Mechanism of the α-to-β phase transformation in the LaNi5–H2 system

Autor:	M.P. Pitt, Tomasz Blach, David Cookson, E. MacA. Gray
Rok vydání:	2011
Předmět:	Hydrogen Hydride Mechanical Engineering Kinetics Metals and Alloys Intermetallic chemistry.chemical_element Hydrogen storage Crystallography chemistry Mechanics of Materials X-ray crystallography Materials Chemistry Powder diffraction Solid solution
Zdroj:	Journal of Alloys and Compounds. 509:1630-1635
ISSN:	0925-8388
Popis:	High-energy synchrotron in situ X-ray powder diffraction has been used to elucidate the mechanism of the hydriding phase transformation in a LaNi5 model hydrogen storage intermetallic in real time. The transformation proceeds at 10 °C via the transient growth of an interfacial phase, the γ phase, with lattice parameters intermediate between those of the α (dilute solid solution) and β (concentrated hydride) phases. The γ phase forms to partially accommodate the 24% change in unit cell volume between the α and β phases during hydriding and dehydriding. The α, γ and β phases coexist at the nanoscopic level.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c15213628ef9d2b97c4f1c5a62e78b1d https://doi.org/10.1016/j.jallcom.2010.11.083 Zobrazit plný text záznamu Full Text from ScienceDirect