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

22 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

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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

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