A candidate fusion engineering material, WC-FeCr

Samuel Humphry-Baker, Robert Harrison, Graeme Greaves, Alexander Knowles, George Smith, Stephen Donnelly, William Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)129-133
Number of pages5
JournalScripta Materialia
Volume155
Early online date26 Jun 2018
DOIs
Publication statusPublished - Oct 2018

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