Thermodynamic characterization of new palladium alloy tritides

J. S. Hölder, J. R. Wermer

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


The decay of tritium in a metal tritide generates 3He in the lattice which tends to degrade the performance of the material over time. It is desired to develop a material which minimizes the tritium aging effects and may be tailored to a particular tritium processing application. Pd alloys with Ni and Co have been investigated, as Pd tritide is known to be resistant to tritium aging effects and alloying provides a means for adjusting the plateau pressure of the metal tritide. Sets of tritium desorption isotherms were acquired at temperatures between 273 and 338 K over the pressure range of 1-900 kPa. The thermodynamic parameters of ΔH and ΔS for the β-α phase transition of the metal tritides were determined across the plateau regions of the pressure-composition-temperature curves. The average values of ΔH (kJ mol-1 T-1) and ΔS (J K-1 mol-1 T-1) were found to be 15.8 and 50.1 for Pd(2.8 wt.%)Ni, 13.7 and 50.3 for Pd(5.2 wt.%)Ni, 15.9 and 51.3 for Pd(2.8 wt.%)Co, and 13.6 and 51.8 for Pd(5.2 wt.%)Co, respectively.

Original languageEnglish (US)
Pages (from-to)773-779
Number of pages7
JournalJournal of Alloys and Compounds
Issue number1-2
StatePublished - Dec 15 1995
Externally publishedYes


  • Aging
  • Cobalt
  • Nickel
  • Palladium alloy titrides
  • Thermodynamic characterization

ASJC Scopus subject areas

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


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