Plasma-Sprayed NiCrCuMoB High Entropy Alloy Coating with low oxide content enabled by Boron Alloyed Powder

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Due to the unique properties of high entropy alloys (HEAs), their thermal spray coatings have been intensively investigated. However, due to severe in-flight oxidation induced high oxide inclusions within the coatings, their properties are always much lower than their bulk counterparts. In this study, NiCrCuMoB HEA powders containing boron are designed to deposit the HEA coatings with oxide-free molten droplets by atmospheric plasma spraying. The in-flight in-situ deoxidizing effect through boron is examined through the collected HEA particles passing through the plasma jet. The isolated splats are deposited on the polished stainless-steel substrates for examining their oxidation behavior. The coating microstructure and mechanical properties are investigated. Results show that in-flight oxidation of molten particles can be effectively suppressed and oxide-free HEA particles are achieved. Due to the deoxidizing effect of boron, bulk-like HEA coatings with metallurgical bonding and a low oxide content are achieved.

Original languageEnglish
Title of host publicationThermal Spray 2025 - Sustainable Innovations in Thermal Spray Technology
Subtitle of host publicationPioneering A Greener Future, Proceedings from the International Thermal Spray Conference and Exposition
EditorsF. Azarmi, S. Bagherifard, P. Bandyopadhyay, H. Che, H. Jazi, H. Koivuluoto, Y. Lau, O. Ozdemir, A. Pakseresht, L. Toma, J. Veilleux
PublisherASM International
Pages361-368
Number of pages8
ISBN (Electronic)9798331325442
DOIs
StatePublished - 2025
Event2025 International Thermal Spray Conference and Exposition, ITSC 2025 - Vancouver, Canada
Duration: 5 May 20258 May 2025

Publication series

NameThermal Spray 2025 - Sustainable Innovations in Thermal Spray Technology: Pioneering A Greener Future, Proceedings from the International Thermal Spray Conference and Exposition

Conference

Conference2025 International Thermal Spray Conference and Exposition, ITSC 2025
Country/TerritoryCanada
CityVancouver
Period5/05/258/05/25

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