Imperial College London
Portrait Picture

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{Nagy:2022:10.1016/j.scriptamat.2021.114373,
author = {Nagy, D and Humphry-Baker, SA},
doi = {10.1016/j.scriptamat.2021.114373},
journal = {Scripta Materialia},
pages = {1--6},
title = {An oxidation mechanism map for tungsten},
url = {http://dx.doi.org/10.1016/j.scriptamat.2021.114373},
volume = {209},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - A tungsten oxidation mechanism map is developed to clarify literature confusion about the dominant oxidation kinetic regime and to enable improved predictions in extreme environments. Thermogravimetry data is systematically extracted from 14 papers in the range 600–1600 °C and treated as three distinct kinetic regimes: parabolic oxidation, linear oxidation, and sublimation. A mechanism map is constructed that shows metal recession thickness contours for each regime in time-temperature space. The map enables consideration of a fusion reactor accident combining loss of coolant and vacuum, in which a tungsten first wall could reach ∼1200 °C for several weeks. Complete oxidation of the first wall and 2 mm of sublimation is predicted. Similar maps must be developed for accident tolerant tungsten alloys if reliable predictions are to be made about their performance.
AU  - Nagy,D
AU  - Humphry-Baker,SA
DO  - 10.1016/j.scriptamat.2021.114373
EP  - 6
PY  - 2022///
SN  - 1359-6462
SP  - 1
TI  - An oxidation mechanism map for tungsten
T2  - Scripta Materialia
UR  - http://dx.doi.org/10.1016/j.scriptamat.2021.114373
UR  - https://www.sciencedirect.com/science/article/pii/S1359646221006539?via%3Dihub
UR  - http://hdl.handle.net/10044/1/93415
VL  - 209
ER  -
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