Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2015, Vol. 26 ›› Issue (1): S10312 doi: 10.13538/j.1001-8042/nst.26.S10312


Hydriding properties of uranium alloys for purposes of searching for new hydrogen storage materials

Michio Yamawaki,1 Takuya Yamamoto,1 Yuji Arita,1 Fumihiro Nakamori,1 Kazuhito Ohsawa,2 and Kenji Konashi3   

  1. 1Research Institute of Nuclear Engineering, University of Fukui,1-2-4, Kanawa-cho, Tsuruga, Fukui, 914-0055, Japan
    2Research Institute for Applied Mechanics, Kyushu University,6-1 Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan
    3Institute for Materials Research, Tohoku University, 2145-2 Narita-cho,Oarai, Higashi-Ibaragi-gun, Ibaragi, 311-1313, Japan
  • Contact: Michio Yamawaki
  • Supported by:

    Grants-in-Aid for Scientific Research (No. 25420903) from
    the Ministry of Education, Culture, Sports, Science and Technology of
    Japan and Japan Industrial Location Center

Michio Yamawaki, Takuya Yamamoto, Yuji Arita, Fumihiro Nakamori, Kazuhito Ohsawa, and Kenji Konashi. Hydriding properties of uranium alloys for purposes of searching for new hydrogen storage materials.Nuclear Science and Techniques, 2015, 26(1): S10312     doi: 10.13538/j.1001-8042/nst.26.S10312


Hydriding properties of uranium alloys have been studied to search for new hydrogen storage materials to be
applied to hydrogen energy systems. Application of uranium-base hydrogen storage materials can be expected
to alleviate the risk, as well as to reduce the cost incurred by globally-stored large amounts of depleted uranium
left after uranium enrichment. Various uranium alloys have been examined in terms of hydrogen absorptiondesorption
properties, among which UNiAl intermetallic compound showed promising characteristics, such
as lower absorption-desorption temperatures and better anti-powdering strength. First principle calculation
has been carried out on UNiAl hydride to predict the change of crystal structure and the lattice constant with
increasing hydrogen content, which showed this calculation to be promising in predicting candidates for good
hydrogen absorbers.

Key words: Depleted uranium, Hydrogen storage material, Uranium alloys, UNiAl intermetallic compound, First principles calculation