Accession Number : AD0698357

Title :   THE THERMAL CONDUCTIVITY AND TOTAL EMITTANCE OF TUNGSTEN AT 1800 TO 2800K.

Descriptive Note : Technical rept. 1 Sep 67-30 Jun 68,

Corporate Author : CINCINNATI UNIV OHIO MATERIALS SCIENCE PROGRAM

Personal Author(s) : Jun,C. K. ; Ebrahim,Salman ; Hoch,M.

Report Date : OCT 1969

Pagination or Media Count : 52

Abstract : The thermal conductivities and total emittances of six tungsten samples prepared by different manufacturers using either arc-cast methods or powder metallurgy techniques were measured in the temperature range 2000 - 2800K. The thermal conductivity of commercially prepared arc-cast samples is slightly higher than the thermal conductivity of commercially prepared powder metallurgy samples. In both cases the thermal conductivity is independent of temperature. The total emittance at 2500K for the powder metallurgy samples is 0.25 and 0.29 for the arc-cast samples. The specially prepared materials have thermal conductivities and emittances which are different from the conductivity and emittance of commercially available materials. (Author)

Descriptors :   (*HIGH TEMPERATURE, TUNGSTEN), (*TUNGSTEN, PHYSICAL PROPERTIES), THERMAL CONDUCTIVITY, EMISSIVITY, CASTINGS, POWDER METALLURGY, CONDUCTION(HEAT TRANSFER), TRANSPORT PROPERTIES, DETERMINATION, TEST EQUIPMENT, ERRORS, SPECIAL FUNCTIONS(MATHEMATICAL), STANDARDS

Subject Categories : Metallurgy and Metallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE