Imperial College London
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Dr Sam Humphry-Baker

Faculty of Engineering, Department of Materials

Lecturer in Ceramics
 
 
 
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Contact

 

s.humphry-baker

 
 
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Location

 

LM.04DRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Humphry-Baker:2019:10.1016/j.jnucmat.2019.06.041,
author = {Humphry-Baker, S and Smith, GDW and Pintsuk, G},
doi = {10.1016/j.jnucmat.2019.06.041},
journal = {Journal of Nuclear Materials},
pages = {239--246},
title = {Thermal shock of tungsten carbide in plasma-facing conditions},
url = {http://dx.doi.org/10.1016/j.jnucmat.2019.06.041},
volume = {524},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Tungsten carbide (WC) has been found to have higher resistance to plasma-induced thermal shock compared to rolled tungsten. The electron beam device JUDITH 1 was used to simulate likely thermal shock conditions induced by edge localised modes and plasma disruptions. Loading conditions of 100–1000 cycles, heat fluxes of 0.19–1.13GW/m2 and base temperatures of 400–1000°C were employed on two candidate WC-based materials: a monolithic WC ceramic, and a WC-FeCr composite. Surprisingly, the monolith outperformed the composite under all conditions. This was unexpected, particularly at 400 °C, based on the calculated thermal shock resistance parameters. The result was explained by preferential melting of the metallic FeCr binder. Compared to available data collected under identical conditions on rolled tungsten plate, monolithic WC had lower surface roughness from thermal shock damage, particularly when tested at 400°C. This shows promise for its use as a plasma facing material. Strategies for further improving performance are discussed.
AU  - Humphry-Baker,S
AU  - Smith,GDW
AU  - Pintsuk,G
DO  - 10.1016/j.jnucmat.2019.06.041
EP  - 246
PY  - 2019///
SN  - 0022-3115
SP  - 239
TI  - Thermal shock of tungsten carbide in plasma-facing conditions
T2  - Journal of Nuclear Materials
UR  - http://dx.doi.org/10.1016/j.jnucmat.2019.06.041
UR  - http://hdl.handle.net/10044/1/71688
VL  - 524
ER  -
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