Accession Number : AD0605182

Title :   PRODUCTION ENGINEERING MEASURE FOR BERYLLIUM OXIDE AND PARTS PRODUCED FROM IMPORTED ORES.

Descriptive Note : Quarterly progress rept. no. 3, 1 Jan-31 Mar 64,

Corporate Author : BERYLLIUM CORP READING PA

Personal Author(s) : Blum,J. F. ; Wambold,J. N.

Report Date : 31 MAR 1964

Pagination or Media Count : 2

Abstract : Pilot plant studies show that a uniform beryllium oxide powder is produced by calcination of beryllium sulfate crystals, even though conditions are varied from run to run beyond normal production calcination operating limits. Dry blending, as an alternate process to the wet ball milling technique, was evaluated and found to produce parts with non-homogeneous and unsatisfactory sintered density. Pits were prevalent throughout the body. Grade I and Grade V BeO were found to react similarly during dry blending and subseqqesbsequent cold pressing and sintering. Extrusion process improvement was initiated, and a die with various size inserts is now available. The strength of the bond developed between the basic molybdenum-manganese metallizing layer and a 99% BeO body was evaluated and improved by altering the composition of the metallizing mixture. The tensile strength of the improved metal-BeO bond approaches 10,000 p.s.i. (Author)

Descriptors :   (*BERYLLIUM OXIDES, ELECTRONIC EQUIPMENT), (*ELECTRONIC EQUIPMENT, PRODUCTION), POWDERS, ORES(METAL SOURCES), SULFATES, HYDRATES, CRYSTALS, HEAT TREATMENT, SINTERING, POWDER METALLURGY, EXTRUSION, BONDING, MATERIAL FORMING, MOLYBDENUM ALLOYS, MANGANESE ALLOYS, METAL COATINGS, TENSILE PROPERTIES, MIXTURES

Distribution Statement : APPROVED FOR PUBLIC RELEASE