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The glass transition, crystallization and melting in Au-Pb-Sb alloysThe glass transition, crystallization and melting of Au(55)Pb(22.5)Sb(22.5) alloys have been studied by differential scanning calorimetry DSC. Crystallization on heating above the glass transition temperature Tg (45 C) begins at 64 C. Further crystallization events are observed at 172 C and 205 C. These events were found to correspond to the formation of the intermetallic compounds AuSb2, Au2Pb, and possibly AuPb2, respectively. Isothermal DSC scans of the glassy alloy above Tg were used to monitor the kinetics of crystallization. The solidification behavior and heat capacity in the glass-forming composition range were determined with droplet samples. An undercooling level of 0.3T(L) below the liquidus temperature T(L) was achieved, resulting in crystallization of different stable and metastable phases. The heat capacity C(P) of the undercooled liquid was measured over an undercooling range of 145 C.
Document ID
19890025251
Document Type
Reprint (Version printed in journal)
Authors
Lee, M. C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Allen, J. L. (California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Fecht, H. J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Perepezko, J. H. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ohsaka, K. (Wisconsin, University Madison, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1988
Publication Information
Publication: Materials Science and Engineering
Volume: 97
ISSN: 0025-5416
Subject Category
METALLIC MATERIALS
Distribution Limits
Public
Copyright
Other