Modelling of hydrogen thermal desorption spectrum in nonlinear dynamical boundary-value problem

18th International Conference PhysicA.SPb

Kostikova, E.K.^1 ; Zaika, Yu.V.^1

Institute of Applied Mathematical Research, Karelian Research Centre, Russian Academy of Science, 11 Pushkinskaya street, Petrozavodsk

185910, Russia^1

关键词: Experimental methods;    Hydrogen isotope;    Hydrogen permeability;    Ordinary differential equation (ODE);    Technological challenges;    Thermal desorption spectra;    Thermal desorption spectrometry;    Transfer parameters;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/769/1/012024/pdf
DOI  :  10.1088/1742-6596/769/1/012024

来源: IOP

【 摘 要 】

One of the technological challenges for hydrogen materials science (including the ITER project) is the currently active search for structural materials with various potential applications that will have predetermined limits of hydrogen permeability. One of the experimental methods is thermal desorption spectrometry (TDS). A hydrogen-saturated sample is degassed under vacuum and monotone heating. The desorption flux is measured by mass spectrometer to determine the character of interactions of hydrogen isotopes with the solid. We are interested in such transfer parameters as the coefficients of diffusion, dissolution, desorption. The paper presents a distributed boundary-value problem of thermal desorption and a numerical method for TDS spectrum simulation, where only integration of a nonlinear system of low order (compared with, e.g., the method of lines) ordinary differential equations (ODE) is required. This work is supported by the Russian Foundation for Basic Research (project 15-01-00744).