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Vibrational entropy of ordered and disordered Ni3Al

Anthony, L. and Okamoto, J. K. and Fultz, B. (1993) Vibrational entropy of ordered and disordered Ni3Al. Physical Review Letters, 70 (8). pp. 1128-1130. ISSN 0031-9007. doi:10.1103/PhysRevLett.70.1128.

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We have measured the difference in vibrational entropy of Ni3Al in two states of chemical order: as a disordered fcc solid solution, and as the equilibrium L12 ordered structure. Data were obtained from three independent methods: low-temperature calorimetry, temperature-dependent x-ray diffractometry, and temperature-dependent extended electron energy loss fine structure spectrometry. We estimate that at high temperatures, the vibrational entropy of chemically disordered Ni3Al is 0.3kB/atom greater than for ordered Ni3Al.

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Fultz, B.0000-0002-6364-8782
Additional Information:© 1993 The American Physical Society Received 3 December 1992 This work was supported by the U.S. Department of Energy under Contract No. DE-FG03-86ER45270.
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Department of Energy (DOE)DE-FG03-86ER45270
Issue or Number:8
Record Number:CaltechAUTHORS:ANTprl93
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1828
Deposited By: Archive Administrator
Deposited On:20 Feb 2006
Last Modified:08 Nov 2021 19:42

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