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Oxidation Control of Atmospheric Plasma Sprayed FeAl Intermetallic Coatings Using Dry-Ice Blasting

Abstract : The performance of atmospheric plasma sprayed FeAl coatings has been remarkably limited because of oxidation and phase transformation during the high-temperature process of preparation. In the present work, FeAl intermetallic coatings were prepared by atmospheric plasma spraying combined with dry-ice blasting. The microstructure, oxidation, porosity, and surface roughness of FeAl intermetallic coatings were investigated. The results show that a denser FeAl coating with a lower content of oxide and lower degree of phase transformation can be achieved because of the cryogenic, the cleaning, and the mechanical effects of dry-ice blasting. The surface roughness value decreased, and the adhesive strength of FeAl coating increased after the application of dry-ice blasting during the atmospheric plasma spraying process. Moreover, the microhardness of the FeAl coating increased by 72%, due to the lower porosity and higher dislocation density.
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https://hal.univ-lorraine.fr/hal-01501846
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Submitted on : Tuesday, April 4, 2017 - 4:15:47 PM
Last modification on : Friday, April 2, 2021 - 3:35:01 AM

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Bo Song, Shujuan Dong, Pierre Coddet, Bernard Hansz, Thierry Grosdidier, et al.. Oxidation Control of Atmospheric Plasma Sprayed FeAl Intermetallic Coatings Using Dry-Ice Blasting. Journal of Thermal Spray Technology, ASM International/Springer, 2013, 22 (2-3), pp.345-351. ⟨10.1007/s11666-012-9840-4⟩. ⟨hal-01501846⟩

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