Synergistic effects between helium and hydrogen isotopes on gas detrapping in polycrystalline nickel

E. Abramov, San-Qiang Shi, D. A. Thompson, W. W. Smeltzer

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

The thermal desorption and SEM techniques have been used to study the effects of the presence of deuterium and hydrogen atoms on the retention of implanted helium in polycrystalline nickel. For samples pre-implanted with 40 keV helium to a dose of 1 × 1021ions/m2the ratio of trapped deuterium atoms to the implanted helium was found to be about 0.4 D/He and an effective trapping energy ~ 0.5 eV was found. For samples pre-implanted with 10 keV He to doses from 1.5 × 1021to 4 × 1021ions/m2, low temperature helium release stages were observed, and resulted in a decrease of deuterium trapping efficiency to as low as 0.0075 D/He. Both deuterium and hydrogen charging were found to enhance the helium release and to decrease the release temperature. For the high dose samples, deuterium or hydrogen gas charging and thermal desorption were also found to induce blister growth and surface exfoliation.
Original languageEnglish
Pages (from-to)61-67
Number of pages7
JournalJournal of Nuclear Materials
Volume186
Issue number1
DOIs
Publication statusPublished - 2 Dec 1991
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

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