Impregnated cathode surface investigations by SFM/STM and SEM/EDX
| Autor: | G. Gärtner, Detlef U. Wiechert, W. G. Hermann, C. Makovicka, A. Hardt |
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| Rok vydání: | 1997 |
| Předmět: |
Materials science
Resolution (electron density) Energy-dispersive X-ray spectroscopy Analytical chemistry General Physics and Astronomy chemistry.chemical_element Surfaces and Interfaces General Chemistry Hot cathode Tungsten Condensed Matter Physics Microstructure Cathode Surfaces Coatings and Films law.invention chemistry law Microscopy Porosity |
| Zdroj: | Applied Surface Science. 111:70-75 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/s0169-4332(96)00725-8 |
| Popis: | The surfaces of 411-impregnated S-cathodes have been investigated by SFM/STM (= scanning force microscopy and scanning tunnelling microscopy) and SEM/EDX. The S-cathodes of different origin consist of a tungsten matrix (20% porosity) and are impregnated with 4BaO · CaO · Al 2 O 3 (abbreviation: WI-cathodes). Surface structure and topography and elemental constituents of the partly contaminated tungsten surface have been identified. A comparison between non-activated and activated WI-cathodes is given. The specific advantages and the resolution limits of both characterization tools are discussed. |
| Databáze: | OpenAIRE |
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