Accession Number : AD0278807

Title :   INVESTIGATION OF THE EFFECTS OF PROCESSING VARIABLES AND FABRICATION TECHNIQUES UPON THE PROPERTIES OF INTERMETALLIC COMPOUNDS

Corporate Author : BRUSH BERYLLIUM CO CLEVELAND OHIO

Personal Author(s) : TRUESDALE,RICHARD S. ; LYMPANY,BYRON B.

Report Date : JUN 1962

Pagination or Media Count : 1

Abstract : Intermetallic compounds of NbBe12, Nb2Be17, Nb2Be19, and Ta2Be17 were fabricated by uniaxial pressing and sintering techniques. Results of sintering studies on Nb2Be17 are discussed. The effects of particle size, stoichiometry, temperature, and time upon the sintered density, grain size, and strength of Nb2Be17 are described. A modulus of rupture evaluation is made on Nb2Be17 up to 2750 F, and results of tensile, Young's modulus, thermal conductivity, and oxidation studies are discussed. The feasibility of scaling-up to large and complicated shapes by isostatic pressing, slip casting, extrusion, hot pressing, and flame spraying is demonstrated. The temperature-pressure-flow characteristics of several beryllides at temperatures of 2750 to 3050 F are evaluated together with microstructural stability. The metallurgical fabrication techniques of forging, forming, and rolling as applied to Nb2Be17 are examined. (Author)

Descriptors :   CASTING, DEFORMATION, EXTRUSION, FLAME SPRAYING, FORGING, MANUFACTURING, MECHANICAL PROPERTIES, METAL FORMING PRESSES, MICROSTRUCTURE, POWDER METALS, SINTERING, STABILITY, TANTALUM COMPOUNDS

Distribution Statement : APPROVED FOR PUBLIC RELEASE