Y/Hf-doped AlCoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance

Jie Lu; Ying Chen; Han Zhang; Na Ni; Ling Li; Limin He; Rende Mu; Xiaofeng Zhao; Fangwei Guo

doi:10.1016/j.corsci.2019.108426

Y/Hf-doped AlCoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance

Jie Lu, Ying Chen, Han Zhang, Na Ni, Ling Li, Limin He, Rende Mu, Xiaofeng Zhao, Fangwei Guo

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Abstract

In this study, we report a type of ultra oxidation and spallation resistant Y/Hf-doped AlCoCrFeNi high-entropy alloy (HEA). The alloy exhibits a significantly lower oxidation rate at 1100 ℃ with a kp value of about 1.9×10-13 g2 cm-4s-1, which is one magnitude lower than those of the conventional NiCoCrAlY alloys. Additionally, the alloy shows a strong resistance to the oxide scale spallation. The superior oxidation performance for the Y/Hf-doped HEA can be attributed to the fast establishment of exclusive α-Al2O3 scale, the beneficial reactive element effect and the large columnar grain size (width) in the oxide scale.

Original language	English
Article number	108426
Journal	Corrosion Science
Early online date	2 Jan 2020
DOIs	https://doi.org/10.1016/j.corsci.2019.108426
Publication status	Published - 2020

Keywords

Alumina
High temperature
High-entropy alloy
Oxidation
Spallation

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10.1016/j.corsci.2019.108426

Y/Hf-doped AlCoCrFeNi High-entropy Alloy with Ultra Oxidation and Spallation ResistanceAccepted author manuscript, 3.41 MB

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title = "Y/Hf-doped AlCoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance",

abstract = "In this study, we report a type of ultra oxidation and spallation resistant Y/Hf-doped AlCoCrFeNi high-entropy alloy (HEA). The alloy exhibits a significantly lower oxidation rate at 1100 ℃ with a kp value of about 1.9×10-13 g2 cm-4s-1, which is one magnitude lower than those of the conventional NiCoCrAlY alloys. Additionally, the alloy shows a strong resistance to the oxide scale spallation. The superior oxidation performance for the Y/Hf-doped HEA can be attributed to the fast establishment of exclusive α-Al2O3 scale, the beneficial reactive element effect and the large columnar grain size (width) in the oxide scale. ",

keywords = "Alumina, High temperature, High-entropy alloy, Oxidation, Spallation",

author = "Jie Lu and Ying Chen and Han Zhang and Na Ni and Ling Li and Limin He and Rende Mu and Xiaofeng Zhao and Fangwei Guo",

year = "2020",

doi = "10.1016/j.corsci.2019.108426",

language = "English",

journal = "Corrosion Science",

issn = "0010-938X",

publisher = "Elsevier BV",

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TY - JOUR

T1 - Y/Hf-doped AlCoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance

AU - Lu, Jie

AU - Chen, Ying

AU - Zhang, Han

AU - Ni, Na

AU - Li, Ling

AU - He, Limin

AU - Mu, Rende

AU - Zhao, Xiaofeng

AU - Guo, Fangwei

PY - 2020

Y1 - 2020

N2 - In this study, we report a type of ultra oxidation and spallation resistant Y/Hf-doped AlCoCrFeNi high-entropy alloy (HEA). The alloy exhibits a significantly lower oxidation rate at 1100 ℃ with a kp value of about 1.9×10-13 g2 cm-4s-1, which is one magnitude lower than those of the conventional NiCoCrAlY alloys. Additionally, the alloy shows a strong resistance to the oxide scale spallation. The superior oxidation performance for the Y/Hf-doped HEA can be attributed to the fast establishment of exclusive α-Al2O3 scale, the beneficial reactive element effect and the large columnar grain size (width) in the oxide scale.

AB - In this study, we report a type of ultra oxidation and spallation resistant Y/Hf-doped AlCoCrFeNi high-entropy alloy (HEA). The alloy exhibits a significantly lower oxidation rate at 1100 ℃ with a kp value of about 1.9×10-13 g2 cm-4s-1, which is one magnitude lower than those of the conventional NiCoCrAlY alloys. Additionally, the alloy shows a strong resistance to the oxide scale spallation. The superior oxidation performance for the Y/Hf-doped HEA can be attributed to the fast establishment of exclusive α-Al2O3 scale, the beneficial reactive element effect and the large columnar grain size (width) in the oxide scale.

KW - Alumina

KW - High temperature

KW - High-entropy alloy

KW - Oxidation

KW - Spallation

U2 - 10.1016/j.corsci.2019.108426

DO - 10.1016/j.corsci.2019.108426

M3 - Article

SN - 0010-938X

JO - Corrosion Science

JF - Corrosion Science

M1 - 108426

ER -

Y/Hf-doped AlCoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance

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Keywords

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