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Fatigue performance of TBCs on hastelioy X substrate during cyclic bending
Institute of Plasma Physics as CR, V.v.i., Prague, Czech Republic.
Institute of Plasma Physics as CR, V.v.i., Prague, Czech Republic.
Institute of Plasma Physics as CR, V.v.i., Prague, Czech Republic.
Czech Technical University in Prague, Prague, Czech Republic.
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2015 (English)In: Proceedings of the International Thermal Spray Conference / [ed] Agarwal A.,Lau Y.-C.,McDonald A.,Bolelli G.,Toma F.-L.,Concustell A.,Widener C.A.,Turunen, 2015, Vol. 1, 406-412 p.Conference paper, Published paper (Refereed)
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Abstract [en]

Our previous experiments with low-cost steel substrates confirmed that individual steps of conventional thermal barrier coating (TBC) deposition may influence fatigue properties of the coated samples differently. In this study, testing was carried out for TBC samples deposited on industrially more relevant Hastelioy X substrates. Samples were tested after each step of TBC deposition process: As-received (non- coated), grit-blasted, bond-coated (NiCoCrAlY) and bond- coated + top-coated (yttria-stabilized zirconia - YSZ). Conventional atmospheric plasma spraying (APS) with gas stabilized plasma torch was used for deposition of both bond coat and top coat. In addition, for one half of the samples, bond coat was prepared by consecutive combination of HVAF (High Velocity Air Fuel) and APS processes. Samples were tested both in as-sprayed condition and after 100 hours annealing at 980 °C, which simulated in-service conditions. Obtained results showed that different fatigue performance may be expected for various stages of the TBC deposition as well as due to the variation of the deposition process and sample temperature history. © Copyright (2015) by ASM International All rights reserved.

Place, publisher, year, edition, pages
2015. Vol. 1, 406-412 p.
Keyword [en]
Air; Deposition; Plasma spraying; Sprayed coatings; Substrates; Thermal barrier coatings; Zirconia, As-sprayed conditions; Atmospheric plasma spraying; Deposition process; Fatigue performance; Fatigue properties; Gas stabilized plasmas; High velocity air fuels; Thermal barrier coating (TBC), Yttria stabilized zirconia
National Category
Manufacturing, Surface and Joining Technology
Research subject
ENGINEERING, Manufacturing and materials engineering
Identifiers
URN: urn:nbn:se:hv:diva-9329Scopus ID: 2-s2.0-84962783945ISBN: 978-151081154-6 (print)OAI: oai:DiVA.org:hv-9329DiVA: diva2:923881
Conference
International Thermal Spray Conference and Exposition, ITSC 2015; Long Beach; United States; 11 May 2015 through 14 May 2015
Note

Conference Code:119667

Available from: 2016-04-27 Created: 2016-04-27 Last updated: 2016-04-27Bibliographically approved

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Curry, NicholasBjörklund, Stefan

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