Fabrication of Porous Tantalum and Tungsten Black Coatings for Artificial Earth Satellites

Coatings are fabricated using plasma-ion sputtering and codeposition of ultradispersed Ta and Cd particles and Nb- and Mo-doped W and Cd particles. The fabricated coatings consist of a mixture of crystallized cadmium and the amorphized refractory metals. Subjecting the coatings to thermal annealing...

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Bibliographic Details
Published in:Technical physics letters 2020-04, Vol.46 (4), p.319-322
Main Authors: Tuleushev, Yu. Zh, Volodin, V. N., Zhakanbaev, E. A., Suslov, E. E., Kerimshe, A. S.
Format: Article
Language:English
Subjects:
Amorphization
Cadmium
Cellular structure
Classical and Continuum Physics
Coatings
Codeposition
Crystallization
Electric contacts
Electromagnetic absorption
Molybdenum
Niobium
Physics
Physics and Astronomy
Refractory metals
Tantalum
Tungsten
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Summary:Coatings are fabricated using plasma-ion sputtering and codeposition of ultradispersed Ta and Cd particles and Nb- and Mo-doped W and Cd particles. The fabricated coatings consist of a mixture of crystallized cadmium and the amorphized refractory metals. Subjecting the coatings to thermal annealing in vacuum at 800°C for 1 h results in complete evaporation of cadmium from the coatings and the formation of cellular structures, their light-absorbing capacity depending on doping with Nb and Mo. The Nb-doped tantalum coatings and Nb- and Mo-doped tungsten coatings exhibit the highest light absorption. The electrical resistance of fabricated black coatings is sufficient to drain static charge accumulating due to contact with near-Earth plasma.
ISSN:1063-7850
1090-6533
DOI:10.1134/S1063785020040148