Accession Number : AD0739902

Title :   The Study of Basal Dislocations in Sapphire.

Descriptive Note : Technical rept.,

Corporate Author : ARMY MATERIALS AND MECHANICS RESEARCH CENTER WATERTOWN MASS

Personal Author(s) : Caslavsky,Jaroslav L. ; Gazzara,Charles P. ; Middleton,Raymond M.

Report Date : DEC 1971

Pagination or Media Count : 14

Abstract : An analysis of the Burgers vectors of dislocations in sapphire, revealed by X-ray transmission topography, confirmed the existence of the Burgers vectors parallel to the <(2)(-1)(-1)(0)> directions. Experimental evidence for the magnitude of the Burgers vectors is given. Numerous dislocation reactions of the type <(2)(-1)(-1)(0)> + <(-1)(2)(-1)(0)> + <(-1)(-1)(2)(0)> = 0 are verified. (Author)

Descriptors :   (*DISLOCATIONS, *SAPPHIRE), SINGLE CRYSTALS, TWINNING(CRYSTALLOGRAPHY), X RAY DIFFRACTION

Subject Categories : Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE