Accession Number : AD0432903


Title :   USE OF REACTIVE ATMOSPHERES FOR THE TREATMENT OF B.C.C. METALS.


Descriptive Note : Quarterly engineering progress rept. no. 4 and 5, 1 Jul-31 Dec 63,


Corporate Author : BATTERSEA COLL OF TECHNOLOGY LONDON (ENGLAND)


Personal Author(s) : Samuel,R L ; Lockington,N A ; Toth,I J


Report Date : Dec 1963


Pagination or Media Count : 20


Abstract : The activated sintering experiments on tungsten powder compacts were continued, using high frequency induction heating. Comparative tests showed that bromine increases the rate of densification in the temperature range 1200 to 1800 C, but high densities were not achieved. The graph of density plotted against sintering temperature indicates that activation may not occur, or may diminish, outside this temperature range. There is no time limitation. Fracture stress, measured by a miniature bend test, showed correlation with density for short sintering treatments; longer treatments gave anomalous results. (Author)


Descriptors :   *TUNGSTEN , *CONTROLLED ATMOSPHERES , POWDER METALS , SINTERING , BROMINE , GASES , ARGON , HYDROGEN , INDUCTION HEATING , HIGH FREQUENCY , DENSITY , MEASUREMENT , HIGH TEMPERATURE , SCIENTIFIC RESEARCH , TUNGSTEN COMPOUNDS , BROMIDES , CHLORIDES , TEMPERATURE , POWDER METALLURGY


Distribution Statement : APPROVED FOR PUBLIC RELEASE