Studies of the Interface of Oxide Coated Cathodes

Abstract

X-ray diffraction patterns are presented as evidence for the existence of a crystalline ``interface'' compound between the base metal and the coating of the oxide coated cathode. Measurements of the coating resistance to microsecond pulse currents, made with imbedded probes, indicate the presence of an anomalous ``interface'' resistance between the metal and coating. The relative magnitude of the coating and interface resistances are shown as a function of current for various operating temperatures.