Scientific article
English

Anisotropic diffraction peak broadening and dislocation substructure in hydrogen-cycled LaNi5 and substitutional derivatives

Published inJournal of applied crystallography, vol. 33, p. 997-1005
Publication date2000
Abstract

Anisotropic peak broadening in hydrogen-cycled hexagonal LaNi5 and substitutional derivatives has been studied by means of synchrotron powder diffraction. The data have been analysed by a local lattice parameter variation method implemented in a Rietveld code and by an individual profile fitting using a dislocation peak broadening model. Two main dislocation systems, both with Burgers vector 1/3(2110), are activated by misfit of the lattice parameters between the intermetallic compounds and their hydrides. Two types of diffraction peak broadening effect were observed as a function of the substitution in LaNi5: (i) a decrease or disappearance of the broadening related to the decrease of the total dislocation density and (ii) a change in the anisotropy of the broadening related to the change of the nature of the dislocation system involved. The latter effect was attributed to a change in shape of the hydride precipitates.

Research groups
Citation (ISO format)
CERNY, Radovan et al. Anisotropic diffraction peak broadening and dislocation substructure in hydrogen-cycled LaNi5 and substitutional derivatives. In: Journal of applied crystallography, 2000, vol. 33, p. 997–1005. doi: 10.1107/S0021889800004556
Main files (1)
Article (Published version)
accessLevelRestricted
Identifiers
Journal ISSN0021-8898
608views
1downloads

Technical informations

Creation14/04/2014 09:46:00
First validation14/04/2014 09:46:00
Update time14/03/2023 21:07:27
Status update14/03/2023 21:07:27
Last indexation30/10/2024 16:50:46
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack