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Performance Testing of Suspension Plasma Sprayed Thermal Barrier Coatings Produced with Varied Suspension Parameters
University West, Department of Engineering Science, Division of Manufacturing Processes. Treibacher Industrie AG, Althofen 9330, Austria. (PTW)ORCID iD: 0000-0003-0209-1332
Progressive Surface, Grand Rapids, MI 49512, USA.
Progressive Surface, Grand Rapids, MI 49512, USA.
Treibacher Industrie AG, Althofen 9330, Austria.
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2015 (English)In: Coatings, ISSN 2079-6412, Vol. 5, no 3, p. 338-356Article in journal (Refereed) Published
Abstract [en]

Suspension plasma spraying has become an emerging technology for the production of thermal barrier coatings for the gas turbine industry. Presently, though commercial systems for coating production are available, coatings remain in the development stage. Suitable suspension parameters for coating production remain an outstanding question and the influence of suspension properties on the final coatings is not well known. For this study, a number of suspensions were produced with varied solid loadings, powder size distributions and solvents. Suspensions were sprayed onto superalloy substrates coated with high velocity air fuel (HVAF) -sprayed bond coats. Plasma spray parameters were selected to generate columnar structures based on previous experiments and were maintained at constant to discover the influence of the suspension behavior on coating microstructures. Testing of the produced thermal barrier coating (TBC) systems has included thermal cyclic fatigue testing and thermal conductivity analysis. Pore size distribution has been characterized by mercury infiltration porosimetry. Results show a strong influence of suspension viscosity and surface tension on the microstructure of the produced coatings.

Place, publisher, year, edition, pages
2015. Vol. 5, no 3, p. 338-356
Keywords [en]
Thermal barrier coating, suspension plasma spray, columnar coating, suspension viscosity, thermo-cyclic fatigue, thermal conductivity
National Category
Manufacturing, Surface and Joining Technology
Research subject
Production Technology
Identifiers
URN: urn:nbn:se:hv:diva-9046DOI: 10.3390/coatings5030338OAI: oai:DiVA.org:hv-9046DiVA, id: diva2:901482
Available from: 2016-02-08 Created: 2016-02-08 Last updated: 2019-05-14Bibliographically approved

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