G Dlubek et al 1992 J. Phys.: Condens. Matter 4 6317 doi:10.1088/0953-8984/4/29/015
G Dlubek, S Krause, H Krause, A L Beresina, V S Mikhalenkov and K V Chuistov
Positron lifetime measurements were used for studying decomposition during post-quench in situ annealing of binary Al-7.35 at.% Li and ternary Al-7.3 at.% Li-X (X=1.1 at.% Cu, 5.2 at.% Mg or 0.18 at.% Sc) alloys. A typical lifetime of 185+or-5 ps observed in Al-Li is attributed to coherent delta '(Al3Li) particles. In ternary alloys positrons show a strong response to the formation of semicoherent and incoherent phases such as T1(Al2LiCu) and Al2LiMg. Positron trapping in Al-Li-Sc is attributed to composite delta ' (Al3Li)/Al3Sc particles associated with vacancies. Quenched-in vacancies were detected in Al-Li-Sc and Al-Li-Mg but not in Al-Li-Cu and Al-Li.
78.70.Bj Positron annihilation
Issue 29 (20 July 1992)
G Dlubek et al 1992 J. Phys.: Condens. Matter 4 6317
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