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Effect of spray parameters on the microstructure and porosity content of gadolinium zirconate TBCs deposited by suspension plasma spray
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0003-2475-9284
Institute of Energy and Climate Research (IEK-1), Forschungszentrum Jülich GmbH, Germany.
Institute of Energy and Climate Research (IEK-1), Forschungszentrum Jülich GmbH, Germany.
2017 (English)In: Proceedings of the International Thermal Spray Conference, 2017, DVS 336, 2017, p. 31-35, article id DVS336Conference paper, Oral presentation only (Other academic)
Abstract [en]

Gadolinium zirconate (GZ) is considered as a promising top coat candidate for high temperature(>1200°C) thermal barrier coating (TBC) applications. Suspension plasma spray (SPS) technique has shown the capability to generate a wide range of microstructures which includes the more desirable columnar microstructure. In this study, GZ single layer TBCs were deposited by axial SPS process. The variable parameters include the standoff distance, solid load content of the suspension and input power. The cross section and top surface of theas sprayed TBCs were analyzed by SEM. The phase content in the as sprayed TBCs was analyzed by XRD. The porosity content of the as sprayed TBCs was measured using image analysis. In the SEM analysis, it was observed that a lower solid load content in the suspension favoured the formation of a columnar microstructure. Additionally, at lower solid load content, increase in standoff distance resulted in columnar microstructure with high porosity content in the TBC. However,with higher solid content suspension and alteration of input power, only adense vertical cracked microstructure can be obtained.                 

Place, publisher, year, edition, pages
2017. p. 31-35, article id DVS336
Keywords [en]
Plasma spray, parameters, top coat
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering; Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-11924ISBN: 9781510858220 (print)OAI: oai:DiVA.org:hv-11924DiVA, id: diva2:1166051
Conference
International Thermal Spray Conference and Exposition 2017 Thermal Spray paves the Way to the Stars! , ITSC 2017, June 7 to June 9, 2017 Düsseldorf, Germany
Available from: 2017-12-14 Created: 2017-12-14 Last updated: 2018-10-25Bibliographically approved

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Mahade, Satyapal

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CiteExportLink to record
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