Amorphous Al1-xTix, Al1-xVx, and Al1-xFex phases in the hydrogen cycled TiCl3, VCl3 and FeCl3 enhanced NaAlH4 systems
The twice hydrogen (H) cycled planetary milled (PM) and cryo milled (CM) NaAlH4 + xTMCl3 (transition metal (TM) = Ti, V, Fe) systems (x > 0.1) have been studied by high resolution synchrotron X-ray diffraction, and high resolution transmission electron microscopy (TEM). Intense primary amorphous...
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| Format: | Journal Article |
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Elsevier B.V.
2012
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| Online Access: | http://hdl.handle.net/20.500.11937/49728 |
| _version_ | 1848758302740054016 |
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| author | Pitt, M. Vullum, P. Sørby, M. Emerich, H. Paskevicius, Mark Buckley, Craig Gray, E. Walmsley, J. Holmestad, R. Hauback, B. |
| author_facet | Pitt, M. Vullum, P. Sørby, M. Emerich, H. Paskevicius, Mark Buckley, Craig Gray, E. Walmsley, J. Holmestad, R. Hauback, B. |
| author_sort | Pitt, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The twice hydrogen (H) cycled planetary milled (PM) and cryo milled (CM) NaAlH4 + xTMCl3 (transition metal (TM) = Ti, V, Fe) systems (x > 0.1) have been studied by high resolution synchrotron X-ray diffraction, and high resolution transmission electron microscopy (TEM). Intense primary amorphous (a-) Al1−xTMx halos are evident in diffraction data of PM samples for V and Fe, and in CM samples for Ti, V, and Fe. Weaker primary amorphous Al1−xTix halos are evident in PM samples for Ti. The Ti poor a-Al1−xTix phase observed for NaAlH4 + xTiCl3 (x > 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. 28 at.% V. |
| first_indexed | 2025-11-14T09:41:50Z |
| format | Journal Article |
| id | curtin-20.500.11937-49728 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:41:50Z |
| publishDate | 2012 |
| publisher | Elsevier B.V. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-497282018-05-02T07:40:36Z Amorphous Al1-xTix, Al1-xVx, and Al1-xFex phases in the hydrogen cycled TiCl3, VCl3 and FeCl3 enhanced NaAlH4 systems Pitt, M. Vullum, P. Sørby, M. Emerich, H. Paskevicius, Mark Buckley, Craig Gray, E. Walmsley, J. Holmestad, R. Hauback, B. Amorphous materials Transmission electron microscopy (TEM) Synchrotron radiation Transition metal alloys and compounds Metal hydrides The twice hydrogen (H) cycled planetary milled (PM) and cryo milled (CM) NaAlH4 + xTMCl3 (transition metal (TM) = Ti, V, Fe) systems (x > 0.1) have been studied by high resolution synchrotron X-ray diffraction, and high resolution transmission electron microscopy (TEM). Intense primary amorphous (a-) Al1−xTMx halos are evident in diffraction data of PM samples for V and Fe, and in CM samples for Ti, V, and Fe. Weaker primary amorphous Al1−xTix halos are evident in PM samples for Ti. The Ti poor a-Al1−xTix phase observed for NaAlH4 + xTiCl3 (x > 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. 28 at.% V. 2012 Journal Article http://hdl.handle.net/20.500.11937/49728 10.1016/j.jallcom.2012.01.062 Elsevier B.V. restricted |
| spellingShingle | Amorphous materials Transmission electron microscopy (TEM) Synchrotron radiation Transition metal alloys and compounds Metal hydrides Pitt, M. Vullum, P. Sørby, M. Emerich, H. Paskevicius, Mark Buckley, Craig Gray, E. Walmsley, J. Holmestad, R. Hauback, B. Amorphous Al1-xTix, Al1-xVx, and Al1-xFex phases in the hydrogen cycled TiCl3, VCl3 and FeCl3 enhanced NaAlH4 systems |
| title | Amorphous Al1-xTix, Al1-xVx, and Al1-xFex phases in the hydrogen cycled TiCl3, VCl3 and FeCl3 enhanced NaAlH4 systems |
| title_full | Amorphous Al1-xTix, Al1-xVx, and Al1-xFex phases in the hydrogen cycled TiCl3, VCl3 and FeCl3 enhanced NaAlH4 systems |
| title_fullStr | Amorphous Al1-xTix, Al1-xVx, and Al1-xFex phases in the hydrogen cycled TiCl3, VCl3 and FeCl3 enhanced NaAlH4 systems |
| title_full_unstemmed | Amorphous Al1-xTix, Al1-xVx, and Al1-xFex phases in the hydrogen cycled TiCl3, VCl3 and FeCl3 enhanced NaAlH4 systems |
| title_short | Amorphous Al1-xTix, Al1-xVx, and Al1-xFex phases in the hydrogen cycled TiCl3, VCl3 and FeCl3 enhanced NaAlH4 systems |
| title_sort | amorphous al1-xtix, al1-xvx, and al1-xfex phases in the hydrogen cycled ticl3, vcl3 and fecl3 enhanced naalh4 systems |
| topic | Amorphous materials Transmission electron microscopy (TEM) Synchrotron radiation Transition metal alloys and compounds Metal hydrides |
| url | http://hdl.handle.net/20.500.11937/49728 |