Accession Number : AD0285106

Title :   CERAMIC-METAL SEALS FOR HIGH-POWER TUBES

Corporate Author : ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y

Personal Author(s) : JOHNSON,C. ; WARASKA,I. ; CHEATHAM,E.

Report Date : JUN 1962

Pagination or Media Count : 1

Abstract : Study was continued on ceramic-to-metal seals for high-power tubes. Test results were recorded for 1425 C, 1500 C, and 1575 C sintering and for 4-, 6-, and 8-hour temperature cycles. There does not appear to be a systematic increase in averages with an increase in temperature, nor does any temperature cycle show definitive results. Investigations are in progress to correlate eccentricity of the alves of test samples with changes in tensile strength. A modified nonpumping ion gage was designed which is expected to eliminate sputtering. Sixty ceramic-to-metal assemblies of a typical window design were made, with a yield of 83% being vacuum-tight. The leakers are undergoing analysis. (Author)

Descriptors :   *ELECTRON TUBES, *METAL SEALS, BRAZING, CERAMIC MATERIALS, CHEMICAL MILLING, IONIZATION GAGES, LIFE EXPECTANCY, MANUFACTURING, METALS, PROCESSING, SINTERING, TENSILE PROPERTIES, TESTS

Distribution Statement : APPROVED FOR PUBLIC RELEASE