Kinetics of Hydrogen Desorption From Ni—In Composites, Synthesized by Electrochemical Method

ALLA ZVYAGINTSEVA

Abstract


The results of the study of the kinetics of the thermal desorption spectrum of deuterium accumulated with Ni64In36-Dx composites synthesized by the method of electrochemistry are presented. The limits of desorption temperatures for ionimplanted deuterium were determined depending on the implanted dose. The measured content of deuterium alloy is 4 at. D/at. Met (~8.7 wt. % D; ~4.6 wt. % hydrogen). The formation of the deuterium thermal desorption spectrum depends on the implantation dose. An increase in the content of implanted deuterium contributes to the formation of a solid solution of hydrogen isotope in the electrochemical composite Ni64In36 with a destruction temperature in vacuum of ~520 K and nickel hydride with hydrogen with a decomposition temperature of ~330 K. The calculation of the activation energy of thermal desorption is produced for a hydrogen peak with a temperature of maximum 500 K. Arrhenius polyterms were obtained for two values of the reaction order index:  = 1 and  = 2. Arrhenius polyterms demonstrate the second order of reaction and the quadratic dependence of the desorption rate on the number of implant particles. The activation energy for a peak with a maximum temperature of 500 K is 2.9 eV, which indicates low energy extraction of the hydrogen isotope


DOI
10.12783/dteees/tpcase2018/30441

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