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

Research output: Contribution to journalArticle

19 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)71-74
Number of pages4
JournalSurface and Coatings Technology
Volume316
DOIs
Publication statusPublished - 2017 Apr 25
Externally publishedYes

Fingerprint

Entropy
entropy
coatings
Coatings
Bearings (structural)
Oxidation
oxidation
High temperature applications
plasma spraying
Plasma spraying
oxidation resistance
Steel
spraying
Oxidation resistance
Spraying
wear resistance
Wear resistance
Hot Temperature
hardness
Hardness

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

Cite this

On the study of thermal-sprayed Ni0.2Co0.6Fe0.2CrSi0.2AlTi0.2 HEA overlay coating. / Hsu, Wei Lin; Murakami, Hideyuki; Yeh, Jien Wei; Yeh, An Chou; Shimoda, Kazuya.

In: Surface and Coatings Technology, Vol. 316, 25.04.2017, p. 71-74.

Research output: Contribution to journalArticle

Hsu, Wei Lin ; Murakami, Hideyuki ; Yeh, Jien Wei ; Yeh, An Chou ; Shimoda, Kazuya. / On the study of thermal-sprayed Ni0.2Co0.6Fe0.2CrSi0.2AlTi0.2 HEA overlay coating. In: Surface and Coatings Technology. 2017 ; Vol. 316. pp. 71-74.
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AU - Yeh, An Chou

AU - Shimoda, Kazuya

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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.

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