Positron Annihilation in Deformed and Hydrogenated Pd-23%atcu Alloy |
J. Pająka, R. Szatanika and M. Szuszkiewiczb a Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland b Institute of Experimental Physics, University of Wrocław, Pl. Maxa Borna 36, 50-205 Wrocław, Poland |
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Peak coincidence counting rate and positron lifetime spectra for deformed by cold-rolling, and annealed by four hours in the temperature 973 K, hydrogen free and hydrogenated PdCu with 23% Cu samples, in the temperature range from room temperature to about 720 K were measured. It was found that hydrogen improved to tempered samples creates defects that are annealed to the temperature about 525 K. In the cold-rolled up to deformation degree of 50% samples, hydrogen is trapped at defects, probably vacancies, forming H-V complexes, that become disappearing in the vicinity of the temperature at 350 K. |
DOI: 10.12693/APhysPolA.95.637 PACS numbers: 78.70.Bj |