Accession Number : AD0714227

Title :   Grain Boundary Faceting of <10-10> Tilt Boundaries in Zinc.

Descriptive Note : Technical rept.,

Corporate Author : ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS

Personal Author(s) : Bishop,George H. , Jr. ; Hartt,William H. , III ; Bruggeman,Gordon A.

Report Date : SEP 1970

Pagination or Media Count : 29

Abstract : Faceted high-angle tilt grain boundaries have been observed in <10-10> zinc bicrystals and tricrystals grown from the melt. Faceting occurs over a 5-1/2 degrees range of misorientations for tilt angles between 31 and 36.5 degrees. The facets, which are asymmetric <10-10> tilt boundaries, are singular interfaces corresponding to energy cusps in the gamma-plot of grain boundary energy versus the inclination of the boundary surface. Limiting values of the depth of the energy cusps giving rise to the facets, and of the surface torques acting on the facets, are presented. The conditions for, and the mechanisms of facet formation are discussed. (Author)

Descriptors :   (*GRAIN BOUNDARIES, *ZINC), CRYSTAL GROWTH, GRAIN STRUCTURES(METALLURGY), INTERFACES, IMPURITIES

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE