Novel Al2CoCrFeNi high-entropy alloy coating produced using suspension high velocity air fuel (SHVAF) spraying
Ashok Meghwal, Ameey Anupam, Michael Boschen, Surinder Singh, Stefan Björklund, Shrikant Joshi, Paul Munroe, Christopher C. Berndt, Andrew Siao Ming Ang
Abstract
Metallic coatings of Al2CoCrFeNi high entropy alloy (HEA) were deposited using the suspension high velocity air fuel spray (SHVAF) process, towards exploring its viability as a bond coat in thermal barrier coatings. The relatively high Al content promoted a BCC + B2 phase-dominated coating structure, leading to enhanced mechanical properties. The oxidized microstructure exhibited a protective Al2O3 layer with characteristics comparable to conventional bond coat alloys.
Topics & Concepts
Materials scienceMicrostructureGas dynamic cold sprayAlloyCoatingThermal sprayingSuspension (topology)MetallurgyComposite materialThermal barrier coatingMetallic bondingMetalMathematicsHomotopyPure mathematicsHigh-Temperature Coating BehaviorsHigh Entropy Alloys StudiesMetal and Thin Film Mechanics