Empirical expression for the pressure-composition-temperature curve of the Zr2Fe-deuterium system

Satoshi Fukada, Masabumi Nishikawa

Research output: Contribution to journalLetter

5 Citations (Scopus)

Abstract

Empirical equations for the pressure-composition-temperature (PCT) curve of the Zr2Fe-D2 system were developed using the relation of RgT In(pD2/p0) = ΔHs - T(ΔSs + 2S̄conf). The constant value of -101.8 kJ mol-1 was given for ΔHs regardless of the atomic ratio of D to Zr2Fe, which is denoted as r. The ΔSs + 2S̄conf term was expressed by using the fourth-order polynomial of r. Although a past analytical equation could not be extrapolated to lower pressure, the present empirical equation fitted well a wide range of the PCT data. When Zr2Fe underwent the disproportional reaction, PCT data could not be correlated by the empirical equations.

Original languageEnglish
JournalJournal of Alloys and Compounds
Volume234
Issue number2
DOIs
Publication statusPublished - Feb 15 1996

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Deuterium
Chemical analysis
Temperature
Polynomials

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Empirical expression for the pressure-composition-temperature curve of the Zr2Fe-deuterium system. / Fukada, Satoshi; Nishikawa, Masabumi.

In: Journal of Alloys and Compounds, Vol. 234, No. 2, 15.02.1996.

Research output: Contribution to journalLetter

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AB - Empirical equations for the pressure-composition-temperature (PCT) curve of the Zr2Fe-D2 system were developed using the relation of RgT In(pD2/p0) = ΔHs - T(ΔSs + 2S̄conf). The constant value of -101.8 kJ mol-1 was given for ΔHs regardless of the atomic ratio of D to Zr2Fe, which is denoted as r. The ΔSs + 2S̄conf term was expressed by using the fourth-order polynomial of r. Although a past analytical equation could not be extrapolated to lower pressure, the present empirical equation fitted well a wide range of the PCT data. When Zr2Fe underwent the disproportional reaction, PCT data could not be correlated by the empirical equations.

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