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Wetting properties of ceramic reinforced metal matrix composites on varied roughness profiles
BITS Pilani, Pilani, India.
BITS Pilani, Pilani, India.
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-9578-4076
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-6929-3310
2017 (English)In: Proceedings of the International Thermal Spray Conference & Exposition (ITSC 2017), New York: Curran Associates, Inc. , 2017, Vol. 1, p. 537-542Conference paper, Published paper (Refereed)
Abstract [en]

Superhydrophobic surfaces are of great importance in many industrial applications, especially where components are exposed to wet environments and low temperatures.Texturing of surfaces to reach superhydrophobicity can be achieved by thermal spraying technology, which is an attractive coating method as it is cheap, flexible and can employ a large range of feedstock materials. In this study, ceramic reinforced metal matrix composite (WC-CoCr) powders were sprayed using High Velocity Air Fuel method. They were varied based on their powder parameters such as carbide grain size, binder grain size and powder strength. The purpose was to investigate their hydrophobic characteristics and how these are influenced by different roughness profiles. The wetting properties such as contact angle and contact angle hysteresis were first investigated for the as-sprayed coatings. The roughness properties and Hausdorff Dimension were then related to the wetting properties. Aside from as-sprayed coatings, the effect of roughness and inherent wetting characteristics were studied by investigating the coating surface after grit blasting and polishing. Results show that powder parameters can lead to designing surfaces with higher surface roughnesses and thus having higher contact angles. It was also shown that surface composition of cermets has an impact on wettability, with the binder accounting for wetting characteristics and carbides accounting for roughness. 

Place, publisher, year, edition, pages
New York: Curran Associates, Inc. , 2017. Vol. 1, p. 537-542
Keywords [en]
Air, Binders, Carbides, Ceramic materials, Ceramic matrix composites, Contact angle, Grain size and shape, Hydrophobicity, Metallic matrix composites, Powder metals, Reinforcement, Sprayed coatings, Surface roughness, Thermal spraying, Contact angle hysteresis, Feedstock materials, Hausdorff dimension, High velocity air fuels, Reinforced metal matrix composites, Super-hydrophobic surfaces, Thermal spraying technology, Wetting characteristics, Wetting
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering; Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-13052Scopus ID: 2-s2.0-85047543530ISBN: 9781510858220 (print)OAI: oai:DiVA.org:hv-13052DiVA, id: diva2:1259251
Conference
International Thermal Spray Conference and Exposition, ITSC 2017, Dusseldorf, Germany, 7-9 June, 2017
Available from: 2018-10-29 Created: 2018-10-29 Last updated: 2019-01-10Bibliographically approved

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Markocsan, NicolaieLyphout, Christophe

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