Plasma and Fusion Research

Volume 10, 3405021 (2015)

Regular Articles

Properties of Cold-Pressed Metal Hydride Materials for Neutron Shielding in a D-T Fusion Reactor
Hiroaki MUTA, Teruya TANAKA1), Yuji OHISHI, Ken KUROSAKI, Yoshimitsu HISHINUMA1), Shinsuke YAMANAKA and Takeo MUROGA1)
Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
1)
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292, Japan
(Received 25 November 2014 / Accepted 2 February 2015 / Published 19 March 2015)

Abstract

Thinner radiation shielding materials are desired for deuterium-tritium fusion reactors. Metal hydrides are considered one of the candidate materials because of their high hydrogen density. However, the bulk hydride is brittle and difficult to fabricate. In the present study, titanium- and zirconium-hydride pellets were prepared by cold pressing from their powders to simplify the fabrication process. The pressing strongly deforms the hydride particle; ≈90% of the theoretical density was achieved by cold pressing with the pressure of about 1 GPa. Thermal conductivities of the high-density pellets were comparable with those for the bulk metal hydrides. The results indicate that cold pressing is a promising way of fabricating dense metal hydrides.

Keywords

titanium hydride, zirconium hydride, neutron shielding material, cold pressing, thermal conductivity

DOI: 10.1585/pfr.10.3405021

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This paper may be cited as follows:

Hiroaki MUTA, Teruya TANAKA, Yuji OHISHI, Ken KUROSAKI, Yoshimitsu HISHINUMA, Shinsuke YAMANAKA and Takeo MUROGA, Plasma Fusion Res. 10, 3405021 (2015).