Abstract
| Lingua originale | English |
|---|---|
| Numero di pagine | 4 |
| Rivista | Journal of Physics and Chemistry of Solids |
| Volume | 2010 |
| Stato di pubblicazione | Published - 2010 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
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Large atomic disorder in nanostructured LaNi5 alloys: A La L3-edge extended X-ray absorption fine structure study. / Schiavo, Benedetto; Saini; Schiavo; Iadecola; Cognigni; Olivi; Joseph.
In: Journal of Physics and Chemistry of Solids, Vol. 2010, 2010.Risultato della ricerca: Article
}
TY - JOUR
T1 - Large atomic disorder in nanostructured LaNi5 alloys: A La L3-edge extended X-ray absorption fine structure study
AU - Schiavo, Benedetto
AU - Saini, null
AU - Schiavo, null
AU - Iadecola, null
AU - Cognigni, null
AU - Olivi, null
AU - Joseph, null
PY - 2010
Y1 - 2010
N2 - Local structure of the nanostructured LaNi5 alloys, prepared by ball-milling, has been studied using La L3-edge extended X-ray absorption fine structure spectroscopy. The near-neighbor distances tend to decrease with the ball-milling, and the mean square relative displacements (MSRD) show substantial increase suggesting an increased atomic disorder. High temperature annealing helps in partial recovery of atomic order in the ball-milled samples for milling times upto 20 h, however, the long-time ball-milled samples seems to gain only a local random order. The results suggest that reduced unit-cell volume together with large atomic-disorder might be causing a higher energy-barrier for the hydride-phase formation in the long time ball-milled LaNi5 powders.
AB - Local structure of the nanostructured LaNi5 alloys, prepared by ball-milling, has been studied using La L3-edge extended X-ray absorption fine structure spectroscopy. The near-neighbor distances tend to decrease with the ball-milling, and the mean square relative displacements (MSRD) show substantial increase suggesting an increased atomic disorder. High temperature annealing helps in partial recovery of atomic order in the ball-milled samples for milling times upto 20 h, however, the long-time ball-milled samples seems to gain only a local random order. The results suggest that reduced unit-cell volume together with large atomic-disorder might be causing a higher energy-barrier for the hydride-phase formation in the long time ball-milled LaNi5 powders.
KW - Crystal structure
KW - EXAFS
KW - LaNi5 alloys
KW - Nanostructuring
UR - http://hdl.handle.net/10447/50145
M3 - Article
VL - 2010
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
SN - 0022-3697
ER -