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Metals 2017, 7(5), 177; doi:10.3390/met7050177

Mechanical Behavior and Sliding Wear Studies on Iron Aluminide Coatings Reinforced with Titanium Carbide

1
Département de génie des mines, de la métallurgie et des matériaux, Université Laval, Québec, QC G1V 0A6, Canada
2
Aluminium Research Centre-REGAL, Québec, QC G1V 0A6, Canada
3
Hydro-Quebec Research Institute, Varennes, QC J3X 1S1, Canada
4
Wärtsilä Canada Incorporated, LaSalle, QC H8N 1V1, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Elena Pereloma
Received: 11 April 2017 / Revised: 5 May 2017 / Accepted: 8 May 2017 / Published: 16 May 2017
View Full-Text   |   Download PDF [10181 KB, uploaded 16 May 2017]   |  

Abstract

Wear-resistant iron aluminide-based composites were coated on steel substrates with the High-Velocity Oxy-Fuel (HVOF) technique using ball milled Fe3Al and TiC powders as feedstock. The phase composition, microstructure, microhardness, elastic modulus and dry sliding wear performance of unreinforced Fe3Al and Fe3Al–TiC composite coatings (reinforced with 30 and 50 vol. % TiC particles) were evaluated in order to reveal the relationship between the mechanical and tribological behaviors. Compared to the unreinforced coatings, the composite coating with 30 vol. % TiC particles exhibited much greater hardness and higher elastic modulus. The increase of the elastic modulus of the composite coatings did not result in deterioration of sliding wear behavior. The addition of 50 vol. % TiC resulted in a further increase in hardness, however, both composite coatings showed the same elastic modulus. The fractured cross sectional surface of the unreinforced coating showed a weakly bonded microstructure promoting delamination in wear tests, whereas the composite fractured surface showed strong mechanical bonding between the matrix and carbide particles, leading to better cohesion. The Fe3Al–TiC coatings showed almost three orders of magnitude higher wear resistance under the dry sliding wear test compared to the unreinforced coatings. View Full-Text
Keywords: thermal spray; iron aluminide coating; titanium carbide; hardness; elastic modulus; fracture; wear thermal spray; iron aluminide coating; titanium carbide; hardness; elastic modulus; fracture; wear
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Amiriyan, M.; Blais, C.; Savoie, S.; Schulz, R.; Gariépy, M.; Alamdari, H.D. Mechanical Behavior and Sliding Wear Studies on Iron Aluminide Coatings Reinforced with Titanium Carbide. Metals 2017, 7, 177.

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