Impregnation of High Purity Ba-Ca Aluminate on a Porous Tungsten Matrix Obtained from W-Cu Composite for TWT Thermionic Cathodes

Autor(es)

Sene, Frank F. ; Mancini, Victor A. ; Santos, Vinicius O. ; Motta, Claudio C. ; IEEE

• Tipo de documento: Artigo Científico
• Fonte: 2013 IEEE 14TH INTERNATIONAL VACUUM ELECTRONICS CONFERENCE (IVEC); v. N/A, p. 2-pg., 2013-01-01.

Resumo

Impregnated thermionic cathodes production was the main objective of this work. The W-30wt.% Cu composite was sintered by induction heating (1200 degrees C). The porous matrix was obtained after decopperization (1600 degrees C). High purity Ba- Ca aluminate was impregnated (1630 degrees C). The amount of aluminate impregnated was 18.32wt.%. Microstructure, porosity, and particle sizes distribution were determined. (AU)

• Processo FAPESP: 12/02941-4 - 13th International Vacuum Electronics Conference and Ninth International Vacuum Electron Sources Conference
• Beneficiário: Frank Ferrer Sene
• Modalidade de apoio: Auxílio à Pesquisa - Reunião - Exterior