Abstract
Transient electrical effects of plastic deformation in NaCI crystals have been investigated. Two such effects have been observed: (1) a temporary increase in the ionic conductivity and (2) a deformation-induced charge flow with no applied electric field. The first effect, which is observable for about an hour at room temperature, is attributed to excess vacancies freed by moving dislocations. It is suggested that an important source of these vacancies may be the breaking-up by the deformation of associated complexes between cation vacancies and multivalent cation impurities. The second effect is observed only after inhomogeneous plastic deformation, and it ceases abruptly when the stress increment producing it is removed. Possible sources for this deformation-induced charge flow are discussed, and an explanation is offered in terms of electrically charged dislocations.
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