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Surface terraces in pure tungsten formed by high temperature oxidation

Abstract:

We observe large-scale surface terraces in tungsten oxidised at high temperature and in high vacuum. Their formation is highly dependent on crystal orientation, with only {111} grains showing prominent terraces. Terrace facets are aligned with {100} crystallographic planes, leading to an increase in total surface energy, making a diffusion-driven formation mechanism unlikely. Instead we hypothesize that preferential oxidation of {100} crystal planes controls t...

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Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1016/j.scriptamat.2019.08.007

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Institution:
University of Oxford
Division:
MPLS
Department:
Engineering Science
Role:
Author
Publisher:
Elsevier Publisher's website
Journal:
Scripta Materialia Journal website
Volume:
173
Pages:
110-114
Publication date:
2019-08-14
Acceptance date:
2019-08-05
DOI:
ISSN:
1359-6462
Source identifiers:
1038785
Language:
english
Keywords:
Pubs id:
pubs:1038785
UUID:
uuid:a17a3a1c-dff9-4593-85a3-afa183516ab9
Local pid:
pubs:1038785
Deposit date:
2019-08-06

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