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Nucleation of Cracks in CdS during Ultrasonic Treatment
Author(s) -
Bušujeva G. V.,
Gricaenko I. G.,
Zinenkova G. M.,
Klimm D.,
Paufler P.,
Tjapuni. A.
Publication year - 1995
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170300420
Subject(s) - nucleation , materials science , annealing (glass) , dislocation , ultrasonic sensor , crystallographic defect , amplitude , vibration , condensed matter physics , diffusion , composite material , crystallography , thermodynamics , chemistry , optics , acoustics , physics
High amplitude ultrasonic vibrations with frequencies f r ∼ 90 kHz and vibration amplitudes ε ⩽ 3.4. 10 −4 were used to obtain oscillatory stresses σ ⩽ 14 MPa in CdS single crystals. Such treatment leads to the nucleation of cracks in annealed samples and to the formation of dislocations in as‐grown samples. The different behaviour can be explained by the reduction of the free dislocation segment lengths due to the diffusion of point defects towards the dislocation lines during the annealing treatment.