Accession Number : AD0715941

Title :   Growth of Sapphire Single Crystals Transparent Armor by a Modified Verneuil Technique.

Descriptive Note : Final rept.,

Corporate Author : LITTLE (ARTHUR D) INC CAMBRIDGE MASS

Personal Author(s) : Haggerty,John S. ; Rossetti,Michael

Report Date : OCT 1970

Pagination or Media Count : 38

Abstract : The objective of the process development program was to determine whether it was feasible to produce slab shaped sapphire single crystals by a modified Verneuil technique for transparent armor applications. Seeded single crystals of sapphire were grown with widths in excess of 2 1/2 inches, lengths in excess of 2 1/2 inches and thicknesses of 3/8 inch (program goals). It was clearly demonstrated that controlled growth of high-aspect-ratio oxide single crystals by the 'strip' Verneuil technique is feasible. An engineering cost analysis indicated that 8 inch by 1/4 inch sapphire windows could be produced at an approximate cost of $60 per pound provided reasonable yields of crack-free single crystals could be achieved. (Author)

Descriptors :   (*ARMOR, *TRANSPARENT PANELS), (*SAPPHIRE, ARMOR PLATE), (*CRYSTAL GROWTH, SAPPHIRE), SINGLE CRYSTALS, FEASIBILITY STUDIES

Subject Categories : Armor
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE