Isotope effects on the physicochemical properties of zirconium hydride

Citation
S. Yamanaka et al., Isotope effects on the physicochemical properties of zirconium hydride, J ALLOY COM, 295, 1999, pp. 908-914
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN journal
09258388 → ACNP
Volume
295
Year of publication
1999
Pages
908 - 914
Database
ISI
SICI code
0925-8388(199912)295:<908:IEOTPP>2.0.ZU;2-F
Abstract
The isotope effects on the physicochemical properties of zirconium hydride have been studied. The zirconium deuteride specimens in the form of pellets (6-mm diameter x 10 mm length) were loaded with deuterium contents with 1. 5-1.7 D/Zr, and were fabricated directly from zirconium metal in a modified UHV Sieverts apparatus. The X-ray diffraction analysis showed that all the zirconium deuterides prepared exhibited CaF2-type structure(delta ZrD2-x), and the lattice parameter of delta ZrD2-x was smaller than that of delta Z rH The zirconium deuteride had higher elastic moduli than the hydride. The microhardness of the zirconium deuteride was slightly higher than that of h ydride. The physicochemical properties of the zirconium deuteride such as D ebye temperature and heat capacity were estimated from the sound velocities and the thermal expansion data. The Debye temperature and heat capacity of zirconium deuteride were higher than that of zirconium hydride. (C) 1999 E lsevier Science S.A. All rights reserved.