Accession Number:

AD0274654

Title:

CARBONIZATION OF PLASTICS AND REFRACTORY MATERIALS RESEARCH PROGRAM. VOLUME II. REFRACTORY MATERIALS RESEARCH

Descriptive Note:

Corporate Author:

GENERAL ELECTRIC CO CINCINNATI OHIO

Personal Author(s):

Report Date:

1962-03-31

Pagination or Media Count:

1.0

Abstract:

Equilibrium N pressures over the ZrN single phase were measured by deter ining the rate of N effusion from a Knudsen cell. The measurements span a range from 1424 to 2360 K, a range of composition from 13.0 down to 9.79 N by weight and a range of N pressures from 2 x 10 to the -8th power to 3 x 10 to the -5th power atm. These data are presented graphically. Both IR and visible spectra were obtained from matrix isolated species effusion from a Knudsen orifice in a cell containing ThO2. The observed bands are tabulated the analysis of the spectra are not complete. Results of efforts to measure the resonance line absorption by B atoms over pure B indicated serious interacti n of the B with all container material t us far investigated. The 6 compounds, NbB2, TiB2, ZrB2, TaN, ZrN and HfN, for which emissivities are being measured, have been characterized by chemical analysis, density measurement, crystallographic structure, electron micrographic examination and x-ray diffraction measurements. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE