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Coatings 2014, 4(1), 18-36; doi:10.3390/coatings4010018

Abrasion, Erosion and Cavitation Erosion Wear Properties of Thermally Sprayed Alumina Based Coatings

Department of Materials Science, Tampere University of Technology, Korkeakoulunkatu 6, FI-33720 Tampere, Finland
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Received: 7 November 2013 / Revised: 2 December 2013 / Accepted: 18 December 2013 / Published: 2 January 2014
(This article belongs to the Special Issue Advanced Thermal Spray Coatings for Emerging Applications)
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Abstract

Thermally-sprayed alumina based materials, e.g., alumina-titania (Al2O3-TiO2), are commonly applied as wear resistant coatings in industrial applications. Properties of the coatings depend on the spray process, powder morphology, and chemical composition of the powder. In this study, wear resistant coatings from Al2O3 and Al2O3-13TiO2 powders were sprayed with plasma and high-velocity oxygen-fuel (HVOF) spray processes. Both, fused and crushed, and agglomerated and sintered Al2O3-13TiO2 powders were studied and compared to pure Al2O3. The coatings were tested for abrasion, erosion, and cavitation resistances in order to study the effect of the coating structure on the wear behavior. Improved coating properties were achieved when agglomerated and sintered nanostructured Al2O3-13TiO2 powder was used in plasma spraying. Coatings with the highest wear resistance in all tests were produced by HVOF spraying from fused and crushed powders.
Keywords: abrasion; erosion; cavitation; plasma spray; high-velocity oxygen-fuel (HVOF); alumina; alumina-titania abrasion; erosion; cavitation; plasma spray; high-velocity oxygen-fuel (HVOF); alumina; alumina-titania
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Matikainen, V.; Niemi, K.; Koivuluoto, H.; Vuoristo, P. Abrasion, Erosion and Cavitation Erosion Wear Properties of Thermally Sprayed Alumina Based Coatings. Coatings 2014, 4, 18-36.

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