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Sliding Wear Response of Nanostructured YSZ Suspension Plasma-Sprayed Coating

Article dans une revue avec comité de lecture
Author
KOSSMAN, Stephania
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
CHICOT, Didier
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
DECOOPMAN, Xavier
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
IOST, Alain
211915 Mechanics surfaces and materials processing [MSMP]
VAN GORP, Adrien
211915 Mechanics surfaces and materials processing [MSMP]
MEILLOT, E.
PUCHI-CABRERA, Eli-Saul
1252 Laboratoire de Mécanique de Lille - FRE 3723 [LML]
SANTANA, Y.Y.
STAIA, Mariana
211915 Mechanics surfaces and materials processing [MSMP]

URI
http://hdl.handle.net/10985/9674
DOI
10.1007/s11666-014-0146-6
Date
2014
Journal
Journal of Thermal Spray Technology

Abstract

Nanostructured yttria-stabilized zirconia coatings for applications in high-temperature environments can be deposited by suspension plasma spraying (SPS) techniques. The present research has been conducted in order to study the sliding wear response of a SPS ZrO2–8% mol. Y2O3 coating (75 lm in thickness) deposited onto a Haynes 230 substrate, using pin-on-disc tests. Some of the coated samples were subsequently heat-treated for 1 h at 300 and 600 !C. Samples characterization prior and after the wear tests was carried out by SEM, EDS, XRD and optical profilometry techniques. Instrumented indentation was employed to determine elastic modulus and hardness. The results have shown that the as-sprayed and heat-treated samples experienced severe wear (10213 m3/Nm) and the worst wear performance corresponded to the sample heat treated at 600 !C. Such a behavior could be related to both the structural changes that took place during heat treatment and the nature and level of the residual stresses in the coatings. In general, the morphologies of the wear tracks observed by SEM have shown a smoothing of the surface, brittle fracture, smearing and grain pull-out.

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