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Decomposition in Pd40Ni40P20 Bulk Metallic Glass

Published online by Cambridge University Press:  10 February 2011

M. K. Miller ,
R. B. Schwarz  and
Yi He
M. K. Miller
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831–6376, [email protected]
R. B. Schwarz
Affiliation:
Center for Materials Science, Los Alamos National Laboratory, CMS, Mail Stop K765, Los Alamos, NM 87545
Yi He
Affiliation:
Center for Materials Science, Los Alamos National Laboratory, CMS, Mail Stop K765, Los Alamos, NM 87545
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Abstract

An atom probe field ion microscope and 3-dimensional atom probe characterization of the solute distribution in a bulk Pd40Ni40P20 metallic glass in the as-cast state and after annealing has been performed. Statistical analysis of the atom probe atom-by-atom data detected the presence of short range ordering in the as-cast alloy. Phase separation at the nanometer level is observed in glassy samples after annealing above the glass-transition temperature. Crystallization proceeds by phase separation into three distinct crystalline phases. Atom probe analysis of the alloy annealed for 1 h at 410°C revealed that the primary nickel phosphide phase contained significant levels of palladium, the palladium-rich Pd3P phosphide phase contained low levels of nickel and there was a small amount of a palladium-nickel solid solution.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 554: Symposium MM – Bulk Metallic Glasses , 1998 , 9
Copyright
Copyright © Materials Research Society 1999

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