Promotion of topologically close-packed phases in a Ru-containing Ni-based superalloy

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We report on the effects of Ru addition on the formation of topologically close-packed (TCP) phases in a Ni-based superalloy during high-temperature exposure. The Ru addition reduces the lattice misfit between the gamma and TCP phase, unexpectedly promoting nucleation of the TCP phase. Furthermore, the gamma matrix is destabilized by Ru, while the stability of TCP phase is less affected according to the prediction of an electronic structure map. The results of this work indicate that gamma destabilization is another important factor for the role of Ru in TCP phase formation.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2023-01
Language
English
Article Type
Article
Citation

SCRIPTA MATERIALIA, v.222

ISSN
1359-6462
DOI
10.1016/j.scriptamat.2022.115041
URI
http://hdl.handle.net/10203/298904
Appears in Collection
MS-Journal Papers(저널논문)
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