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A comparative study on the performance of suspension plasma sprayed thermal barrier coatings with different bond coat systems
Shanghai Jiao Tong University, Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, Shanghai 200240, China .
University of Manchester, School of Materials, Grosvenor Street, Manchester M1 7HS, UK .
University West, Department of Engineering Science, Division of Mechanical Engineering. (PTW)ORCID iD: 0000-0003-0209-1332
Shanghai Jiao Tong University, Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, Shanghai 200240, China .
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2015 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 275, 276-282 p.Article in journal (Refereed) Published
Abstract [en]

The performance of suspension plasma sprayed (SPS) yttria stabilized zirconia (YSZ) thermal barrier coatings (TBCs) after isothermal treatment at 1150. °C was investigated. The NiCoCrAlY bond coats were applied by air plasma spray (APS) and high velocity oxygen fuel (HVOF) techniques. It was found that the microstructure of SPS TBCs depends on the surface morphology of the bond coat. The SPS TBCs with a rough APS bond coat exhibited a longer lifetime than those with a smooth HVOF bond coat. To understand this phenomenon, the evolution of the microstructure, mechanical properties and the residual stresses in the TBCs and TGO were systematically studied. Results showed that the surface roughness and oxidation behavior of the bond coat play dominant roles in the SPS TBC failure. © 2015.

Place, publisher, year, edition, pages
2015. Vol. 275, 276-282 p.
Keyword [en]
Air; Coatings; Isotherms; Mechanical properties; Microstructure; Plasma jets; Plasma spraying; Sprayed coatings; Stresses; Surface roughness; Yttria stabilized zirconia; Zirconia, Bond coats; Evolution of the microstructure; High velocity oxygen fuel(HVOF); Isothermal exposures; Plasma-sprayed thermal barrier coating; Suspension plasma sprays; Thermal barrier coating (TBCs); Yttria-stabilized zirconias (YSZ), Thermal barrier coatings
National Category
Manufacturing, Surface and Joining Technology Other Materials Engineering
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-7619DOI: 10.1016/j.surfcoat.2015.05.006ISI: 000357753900039Scopus ID: 2-s2.0-84930866710OAI: oai:DiVA.org:hv-7619DiVA: diva2:815895
Note

Available online 11 May 2015

Available from: 2015-06-02 Created: 2015-05-30 Last updated: 2017-12-04Bibliographically approved

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Curry, NicholasNylén, Per

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