Technical Physics Letters
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Sublimation of tungsten on a spiral heater
Supelnyak S.I.
1, Baskakov E.B.
1, Kosushkin V.G.
1, Palladin A.E.1
1"Space Materials Science Laboratory - Kaluga" of the Kurchatov Complex of Crystallography and Photonics, National Research Center "Kurchatov Institute", Kaluga, Russia
Email: Supelnyak_SI@nrcki.ru
The analysis of the tungsten sublimation process in a thermal unit with a spiral-shaped heater at a temperature of 1200-1720 K. A process model in the COMSOL MULTIPHYSICS system has been developed to evaluate thermal conditions. The formation of tungsten microcrystals in the regions of the spiral with a lower temperature has been established. Carbon inclusions in the surface of the spiral were noted, the source of which was the oils sorbed in the pores of the wire during its production by drawing. Keywords: tungsten spiral, sublimation recrystallization, thermal process model.
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