Accession Number : AD0675990

Title :   CHEMICAL COMPATIBILITY OF NICKEL AND MOLYBDENUM FIBERS WITH BERYLLIUM.

Descriptive Note : Rept. for Nov 66-Sep 67,

Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s) : Watts,Curtis R.

Report Date : APR 1968

Pagination or Media Count : 23

Abstract : The feasibility of producing composites containing nickel or molybdenum fibers in a beryllium matrix was investigated. The composites studied were fabricated by powder metallurgical techniques. The 1-mil-diam nickel fibers reacted completely below 900C, converting the fibers from nickel to Ni5Be21. As the hot-pressing temperature was raised above 1100C, the nickel diffused outward from the beryllide fibers. The solid solubility of nickel in beryllium was about 20 wt% at the 1100C pressing temperature at the zone-fiber interface. The 1.5-mil-diam molybdenum fibers showed no evidence of reaction and little evidence of diffusion after pressing at 900C. Between 1000 and 1050C pressing conditions, the fibers began to react, producing layers of MoBe2 and MoBe12, respectively, surrounding the molybdenum core. The structure remained the same at 1100C with no evidence of solid solubility of the molybdenum in the beryllium or vice versa. (Author)

Descriptors :   (*BERYLLIUM, COMPATIBILITY), (*COMPOSITE MATERIALS, BERYLLIUM), NICKEL, MOLYBDENUM, FIBERS, REINFORCING MATERIALS, POWDER METALLURGY, HOT PRESSING, FEASIBILITY STUDIES, PHASE DIAGRAMS, SOLUBILITY

Subject Categories : Laminates and Composite Materials
      Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE