Journal
MATERIALS LETTERS
Volume 59, Issue 10, Pages 1138-1141Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2004.09.055
Keywords
tungsten; La2O3; nanostructured material; thermionic cathode
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Nanostructured W-La2O3 electrode materials with a high content of La2O3 have been prepared by mechanical alloying (MA) and hot pressing and sintering (HPS). An investigation has been made on operation characteristics for nanostructured W-La2O3 cathodes. The service lifetime of the nanostructured W-La2O3 cathode is longer than that of commercially used W-2 wt.% La2O3 cathodes. These operation characteristics depend on the content of the rare-earth oxide. Specially, the content of La2O3 governs resistance to arc erosion of the electrodes. (C) 2004 Elsevier B.V All rights reserved.
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