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AC Modulation Calorimetry of Undercooled Liquid Ti34Zr11Cu47Ni8 and Zr57Nb5Ni12.6Al10Cu15.4: An MSL-1 Experiment Using TEMPUS

Published online by Cambridge University Press:  10 February 2011

S.C. Glade ,
D.S. Lee ,
R. Wunderlich  and
W.L. Johnson
S.C. Glade
Affiliation:
Materials Science Dept., 138-78, California Institute of Technology. Pasadena, CA 91125
D.S. Lee
Affiliation:
Amorphous Technologies International, 27722 El Lazo Road. Laguna Niguel, CA 29677
R. Wunderlich
Affiliation:
Technische Universität Berlin, Institut für Metallforschung, Hardenbergstr.36, D-10623 Berlin
W.L. Johnson
Affiliation:
Materials Science Dept., 138-78, California Institute of Technology. Pasadena, CA 91125
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Abstract

An AC modulation calorimetry (ACMC) experiment was performed on two bulk metallic glass forming alloys, Ti34Zr11CU47Ni8 (VIT 101) and Zr57Nb5Ni12.6Al10Cu15.4(VIT 106) on the recent MSL-1 shuttle flight using the TEMPUS hardware. VIT 106 exhibited a maximum undercooling of 140 K in free radiative cooling, while VIT 101 exhibited a smaller undercooling of 50 K. Specific heat measurements were done in both the stable and undercooled liquid regions. These results will be combined with further ground-based measurements in an electrostatic levitator for modeling the nucleation kinetics of these alloys and for calculation of the free energies and entropies of the undercooled liquids in these systems.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 551: Symposium JJ – Materials in Space-Science, Technology & Exploration , 1998 , 219
Copyright
Copyright © Materials Research Society 1999

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