Sublimation of tungsten on a spiral heater

S. I. Supelnyak, E. B. Baskakov, V. G. Kosushkin, A. E. Palladin

Laboratory of Space Materials Science-Kaluga" Kurchatov Institute of Crystallography and Photonics "Kurchatov Institute", Kaluga, Russia

Abstract: 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.

Received: 11.08.2025
Revised: 29.09.2025
Accepted: 29.09.2025

DOI: 10.61011/PJTF.2026.03.62179.20465

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