Accession Number : AD0742813

Title :   The Use of Single Crystals of Tungsten as High-Temperature Heaters of Long Cathodes,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Savitskii,E. M. ; Burkhanov,G. S. ; Petrachenkov,V. I. ; Timokhov,I. V. ; Raskatov,N. N.

Report Date : 08 FEB 1972

Pagination or Media Count : 14

Abstract : The first results of testing of single crystals of tungsten as a material for heaters of long cathodes in powerful electric vacuum devices showed that during the operation of the heaters under conditions of thermal cyclings their brittle rupture occurs. It has been established that cyclic temperature load gives rise to thermal fatigue of the heaters made from single crystals of tungsten; however, prolonged vacuum annealing makes it possible to delay the onset of thermal fatigue of the heaters and to ensure the necessary life of a cathode even under vibration and shock loads. (Author)

Descriptors :   (*ELECTRON TUBE HEATERS, TUNGSTEN), SINGLE CRYSTALS, CATHODES(ELECTRON TUBES), ANNEALING, FATIGUE(MECHANICS), THERMAL STRESSES, MICROSTRUCTURE, USSR

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE