Compressibility and thermal expansion of LaNi5 and its substitutional derivatives (LaNi5−xMx; M=Mn, Al, Co)

Joubert, J.-M.; Cerny, Radovan; Latroche, M.; Percheron-Guégan, A.; Yvon, Klaus

doi:10.1016/j.intermet.2004.08.004

Scientific article

English

Compressibility and thermal expansion of LaNi₅ and its substitutional derivatives (LaNi_5−xM_x; M=Mn, Al, Co)

ContributorsJoubert, J.-M.; Cerny, Radovan; Latroche, M.; Percheron-Guégan, A.; Yvon, Klaus

Published inIntermetallics, vol. 13, no. 2, p. 227-231

Publication date2005

Abstract

The elastic properties of LaNi5 and related substitutional derivatives (LaNi4.6Mn0.4, LaNi4.7Al0.3, LaNi4.25Co0.75 and LaNi3.55Mn0.4Al0.3Co0.75) are investigated by means of room temperature compressibility and low-temperature thermal expansion (both studied by powder diffraction methods). Anisotropy of the compressibility and thermal expansion coefficients has been evidenced. The extent of this anisotropy changes, depending on the substituting element. A softening of the lattice accompanies also the substitution. These findings have been tentatively related to the nature and the quantity of the defects generated during hydride formation by those compounds.

Keywords

Rare-earth intermetallics
Elastic properties
Hydrogen storage
Defects: dislocation geometry and arrangement
Diffraction

Affiliation entities

Faculté des sciences / Section de physique / Département de physique de la matière quantique

Research groups

Groupe Cerny

Citation (ISO format)

JOUBERT, J.-M. et al. Compressibility and thermal expansion of LaNi₅ and its substitutional derivatives (LaNi_5−xM_x; M=Mn, Al, Co). In: Intermetallics, 2005, vol. 13, n° 2, p. 227–231. doi: 10.1016/j.intermet.2004.08.004

Article (Published version)

Identifiers

PID : unige:35484
DOI : 10.1016/j.intermet.2004.08.004

Additional URL for this publicationhttp://linkinghub.elsevier.com/retrieve/pii/S0966979504002845

Journal ISSN0966-9795

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Compressibility and thermal expansion of LaNi5 and its substitutional derivatives (LaNi5−xMx; M=Mn, Al, Co)

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Compressibility and thermal expansion of LaNi₅ and its substitutional derivatives (LaNi_5−xM_x; M=Mn, Al, Co)