Observations on an electrical effect obtained during deformation of sodium chloride crystals

Abstract

An electrical signal obtained during the plastic deformation of sodium chloride crystals is described. This effect is attributed to the movement of charged dislocations. During a first series of experiments the specimens were submitted to a cyclic deformation. The magnitude of the electrical effect was measured in function of the amplitude of deformation. The influence of annealing was also investigated. In a second series of experiments the crystals were deformed by a series of stress pulses. A tentative explanation for the shape of the obtained signal is given.