Y/Hf-doped Al0.7CoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance at 1200 °C

Jie Lu; Ying Chen; Han Zhang; Limin He; Rende Mu; Zaoyu Shen; Xiaofeng Zhao; Fangwei Guo

doi:10.1016/j.corsci.2020.108803

Y/Hf-doped Al0.7CoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance at 1200 °C

Jie Lu, Ying Chen, Han Zhang, Limin He, Rende Mu, Zaoyu Shen, Xiaofeng Zhao, Fangwei Guo

Materials Engineering

Research output: Contribution to journal › Article › peer-review

192 Downloads (Pure)

Abstract

In this study, a new type of Y/Hf-doped Al0.7CoCrFeNi high-entropy alloy was fabricated and reported. Its oxidation behavior was investigated at 1200 °C compared with the conventional NiCoCrAlYHf alloy. The superior oxidation performance of the Y/Hf-doped Al0.7CoCrFeNi at 1200 °C is attributed to the dramatically enhancing homogeneity of Y/Hf-rich precipitates distribution at phase boundaries resulting from the intrinsic nano-sized phases in the alloy. The improving homogeneity of Y/Hf distribution is beneficial to inhibit the formation of interfacial imperfections and the interfacial S segregation, thus contributing to an enhancing interfacial adhesion and a strong resistance to TGO spallation.

Original language	English
Pages (from-to)	108803
Journal	Corrosion Science
Volume	174
Early online date	9 Jun 2020
DOIs	https://doi.org/10.1016/j.corsci.2020.108803
Publication status	Published - 1 Sept 2020

Access to Document

10.1016/j.corsci.2020.108803

YHf-doped Al0.7CoCrFeNi high-entropy alloy with ultra and spallation resistance at 1200 CAccepted author manuscript, 2.43 MBLicence: CC BY-NC-ND

https://linkinghub.elsevier.com/retrieve/pii/S0010938X20306697

Cite this

@article{dc7bc8fb306b4edba10fe0891aec6f24,

title = "Y/Hf-doped Al0.7CoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance at 1200 °C",

abstract = "In this study, a new type of Y/Hf-doped Al0.7CoCrFeNi high-entropy alloy was fabricated and reported. Its oxidation behavior was investigated at 1200 °C compared with the conventional NiCoCrAlYHf alloy. The superior oxidation performance of the Y/Hf-doped Al0.7CoCrFeNi at 1200 °C is attributed to the dramatically enhancing homogeneity of Y/Hf-rich precipitates distribution at phase boundaries resulting from the intrinsic nano-sized phases in the alloy. The improving homogeneity of Y/Hf distribution is beneficial to inhibit the formation of interfacial imperfections and the interfacial S segregation, thus contributing to an enhancing interfacial adhesion and a strong resistance to TGO spallation.",

author = "Jie Lu and Ying Chen and Han Zhang and Limin He and Rende Mu and Zaoyu Shen and Xiaofeng Zhao and Fangwei Guo",

year = "2020",

month = sep,

day = "1",

doi = "10.1016/j.corsci.2020.108803",

language = "English",

volume = "174",

pages = "108803",

journal = "Corrosion Science ",

issn = "0010-938X",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Y/Hf-doped Al0.7CoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance at 1200 °C

AU - Lu, Jie

AU - Chen, Ying

AU - Zhang, Han

AU - He, Limin

AU - Mu, Rende

AU - Shen, Zaoyu

AU - Zhao, Xiaofeng

AU - Guo, Fangwei

PY - 2020/9/1

Y1 - 2020/9/1

N2 - In this study, a new type of Y/Hf-doped Al0.7CoCrFeNi high-entropy alloy was fabricated and reported. Its oxidation behavior was investigated at 1200 °C compared with the conventional NiCoCrAlYHf alloy. The superior oxidation performance of the Y/Hf-doped Al0.7CoCrFeNi at 1200 °C is attributed to the dramatically enhancing homogeneity of Y/Hf-rich precipitates distribution at phase boundaries resulting from the intrinsic nano-sized phases in the alloy. The improving homogeneity of Y/Hf distribution is beneficial to inhibit the formation of interfacial imperfections and the interfacial S segregation, thus contributing to an enhancing interfacial adhesion and a strong resistance to TGO spallation.

AB - In this study, a new type of Y/Hf-doped Al0.7CoCrFeNi high-entropy alloy was fabricated and reported. Its oxidation behavior was investigated at 1200 °C compared with the conventional NiCoCrAlYHf alloy. The superior oxidation performance of the Y/Hf-doped Al0.7CoCrFeNi at 1200 °C is attributed to the dramatically enhancing homogeneity of Y/Hf-rich precipitates distribution at phase boundaries resulting from the intrinsic nano-sized phases in the alloy. The improving homogeneity of Y/Hf distribution is beneficial to inhibit the formation of interfacial imperfections and the interfacial S segregation, thus contributing to an enhancing interfacial adhesion and a strong resistance to TGO spallation.

U2 - 10.1016/j.corsci.2020.108803

DO - 10.1016/j.corsci.2020.108803

M3 - Article

SN - 0010-938X

VL - 174

SP - 108803

JO - Corrosion Science

JF - Corrosion Science

ER -

Y/Hf-doped Al0.7CoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance at 1200 °C

Abstract

Access to Document

Fingerprint

Cite this

Y/Hf-doped Al0.7CoCrFeNi high-entropy alloy with ultra oxidation and spallation resistance at 1200 °C