Revealing the excellent high-temperature oxidation resistance of a 
non-equimolar Al1Co25Cr18Fe23Ni23Ta10 compositional complex eutectic alloy

Han, Liuliu; Quan, Tao; Liu, Bin; Xu, Xiandong; Liu, Yong

doi:10.1016/j.jallcom.2020.156265

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Revealing the excellent high-temperature oxidation resistance of a non-equimolar Al₁Co₂₅Cr₁₈Fe₂₃Ni₂₃Ta₁₀ compositional complex eutectic alloy

MPS-Authors

/persons/resource/persons249976

Han, Liuliu
High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;
State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Han, L., Quan, T., Liu, B., Xu, X., & Liu, Y. (2020). Revealing the excellent high-temperature oxidation resistance of a non-equimolar Al₁Co₂₅Cr₁₈Fe₂₃Ni₂₃Ta₁₀ compositional complex eutectic alloy. Journal of Alloys and Compounds, 846: 156265. doi:10.1016/j.jallcom.2020.156265.

Cite as: https://hdl.handle.net/21.11116/0000-0009-6FEF-F

Abstract

Refractory high-entropy alloys (RHEAs) usually have a high strength at elevate temperatures. However, their oxidation resistance is inferior for practical applications. Here we proposed a eutectic design of compositionally complex eutectic alloy (CCEA) by adding 10 at. Ta to the Al2Co28Cr20Fe25Ni25, the resulting alloy shows a good combination of mechanical properties and oxidation resistance, e.g. a yield strength of 764 MPa and an oxidation resistance rate of 0.0031 mg cm−2h−1 at 800 °C, which outperforms those of RHEAs. The excellent oxidation resistance is attributable to the formation of protective Cr2O3 and CrTaO4 layer at the surface, which prevents the matrix from further contact with O2. © 2020