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Failure Analysis of Multilayered Suspension Plasma-Sprayed Thermal Barrier Coatings for Gas Turbine Applications
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för avverkande och additativa tillverkningsprocesser (AAT). (PTW)ORCID-id: 0000-0002-4201-668X
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för avverkande och additativa tillverkningsprocesser (AAT). (PTW)ORCID-id: 0000-0002-9578-4076
Oerlikon Metco, Westbury, USA.
Oerlikon Metco, Westbury, USA.
Vise andre og tillknytning
2018 (engelsk)Inngår i: Journal of thermal spray technology (Print), ISSN 1059-9630, E-ISSN 1544-1016, Vol. 27, nr 3, s. 402-411-Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Improvement in the performance of thermal barrier coatings (TBCs) is one of the key objectives for further development of gas turbine applications. The material most commonly used as TBC topcoat is yttria-stabilized 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 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 multilayered TBCs consisting of advanced topcoat materials fabricated by suspension plasma spraying (SPS). The investigated topcoat materials were YSZ, dysprosia-stabilized zirconia, gadolinium zirconate, and ceria–yttria-stabilized zirconia. All topcoats were deposited by TriplexPro-210TM 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.

sted, utgiver, år, opplag, sider
2018. Vol. 27, nr 3, s. 402-411-
HSV kategori
Forskningsprogram
TEKNIK, Produktions- och materialteknik
Identifikatorer
URN: urn:nbn:se:hv:diva-11978DOI: 10.1007/s11666-017-0683-xISI: 000425622500014Scopus ID: 2-s2.0-85039851194OAI: oai:DiVA.org:hv-11978DiVA, id: diva2:1172790
Forskningsfinansiär
Knowledge Foundation
Merknad

First Online: 02 January 2018

Tilgjengelig fra: 2018-01-10 Laget: 2018-01-10 Sist oppdatert: 2019-03-06bibliografisk kontrollert

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