A heat-resistant NiCo0.6Fe0.2Cr1.5SiAlTi0.2 overlay coating for high-temperature applications

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

doi:10.1149/2.0821613jes

A heat-resistant NiCo_0.6Fe_0.2Cr_1.5SiAlTi_0.2 overlay coating for high-temperature applications

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

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

22 Citations (Scopus)

Abstract

This paper proposes an overlay coating based on the high-entropy alloy composition NiCo_0.6Fe_0.2Cr_1.5SiAlTi_0.2 [high-entropy alloy coating (HEAC)]. HEAC samples underwent spark-plasma sintering processes and were subjected to oxidation tests, high-temperature hardness tests, and thermal conductivity and thermal expansion measurements. Experimental results indicated that the HEAC can form protective α-Al₂O₃ at 1100°C and exhibits oxidation behavior similar to that of MCrAlY. Furthermore, compared to MCrAlY, the HEAC possesses better thermal stability, higher hot hardness, lower thermal conductivity, and smaller thermal expansion. The potential of the HEAC as an overlay coating for high-temperature applications is discussed.

Original language	English
Pages (from-to)	C752-C758
Journal	Journal of the Electrochemical Society
Volume	163
Issue number	13
DOIs	https://doi.org/10.1149/2.0821613jes
Publication status	Published - 2016
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Materials Chemistry
Surfaces, Coatings and Films
Electrochemistry
Renewable Energy, Sustainability and the Environment

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title = "A heat-resistant NiCo0.6Fe0.2Cr1.5SiAlTi0.2 overlay coating for high-temperature applications",

abstract = "This paper proposes an overlay coating based on the high-entropy alloy composition NiCo0.6Fe0.2Cr1.5SiAlTi0.2 [high-entropy alloy coating (HEAC)]. HEAC samples underwent spark-plasma sintering processes and were subjected to oxidation tests, high-temperature hardness tests, and thermal conductivity and thermal expansion measurements. Experimental results indicated that the HEAC can form protective α-Al2O3 at 1100°C and exhibits oxidation behavior similar to that of MCrAlY. Furthermore, compared to MCrAlY, the HEAC possesses better thermal stability, higher hot hardness, lower thermal conductivity, and smaller thermal expansion. The potential of the HEAC as an overlay coating for high-temperature applications is discussed.",

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

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T1 - A heat-resistant NiCo0.6Fe0.2Cr1.5SiAlTi0.2 overlay coating for high-temperature applications

AU - Hsu, Wei Lin

AU - Murakami, Hideyuki

AU - Yeh, Jien Wei

AU - Yeh, An Chou

AU - Shimoda, Kazuya

PY - 2016

Y1 - 2016

N2 - This paper proposes an overlay coating based on the high-entropy alloy composition NiCo0.6Fe0.2Cr1.5SiAlTi0.2 [high-entropy alloy coating (HEAC)]. HEAC samples underwent spark-plasma sintering processes and were subjected to oxidation tests, high-temperature hardness tests, and thermal conductivity and thermal expansion measurements. Experimental results indicated that the HEAC can form protective α-Al2O3 at 1100°C and exhibits oxidation behavior similar to that of MCrAlY. Furthermore, compared to MCrAlY, the HEAC possesses better thermal stability, higher hot hardness, lower thermal conductivity, and smaller thermal expansion. The potential of the HEAC as an overlay coating for high-temperature applications is discussed.

AB - This paper proposes an overlay coating based on the high-entropy alloy composition NiCo0.6Fe0.2Cr1.5SiAlTi0.2 [high-entropy alloy coating (HEAC)]. HEAC samples underwent spark-plasma sintering processes and were subjected to oxidation tests, high-temperature hardness tests, and thermal conductivity and thermal expansion measurements. Experimental results indicated that the HEAC can form protective α-Al2O3 at 1100°C and exhibits oxidation behavior similar to that of MCrAlY. Furthermore, compared to MCrAlY, the HEAC possesses better thermal stability, higher hot hardness, lower thermal conductivity, and smaller thermal expansion. The potential of the HEAC as an overlay coating for high-temperature applications is discussed.

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A heat-resistant NiCo_0.6Fe_0.2Cr_1.5SiAlTi_0.2 overlay coating for high-temperature applications

Abstract

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