Amorphous Al1−xTix, Al1−xVx, and Al1−xFex phases in the hydrogen cycled TiCl3, VCl3 and FeCl3 enhanced NaAlH4 systems

► Quantification of amorphous Al1−xTMx phases in H cycled TMCln enhanced NaAlH4. ► Composite nano surface morphology between crystalline/amorphous Al1−xTMx: TM=Ti, V. ► All Fe atoms consumed within 0.1) ranges in composition from a-Al86.5Ti13.5→a-Al92Ti8. High resolution TEM studies of the Al1−xVx p...

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Bibliographic Details
Published in:Journal of alloys and compounds 2012-04, Vol.521, p.112-120
Main Authors: Pitt, M.P., Vullum, P.E., Sørby, M.H., Emerich, H., Paskevicius, M., Buckley, C.E., Gray, E. MacA, Walmsley, J.C., Holmestad, R., Hauback, B.C.
Format: Article
Language:English
Subjects:
Amorphous materials
Condensed matter: structure, mechanical and thermal properties
Diffraction
Exact sciences and technology
Halos
High resolution
Iron
Metal hydrides
Nanostructure
Phases
Physics
Single-crystal and powder diffraction
Structure of solids and liquids
crystallography
Synchrotron radiation
Titanium
Transition metal alloys and compounds
Transmission electron microscopy
Transmission electron microscopy (TEM)
X-ray diffraction and scattering
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Summary:► Quantification of amorphous Al1−xTMx phases in H cycled TMCln enhanced NaAlH4. ► Composite nano surface morphology between crystalline/amorphous Al1−xTMx: TM=Ti, V. ► All Fe atoms consumed within 0.1) ranges in composition from a-Al86.5Ti13.5→a-Al92Ti8. High resolution TEM studies of the Al1−xVx phases in the H cycled PM NaAlH4+0.1VCl3 system demonstrates that a nanoscopic composite morphology can exist between face centred cubic (fcc) crystalline (c-) Al1−xVx and a-Al1−xVx phases, with the c-Al1−xVx/a-Al1−xVx composite embedded on the NaAlH4 surface. The amorphous Al1−xVx reaches ca. 28at.% V.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2012.01.062