Mechanism of the α-to-β phase transformation in the LaNi5-H2 system
Journal Article
·
· Journal of Alloys and Compounds
- Griffith U
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 ºC via the transient growth of an interfacial phase, the {gamma} 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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- FOREIGNNSF
- OSTI ID:
- 1021190
- Journal Information:
- Journal of Alloys and Compounds, Vol. 509, Issue (5) ; 02, 2011; ISSN 0925-8388
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- ENGLISH
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