Positron Annihilation in Metals Defected by Action of the Tensile Force

• Authors: W. Rudzińska , J. Pająk , M. Szuszkiewicz , G. Bujnarowski , A. Kluza
• Languages of publication: EN

Abstracts

EN

Results of experimental investigations of uniaxially elongated mono- and polycrystalline samples of several metals (Fe, Ta, Pd, Ag, and Au), performed using the positron annihilation methods, are reviewed. The dependences of the S-parameters and positron lifetimes on the relative elongation of the samples were presented. The data obtained for polycrystalline samples indicate that in the proportionality and limited proportionality regions the changes in the physical properties are governed mainly by generation of vacancies and by kinetics of formation and transformations of vacancy clusters occurring first of all on the grain boundaries of monocrystallites. In the region of plastic deformations the dominant defects are dislocations and vacancies and their aggregates generated due to the formation and movement of the dislocations of the primary and secondary slip. In the case of monocrystalline samples it was found that the dynamics of the dislocations and vacancy generation during the sliding of some crystallographic planes depends on the crystallographic direction.

Keywords

EN

78.70.Bj

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 110
• Issue: 5
• Pages: 691-699

Dates

published

2006-11

received

2006-06-05

Contributors

author

W. Rudzińska

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

J. Pająk

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

M. Szuszkiewicz

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

G. Bujnarowski

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

author

A. Kluza

• Institute of Physics, Opole University, Oleska 48, 45-052 Opole, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.110.691