Accession Number:

AD0296458

Title:

UNIFORM WORK FUNCTION CATHODE STUDIES FOR THERMIONIC CONVERTERS

Descriptive Note:

Quarterly rept. no. 2

Corporate Author:

ATOMICS INTERNATIONAL CANOGA PARK CA

Personal Author(s):

Report Date:

1963-01-01

Pagination or Media Count:

47.0

Abstract:

Chemical vapor deposition techniques are being studied as a possible means of producing nonplanar thermionic cathodes having a high degree of uniformity of work function. Vapor deposited molybdenum coatings have been produced by chemical reduction of molybdenum hexafluoride pyrolysis of molybdenum hexacarbonyl and pyrolysis of molybdenum pentachloride. Plating conditions were varied for each process to determine the effect of plating conditions on the preferred orientations of crystallographic planes parallel to the plating surfaces. Both 100 and 111 preferred orientations have been found for the hexafluoride reductions. The pentachloride samples have strong 100 orientations. The hexacarbonyl samples apparently are not pure molybdenum and do not have the expected molybdenum diffraction pattern.

Subject Categories:

  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE