On the study of thermal-sprayed Ni0.2Co0.6Fe0.2CrSi0.2AlTi0.2 HEA overlay coating

Wei Lin Hsu; Hideyuki Murakami; Jien Wei Yeh; An Chou Yeh; Kazuya Shimoda

doi:10.1016/j.surfcoat.2017.02.073

On the study of thermal-sprayed Ni_0.2Co_0.6Fe_0.2CrSi_0.2AlTi_0.2 HEA overlay coating

Wei Lin Hsu, Hideyuki Murakami, Jien Wei Yeh, An Chou Yeh^*, Kazuya Shimoda

^*Corresponding author for this work

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

65 Citations (Scopus)

Abstract

The present works investigated the microstructure, mechanical properties and oxidation behavior of the Ni_0.2Co_0.6Fe_0.2CrSi_0.2AlTi_0.2 high-entropy alloy (HEA) coating fabricated by atmospheric plasma spraying (APS) and high-velocity oxygen-fuel spraying (HVOF) process. The hardness of HEA coating is about 800 HV and its wear resistance (20 m/mm³) is nearly twice higher than that of the SUJ2 bearing steel (12 m/mm³). The isothermal oxidation weight gain test demonstrates that the HEA coating exhibits good oxidation resistance similar to MCrAlY coating at 1100 °C due to the formation of a protective α-Al₂O₃ scale. The thermal-sprayed HEA coating is thus promising as an overlay coating for high-temperature applications.

Original language	English
Pages (from-to)	71-74
Number of pages	4
Journal	Surface and Coatings Technology
Volume	316
DOIs	https://doi.org/10.1016/j.surfcoat.2017.02.073
Publication status	Published - 2017 Apr 25
Externally published	Yes

Keywords

High-entropy alloy
Mechanical properties
Overlay coating
Oxidation
Thermal spray

ASJC Scopus subject areas

Chemistry(all)
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.surfcoat.2017.02.073

Cite this

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title = "On the study of thermal-sprayed Ni0.2Co0.6Fe0.2CrSi0.2AlTi0.2 HEA overlay coating",

abstract = "The present works investigated the microstructure, mechanical properties and oxidation behavior of the Ni0.2Co0.6Fe0.2CrSi0.2AlTi0.2 high-entropy alloy (HEA) coating fabricated by atmospheric plasma spraying (APS) and high-velocity oxygen-fuel spraying (HVOF) process. The hardness of HEA coating is about 800 HV and its wear resistance (20 m/mm3) is nearly twice higher than that of the SUJ2 bearing steel (12 m/mm3). The isothermal oxidation weight gain test demonstrates that the HEA coating exhibits good oxidation resistance similar to MCrAlY coating at 1100 °C due to the formation of a protective α-Al2O3 scale. The thermal-sprayed HEA coating is thus promising as an overlay coating for high-temperature applications.",

keywords = "High-entropy alloy, Mechanical properties, Overlay coating, Oxidation, Thermal spray",

author = "Hsu, {Wei Lin} and Hideyuki Murakami and Yeh, {Jien Wei} and Yeh, {An Chou} and Kazuya Shimoda",

note = "Funding Information: The authors gratefully acknowledge the sponsorship by the National Institute for Materials Science, Japan (International Cooperative Graduate Program). Dr. K.Y. Tsai from National Tsing Hua University, Taiwan, ROC, is thanked for preparing APS coating samples. Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

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day = "25",

doi = "10.1016/j.surfcoat.2017.02.073",

language = "English",

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AU - Hsu, Wei Lin

AU - Murakami, Hideyuki

AU - Yeh, Jien Wei

AU - Yeh, An Chou

AU - Shimoda, Kazuya

N1 - Funding Information: The authors gratefully acknowledge the sponsorship by the National Institute for Materials Science, Japan (International Cooperative Graduate Program). Dr. K.Y. Tsai from National Tsing Hua University, Taiwan, ROC, is thanked for preparing APS coating samples. Publisher Copyright: © 2017 Elsevier B.V.

PY - 2017/4/25

Y1 - 2017/4/25

N2 - The present works investigated the microstructure, mechanical properties and oxidation behavior of the Ni0.2Co0.6Fe0.2CrSi0.2AlTi0.2 high-entropy alloy (HEA) coating fabricated by atmospheric plasma spraying (APS) and high-velocity oxygen-fuel spraying (HVOF) process. The hardness of HEA coating is about 800 HV and its wear resistance (20 m/mm3) is nearly twice higher than that of the SUJ2 bearing steel (12 m/mm3). The isothermal oxidation weight gain test demonstrates that the HEA coating exhibits good oxidation resistance similar to MCrAlY coating at 1100 °C due to the formation of a protective α-Al2O3 scale. The thermal-sprayed HEA coating is thus promising as an overlay coating for high-temperature applications.

AB - The present works investigated the microstructure, mechanical properties and oxidation behavior of the Ni0.2Co0.6Fe0.2CrSi0.2AlTi0.2 high-entropy alloy (HEA) coating fabricated by atmospheric plasma spraying (APS) and high-velocity oxygen-fuel spraying (HVOF) process. The hardness of HEA coating is about 800 HV and its wear resistance (20 m/mm3) is nearly twice higher than that of the SUJ2 bearing steel (12 m/mm3). The isothermal oxidation weight gain test demonstrates that the HEA coating exhibits good oxidation resistance similar to MCrAlY coating at 1100 °C due to the formation of a protective α-Al2O3 scale. The thermal-sprayed HEA coating is thus promising as an overlay coating for high-temperature applications.

KW - High-entropy alloy

KW - Mechanical properties

KW - Overlay coating

KW - Oxidation

KW - Thermal spray

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