Thermal transport properties of hafnium hydrides and deuterides

B. Tsuchiya, Y. Arita, H. Muta, K. Kurosaki, Kenji Konashi, Shinji Nagata, T. Shikama

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The thermal conductivities of δ′-, δ-, δ+ε-, and ε-phase hafnium hydrides and deuterides with various hydrogen isotope concentrations (HfHx, 1.48 ≤ x ≤ 2.03; HfDx, 1.55 ≤ x ≤ 1.94) were evaluated within the temperature range of 290-570 K from the measured thermal diffusivity, calculated specific heat, and density. The thermal conductivities of δ′-, δ-, δ+ε-, and ε-phase HfHx and HfDx are independent of the temperature within the range 300-550 K and are in the range 0.15-0.22 W/cm K and 0.17-0.23 W/cm K, respectively; these values are similar to and lower than the observed thermal conductivities of α-phase Hf. The experimental results for the electrical resistivities of δ′-, δ-, δ+ε-, and ε-phase HfHx and HfDx and the Lorenz number corresponding to the electronic conduction, obtained from the Wiedemann-Franz rule, indicated that heat conduction due to electron migration significantly influences the thermal conductivity values at high temperatures. On the other hand, heat conduction due to phonon migration significantly affects the isotope effects on the thermal transport properties.

Original languageEnglish
Pages (from-to)464-470
Number of pages7
JournalJournal of Nuclear Materials
Volume392
Issue number3
DOIs
Publication statusPublished - 2009 Aug 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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  • Cite this

    Tsuchiya, B., Arita, Y., Muta, H., Kurosaki, K., Konashi, K., Nagata, S., & Shikama, T. (2009). Thermal transport properties of hafnium hydrides and deuterides. Journal of Nuclear Materials, 392(3), 464-470. https://doi.org/10.1016/j.jnucmat.2009.04.009