Local site symmetry and electronic structure of trialuminide and related intermetallic alloys probed by solid-state NMR

and MAS NMR and multiple quantum studies of Ti-doped NaAlH4

“…These results clearly indicate the extremely different compounds which may result in solvent mixed samples, as opposed to mechanically milled samples, where the 27 Al MAS and static NMR studies show the presence of TiAl 3 . Finally, the 1 H MAS NMR and 1 H spin-lattice relaxation measurements (T 1 ) indicate the presence of TiH 2 in fully-reacted mechanically milled sample [26,27].…”

25Mg NMR site analysis in metals and intermetallics

“…Recent reports [1][2][3][4][5][6][7][8] have highlighted the valuable role that NMR has to play in the identification and quantitation of precipitate phases in lightweight aluminium and magnesium based alloys. Some of these phases, which are binary or ternary intermetallic compounds of the dilute alloying elements with the Al and Mg host, and present in the host lattice in concentrations of order or less than 1 mol%, have been identified by their 27 Al, 45 Sc and 63 Cu NMR spectra [5][6][7][8].…”

Clustering and formation of nano-precipitates in dilute aluminium and magnesium alloys

“…The sensitivity of 45 Sc NMR allows an accurate measurement of scandium solubility at the Al-rich end of the phase diagram [3]. The precipitate that forms on slow cooling from the melt in an ingot of Al(Sc) is the intermetallic phase Al 3 Sc [6]. The line is relatively narrow, consistent with the cubic coordination of Sc by Al in this structure.…”

“…After aging at 300 jC (Fig. 6a) for 2 h, an additional weak 45 Sc broad line centred at the Al 3 Sc shift [6]. Further aging at this temperature substantially increases the intensity of this line at the expense of the line for Sc in a-phase Al.…”