Accession Number : AD0607530

Title :   COATED REFRACTORY METAL EMITTANCE SPECIMENS.

Descriptive Note : Rept. for 1 May 63-29 Feb 64,

Corporate Author : AMERICAN MACHINE AND FOUNDRY CO ALEXANDRIA VA ALEXANDRIA DIV

Personal Author(s) : Leavenworth,H. W. ,Jr. ; Schatz,E. A. ; Browning,M. E. ; Dunkerley,F. J.

Report Date : AUG 1964

Pagination or Media Count : 78

Abstract : Four columbium base alloys were coated with oxidation resistance coatings by four different industrial organiza tions and submitted to the American Machine and Foundry Company for measurement of thermal radiation and other general physical properties at 1520F. Basic acceptance data obtained for these four coated-columbium base alloys included photomicrographs of the coatings before and after a six (6) hour stability test, physical observation of the stability of the coatings at 2500F at hourly intervals to a maximum of six (6) hours, surface roughness measurements, and such thermal optical data as total normal emittance, spectral emittance and spectral reflectance. Companion specimens of the four columbium alloys coated by the four different organizations were submitted to the Materials Applications Division of RTD for their in-house thermal radiation physical property studies. (Author)

Descriptors :   (*REFRACTORY METAL ALLOYS, COATINGS), (*COATINGS, REFRACTORY METAL ALLOYS), THERMAL RADIATION, EMISSIVITY, SURFACE PROPERTIES, STABILITY, NIOBIUM ALLOYS, TUNGSTEN ALLOYS, ZIRCONIUM ALLOYS, CARBON ALLOYS, TANTALUM ALLOYS, VANADIUM ALLOYS, MOLYBDENUM ALLOYS, SILICON COATINGS, SILICIDES, CHROMIUM, DIFFUSION, ALUMINUM, BORON, SPECTROGRAPHY, CHEMICAL ANALYSIS, OXIDATION, REFRACTORY COATINGS, REFLECTION, PHOTOMICROGRAPHY, REENTRY VEHICLES, THERMAL PROPERTIES

Distribution Statement : APPROVED FOR PUBLIC RELEASE