Microstructural evolution in pure and ZrC strengthened tungsten under ion irradiation at 600°C

Research output: Contribution to journalArticle

Authors

Institutes & Expert groups

  • Indira Gandhi Centre for Atomic Research
  • Institute of Solid State Physics - Chinese Academy of Sciences

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Abstract

The microstructural evolution in ultra-fine grain (UFG) tungsten reinforced with ZrC particles under ion irradiation was investigated by transmission electron microscopy and compared to the effect of ion irradiation in reference ITER specification tungsten. Here, we report the evolution of the microstructure under heavy ion irradiation to mimic the neutron irradiation damage taking place in a nuclear fusion environment. The irradiation was performed with 9.1 MeV gold ions at 600°C to reach the end-of-life irradiation dose in ITER and DEMO divertor (i.e. 1 and 5 dpa). The microstructure is investigated by means of transmission electron microscopy. It is found that the ion induced defect structure does not deviate significantly from the reference tungsten. The main defects are a/2<111> type dislocation loops and nano-metric voids. The defect concentration is already saturated at 1 dpa and the higher irradiation damage was not found to have a significant effect on the defect concentration.

Details

Original languageEnglish
Article number152710
Pages (from-to)1-9
Number of pages9
JournalJournal of Nuclear Materials
Volume544
DOIs
Publication statusPublished - 9 Dec 2020

Keywords

  • Tungsten, Microstructure, Ion irradiation, Fusion

ID: 6978468