High-temperature thermodynamic functions for zirconium and unsaturated zirconium hydrides
Giving greatest weight to the experimentally measured highest decomposition pressures and the enthalpies in onephase fields, thermodynamically interconsistent integral and differential enthalpies (heat contents), heat capacities, entropies, and Gibbs free energies were derived for the crystalline one- and two-phase fields of the zirconiumhydrogen system for all stoichiometric compositions from Zr to ZrH1.25 and over the temperature range 298.15 to 1,200 deg K. The properties were derived in analytical form, and in most cases are represented by numerical equations, with tabulation for zirconium and H/Zr atom ratios of 0.25, field boundaries, which are consistent with the derived properties, were located and are compared with those previously reported. In the Zr-H system the enthalpies are shown to relate certain properties at different compositions as well as at different temperatures. Some of the various data show good interconsistency, while others reveal discrepancies and are discussed critically.
- Research Organization:
- Originating Research Org. not identified
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-040816
- OSTI ID:
- 4691397
- Journal Information:
- Journal of Research of the National Bureau of Standards, Section A: Physics and Chemistry, Journal Name: Journal of Research of the National Bureau of Standards, Section A: Physics and Chemistry Journal Issue: 5 Vol. 67A; ISSN 0022-4332
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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