Study of Grain Boundary Motion in Ice Bicrystals

C. L. DI PRINZIO; NASELLO, OLGA BEATRIZ

JOURNAL OF PHYSICAL CHEMISTRY B - (Print)

AMER CHEMICAL SOC

Lugar: Washington; Año: 1997 vol. 101 p. 7687 - 7690

1520-6106

The motion of 101̄0/θ ice grain boundaries is studied using the ?Sun−Bauer? technique. The samples were annealed at temperatures between −2 °C and −20 °C, for times up to 1400 h, and Mγ values for mixed and tilt boundaries were determined (M and γ are the mobility and the excess of free energy per unit area of the grain boundary, respectively). For each rotation angle θ and annealing temperature, a large scattering is found in Mγ values. This scattering is related to the dependence of migration on grain boundary inclination. The obtained results are specially analyzed taking into account CSL concepts and grain boundary migration in anisotropic materials.