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Characterisation of oxide scale formation on a new single crystal superalloy for power generation applications

Abstract:
The oxidation behaviour at 950°C of a prototype nickel-based single crystal superalloy containing ~15 wt%Cr is studied, with and without silicon alloying. It is demonstrated that the alloy is a marginal alumina former, with further alloying by Si promoting the formation of a continuous, protective alumina scale. Transmission electron microscopy reveals that out-growing alumina forms during the early stages of oxidation. The presence of silicon within the alumina is detected using atom probe tomography.
Publication status:
Published

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Authors


Marquis, EA More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Materials
Journal:
MATERIALS AT HIGH TEMPERATURES
Volume:
29
Issue:
3
Pages:
272-278
Publication date:
2012-08-05
DOI:
ISSN:
0960-3409
URN:
uuid:ec7781b1-7876-4908-a46a-5ced8e74a319
Source identifiers:
369719
Local pid:
pubs:369719

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