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Hybrid model of hydrogen thermodesorption from structural materials
Zaika Yu. V.
1, Kostikova E. K.
1
1Karelian Research Centre of the Russian Academy of Sciences, Petrozavodsk, Russia
Email: zaika@krc.karelia.ru, kostikova@krc.karelia.ru
Thermodesorption spectrometry (TDS) is one of the effective methods for studying the interaction of structural materials with hydrogen isotopes. A thin plate made of a material with metallic properties is considered. The sample pre-saturated with dissolved hydrogen is slowly heated in a vacuum chamber. The degassing flux is recorded using a mass spectrometer. The TDS spectrum is the dependence of the desorption flux density on the current temperature is analysed. The paper presents a new hybrid model of thermodesorption, which operates with both volume-averaged concentrations and surface concentration. The dynamics of concentration is determined by nonlinear dynamic boundary conditions. Keywords: hydrogen thermodesorption, numerical modelling.
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