Accession Number : AD0658224

Title :   THERMO-DIFFUSION IN THE TUNGSTEN-BERYLLIUM SYSTEM,

Corporate Author : REDSTONE SCIENTIFIC INFORMATION CENTER REDSTONE ARSENAL ALA TRANSLATION BRANCH

Personal Author(s) : Arzhanyi,P. M. ; Volkova,R. M. ; Prokoshkin,D. A.

Report Date : JUL 1967

Pagination or Media Count : 14

Abstract : An investigation was conducted on the surface alloying of tungsten by various elements separately and in combinations. It was found that beryllium and tungsten diffusion at 1000-1200C proceeds with a front with a simultaneous formation of a number of intermetallic phases of various thickness. The phases are separated between themselves while their boundaries correspond to steps in the concentration curve. The temperature dependences of the diffusion coefficients have been obtained for each phase. By means of X-ray and X-ray spectral analysis the structure and the phase composition of the diffusion layer have been studied. Beryllides of tungsten of the following stochiometric composition have been established: WBe24, WBe12, WBe2. The crystal structures of these phases have also been established. (Author)

Descriptors :   (*TUNGSTEN ALLOYS, *BERYLLIUM ALLOYS), USSR, PHASE STUDIES, DIFFUSION, MICROSTRUCTURE, INTERMETALLIC COMPOUNDS, REACTION KINETICS

Subject Categories : Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE