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

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.

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 Creators:
Han, Liuliu1, 2, Author              
Quan, Tao2, Author
Liu, Bin3, Author              
Xu, Xiandong4, Author              
Liu, Yong5, Author              
Affiliations:
1High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3010672              
2State Key Laboratory of Powder Metallurgy, Central South University, Changsha, China, ou_persistent22              
3State Key Lab of Powder Metallurgy, Central South University, Changsha 410083, China, ou_persistent22              
4Center for Electron Microscopy, College of Materials Science and Engineering, HunanUniversity, Changsha, China, ou_persistent22              
5State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, PR China, ou_persistent22              

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Free keywords: Aluminum alloys; Cobalt alloys; High strength alloys; Iron alloys; Oxidation resistance; Refractory alloys; Thermooxidation, Eutectic alloys; High strength, Eutectics
 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

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Language(s): eng - English
 Dates: 2020-12-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.jallcom.2020.156265
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Title: Journal of Alloys and Compounds
  Abbreviation : J. Alloy. Comp.
Source Genre: Journal
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Publ. Info: Lausanne, Switzerland : Elsevier B.V.
Pages: - Volume / Issue: 846 Sequence Number: 156265 Start / End Page: - Identifier: ISSN: 0925-8388
CoNE: https://pure.mpg.de/cone/journals/resource/954925567746