIM Study

Published online by Cambridge University Press:  21 February 2011

F. Wu ,
P. Bellon ,
A.J. Melmed  and
T.A. Lusby
F. Wu
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL61801, USA
P. Bellon
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL61801, USA
A.J. Melmed
Affiliation:
Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
T.A. Lusby
Affiliation:
Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD 21218, USA
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Abstract

The nature of the steady state reached during ball milling of CuxAg1−x powders (x=35 to 75) is studied as a function of the milling temperature (85K≤T≤503K). The characterization of the powders is performed by using x-ray diffraction, differential calorimetry and atom probe field ion microscopy. A steady-state phase diagram is built. Three-phase coexistence is shown to generally take place at intermediate milling temperatures. Atom probe data reveals that the solid solution stabilized by low milling temperature is nearly random, where as milling at elevated temperatures results in the decomposition of the elements at a lengthscale of 20∼30 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 581: Symposium F – Nanophase & Nanocomposite Materials II , 1999 , 271
Copyright
Copyright © Materials Research Society 2000

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References

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