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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.

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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.

Item Type:Article
Additional Information:©1993 The American Physical Society Received 3 December 1992 This work was supported by the U.S. Department of Eenrgy under Contract No. DE-FG03-86ER45270.
Record Number:CaltechAUTHORS:ANTprl93
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ID Code:1828
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Deposited On:20 Feb 2006
Last Modified:18 Sep 2014 18:11

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