FeCrNiMnAl high-entropy alloy coating by spray deposition and thermite reaction. (2nd September 2019)

• Record Type: Journal Article
• Authors: Chen, Gang; Zhu, Lihua; Shen, Shucheng; Zhou, Chengshang
• Is Part Of: Surface engineering. Volume 35:Number 9(2019)
• Page Start: 809
• Page End: 815
• Publication Date: 2019-09-02
• Subjects: Spray deposition -- thermite reaction -- HEA coatings -- wear resistance -- corrosion resistance; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1080/02670844.2018.1524036
• Languages: English
• ISSNs: 0267-0844

Abstract

ABSTRACT: High-entropy alloy (HEA) coatings demonstrate excellent corrosion resistance and wear resistance. However, their applications are limited owing to a complicated process and high costs. In the present work, an FeCrNiMnAl HEA coating was synthesised by spray deposition combining with thermite reaction using a mixture of Fe2 O3, CrO3, MnO2, Ni, and Al powders as precursors. After spray deposition, the as-formed coating layer consisted of two body-centred cubic phases, and showed good metallurgical bonding with the substrate. The average microhardness value of the FeCrNiMnAl HEA coating reached 432.2 ± 10.8 HV, which was higher than that of the substrate (259.5 ± 8.4 HV). The coating also exhibited superior wear resistance and corrosion resistance compared with the substrate. This method has great potential for preparing HEA coatings.