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- Title
Heat–Field Treatment of Tips Made of Tungsten–Hafnium Alloy.
- Authors
Golubev, O. L.; Shrednik, V. N.
- Abstract
The combined effect of a high electric field and a high temperature on the morphology of W-Hf field-emission tips is studied. It is shown that, while the tip reconfiguration stages for this alloy are basically the same as for pure tungsten, they have a number of specific features due to the surface segregation of hafnium. The heat-field treatment of these emitters narrows the solid angle of emission significantly, improves the emissivity of the tips, and is accompanied by the high-temperature evaporation primarily of Hf atoms.
- Subjects
TUNGSTEN alloys; ELECTRIC fields; HEAT treatment of metals
- Publication
Technical Physics, 2003, Vol 48, Issue 6, p776
- ISSN
1063-7842
- Publication type
Article
- DOI
10.1134/1.1583834