Observation of precipitation in Mg-Al alloys by <sup>25</sup>Mg and <sup>27</sup>Al NMR
T J Bastow; M E Smith; T J Bastow; Div. of Mater. Sci. & Technol., CSIRO, Clayton, Vic., Australia; M E Smith; Div. of Mater. Sci. & Technol., CSIRO, Clayton, Vic., Australia
Журнал:
Journal of Physics: Condensed Matter
Дата:
1995-06-19
Аннотация:
A combination of <sup>25</sup>Mg and <sup>27</sup>Al NMR has been shown to be an effective structural probe for the intermetallic phase Mg<sub>17</sub>Al<sub>12</sub>, able to detect precipitation of this phase in dilute alloys of aluminium in magnesium during age hardening, with well-resolved signals from the precipitate and the alloy. Knight shift and spin-lattice relaxation measurements for the intermetallic phase are examined for evidence of a quasigap at the Fermi surface, recently proposed as the origin for the stability of this phase.
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