ABSTRACT
Crystals of the NaCl structure are known to slip on a number of different planes, all in <110> direction, depending on ionicity of bonding, orientation, temperature, doping and other parameters. The CRSS plotted as a function of temperature for given doping and strain rate shows a complicated behaviour consisting of at least four stages [1]. The low temperature stage is the one least depending on doping and has been assigned to the Peierls mechanism on account of its small activation volume. This paper reports on measurements of the CRSS in this regime on a variety of materials and orientations and tries to rationalize the stresses obtained in terms of the core structure of edge dislocations on particular slip planes.
