Title :
Development and characterization of the porous tungsten matrix obtaining process for dispenser thermionic cathode
Author :
Sene, Frank F. ; Silva, Artur G L ; Motta, Cláudio C.
Author_Institution :
Nucl. & Energy Res. Inst., Sao Paulo, Brazil
Abstract :
W-Cu composites were used as starter materials of the thermionic cathode matrices for microwave tubes. However the decopperization affects their microstructure. An apparatus and an experimental procedure were developed to reduce the damages introduced during the decopperization. The matrix porosity (34.6%) was analyzed by SEM and its composition was determined by EDX.
Keywords :
X-ray chemical analysis; composite materials; copper; microwave tubes; porous materials; scanning electron microscopy; thermionic cathodes; tungsten; EDX; SEM analysis; W-Cu; composite material; decopperization; dispenser thermionic cathode; matrix porosity; microstructure; microwave tube; porous tungsten matrix; Cathodes; Chemicals; Electromagnetic heating; Microstructure; Powders; Tungsten; Induction heating; decopperization; microstructure; porosity; thermionic cathode technology;
Conference_Titel :
Vacuum Electron Sources Conference (IVESC), 2012 IEEE Ninth International
Conference_Location :
Monterey, CA
Print_ISBN :
978-1-4673-0368-2
DOI :
10.1109/IVESC.2012.6264175
