Features of hydrogen trapping and desorption during deposition of yttrium coating on zirconium in a gas discharge

7th Conference on Low temperature Plasma in the Processes of Functional Coating Preparation

Evsin, A.E.^1 ; Begrambekov, L.B.^1 ; Dovganyuk, S.S.^1

National Research Nuclear University MEPhI, 31 Kashirskoe shosse, Moscow

115409, Russia^1

关键词: Desorption of hydrogen;    Deuterium trapping;    Energy of ions;    Hydrogen desorption;    Hydrogen isotope;    Hydrogen trapping;    Influence of oxygen;    Plasma exposure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/669/1/012009/pdf
DOI  :  10.1088/1742-6596/669/1/012009

来源: IOP

【 摘 要 】

Transport of hydrogen isotopes during the various regimes of deposition of yttrium coating on zirconium in argon plasma with addition of deuterium is studied. The influence of oxygen contamination in plasma-generating gas on the processes of trapping and desorption of hydrogen isotopes is also investigated. It is shown that deposition of yttrium coating on zirconium in Ar+5%D2plasma enhances both hydrogen desorption from zirconium and deuterium trapping into zirconium in comparison to those under plasma exposure without deposition. Yttrium deposition in Ar+25%O2+5%D2plasma, conversely, mitigates both hydrogen desorption and deuterium trapping. Hydrogen desorption from zirconium increases with the increase of energy of ions, bombarding the sample during deposition of the coating in oxygen-free plasma, but it, on the contrary, decreases in oxygen-containing plasma.