Nucleation mechanism of intra-granular blisters in tungsten exposed to hydrogen plasma
Research output: Contribution to journal › Article › peer-review
Authors
Colleges, School and Institutes
External organisations
- School of Materials Science and Engineering
- Tsinghua University
- DIFFER-Dutch Institute for Fundamental Energy Research
Abstract
Despite being a subject of long-term research on fusion-reactor structural materials, the behaviour of hydrogen in tungsten under plasma exposure remains unclear. Here, the explicit transmission electron microscopy observations for recrystallised W after hydrogen plasma exposure are successfully obtained. These are the first observations to show the intra-granular blisters are located on the {100} planes. Molecular dynamics simulations confirm the hydrogen blister initiating at <100> dislocation core behaved similarly to those in experiment. We propose that the widely reported intra-granular hydrogen blisters are nucleated at the <100> edge dislocation core and develop along the (100) plane in tungsten.
Details
Original language | English |
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Pages (from-to) | 243-249 |
Number of pages | 7 |
Journal | Scripta Materialia |
Volume | 187 |
Publication status | Published - Oct 2020 |
Keywords
- Blister, Hydrogen plasma, Nucleation mechanism, Tungsten