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Surfacemorphologyofthebulktungstendivertortiles fromJETITER‐likewall
- Source :
- Physica Scripta. 2020(T171):014010
- Publication Year :
- 2020
-
Abstract
- Surface characterization of bulk tungsten tiles (W lamellae) used during the first campaign of JET with the ITER-Like Wall (JET-ILW) was performed by means of microscopy and tritium imaging techniques. This is the first report regarding very detailed structural studies of W lamellae from the JET-ILW divertor. A special feature of the W lamellae installed in JET is the intrinsic network of micro-cracks detected on surfaces of the as-manufactured material. Analyses of different W lamellae samples on the plasma facing surface reveal two types of surface structures caused by plasma impact: areas with strong erosion and regions of mild plasma interaction. In regions of strong erosion, a thin modified layer (thickness of ~20 nm) with a high density of defects including bubble-like structures has been formed. In addition, features indicating melting along edges of micro-cracks with the micro-scale plastic deformation have been identified.
Details
- Language :
- English
- ISSN :
- 00318949
- Volume :
- 2020
- Issue :
- T171
- Database :
- OpenAIRE
- Journal :
- Physica Scripta
- Accession number :
- edsair.jairo.........b23edf6c94a7dd378f044e577ab27549