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Multilayered suspension plasma sprayed thermal barrier coatings for high temperature gas turbine applications
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-2857-0975
University West, Department of Engineering Science, Division of Subtractive and Additive Manufacturing. (PTW)ORCID iD: 0000-0002-9578-4076
Oerlikon Metco, Westbury, USA.
Oerlikon Metco, Westbury, USA.
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2017 (English)In: ISTC 2017: International Thermal Spray Conference & Exposition : abstracts (including proceedings on USB stick), Düsseldorf: DVS Media , 2017, p. 1-6Conference paper, Published paper (Refereed)
Abstract [en]

Improvement in the performance of thermal barrier coating systems (TBCs) is one of the key objectives for further development of gas turbine applications. The material most commonly used as TBC topcoat is yttria stabilised zirconia (YSZ). However, the usage of YSZ is limited by the operating temperature range which in turn restricts the engine efficiency. Materials such as pyrochlores, perovskites, rare earth garnets, etc. are suitable candidates which could replace YSZ as they exhibit lower thermal conductivity and higher phase stability at elevated temperatures.The objective of this work was to investigate different multi-layered TBCs consisting of advanced topcoat materials fabricated by Suspension Plasma Spraying (SPS). The investigated topcoat materials were YSZ, dysprosia stabilised zirconia, gadolinium zirconiate, cerium doped YSZ and yttria fully stabilised zirconia. All topcoats were deposited with TriplexPro-210 plasma spray gun and radial injection of suspension. Lifetime of these samples was examined by thermal cyclic fatigue and thermal shock testing. Microstructure analysis of as-sprayed and failed specimens was performed with scanning electron microscope. The failure mechanisms in each case have been discussed in this article. The results show that SPS could be a promising route to produce multilayered TBCs for high temperature applications.

Place, publisher, year, edition, pages
Düsseldorf: DVS Media , 2017. p. 1-6
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-11940ISBN: 978-3-96144-000-9 (print)OAI: oai:DiVA.org:hv-11940DiVA, id: diva2:1167970
Conference
International Thermal Spray Conference 2017, June 7-9, Dusseldorf, Germany
Available from: 2017-12-19 Created: 2017-12-19 Last updated: 2017-12-27Bibliographically approved

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Gupta, Mohit KumarMarkocsan, Nicolaie

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