Deuterium absorption properties and crystal structure of UNiAl

• Published in: Journal of alloys and compounds Vol. 269; no. 1; pp. 162 - 165
• Main Authors: Yamamoto, T., Ishii, Y., Kayano, H.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.05.1998; Elsevier
• Subjects: Alloys; Applied sciences; Condensed matter: structure, mechanical and thermal properties; Deuterium sorption; Exact sciences and technology; Metal hydride; Metals. Metallurgy; Neutron diffraction; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Structure refinement; Metal hydride; Deuterium sorption; Neutron diffraction; Structure refinement; Nickel alloys; Aluminium alloys; Ternary alloys; Uranium alloys; Actinide alloys; Deuteration; Experimental study; Transition element alloys; Crystal structure
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(98)00221-7

Deuterium absorption properties of UNiAl were examined under a deuterium pressure up to 5 MPa, and the crystal structure of the obtained deuteride was examined in detail by means of neutron powder diffraction. Rietveld refinements showed that metallic atoms are shifted much upon deuterium absorption, which leads to new interstitial sites preferred by deuterium, and to a high absorption capacity of deuterium, 2.2 D/UNiAl. It was also shown that the U–D bonds in UNiAlD 2.2 are significantly longer than the characteristic length in UD 3, but this seems consistent with the number of atoms surrounding the site.