The Kinetics and Thermodynamics of Deformation Twin Grain Boundaries in Zn

摘要

The paper presents experimental data on the motion of incoherent grain boundaries in Zn. The twin grain boundaries in Zn can be envisioned as the [1120] tilt grain boundaries with angle of misorientation 86°. The surface of coherent twin boundaries in Zn is (0112). The mobility of incoherent twin boundaries in Zn of different purity by observation in situ was measured. It was found that kinetic parameters of incoherent grain boundaries are varied through a definite range. The activation and activation-less motion of incoherent boundaries were observed. The surface tension of coherent grain boundary was estimated. Namely, the estimation gives that surface tension of coherent grain boundary approximately in three order of magnitude smaller than this one for high-angle grain boundary.