Thermodynamic and Kinetic Properties of Grain-Boundary Ridges on Tilt \([11\bar 20]\) Grain Boundaries in Zinc

Resumo

Thermodynamic and kinetic properties characteristic of grain-boundary ridges on tilt \([11\bar 20]\) grain boundaries in zinc are studied experimentally. Temperatures are determined for faceting–defaceting and roughening phase transitions in grain-boundary ridges for tilt \([11\bar 20]\) grain boundaries with 35°, 57°, and 85° angles of misorientation. Mobilities and enthalpies of activation are obtained for grain-boundary ridges on the same boundaries. Parameters of inhibition are also calculated for grain-boundary ridges, according to the observed shapes of grain-boundary loops.