A candidate fusion engineering material, WC-FeCr. (October 2018)

• Record Type: Journal Article
• Authors: Humphry-Baker, Samuel A.; Harrison, Robert W.; Greaves, Graeme; Knowles, Alexander J.; Smith, George D.W.; Donnelly, Stephen E.; Lee, William E.
• Is Part Of: Scripta materialia. Number 155(2018)
• Page Start: 129
• Page End: 133
• Publication Date: 2018-10
• Subjects: Cermets -- Interface defects -- Irradiation -- Helium bubbles -- Transmission electron microscopy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.06.027
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: A new candidate fusion engineering material, WC-FeCr, has been irradiated with He ions at 25 and 500 °C. Ions were injected at 6 keV to a dose of ~15 dpa and 50 at. % He, simulating direct helium injection from the plasma. The microstructural evolution was continuously characterised in situ using transmission electron microscopy. In the FeCr phase, a coarse array of 3–6 nm bubbles formed. In the WC, bubbles were less prominent and smaller (~2 nm). Spherical-cap bubbles formed at hetero-phase interfaces of tertiary precipitates, indicating that enhanced processing routes to minimise precipitation could further improve irradiation tolerance. Graphical abstract: Unlabelled Image