Fatigue performance of TBCs on Hastelloy X substrate during cyclic bending

0459825 - ÚFP 2017 RIV US eng J - Journal Article
Mušálek, Radek - Kovářík, O. - Tomek, L. - Medřický, Jan - Pala, Zdeněk - Haušild, P. - Čapek, J. - Kolařík, K. - Curry, N. - Bjorklund, S.
Fatigue performance of TBCs on Hastelloy X substrate during cyclic bending.
Journal of Thermal Spray Technology. Roč. 25, 1-2 (2016), s. 231-243. ISSN 1059-9630. E-ISSN 1544-1016.
[ITSC 2015: International Thermal Spray Conference and Exposition. Long Beach, California, 11.05.2015-14.05.2015]
R&D Projects: GA ČR GB14-36566G
Institutional support: RVO:61389021
Keywords : atmospheric plasma spray * failure mechanism * fatigue * HVAF * NiCoCrAlY * thermal barrier coatings * yttria-stabilized zirconia
Subject RIV: JK - Corrosion ; Surface Treatment of Materials
Impact factor: 1.488, year: 2016
http://link.springer.com/article/10.1007%2Fs11666-015-0321-4

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 the presented study, testing was carried out for TBC samples deposited on industrially more relevant Hastelloy X substrates. Samples were tested after each step of the 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) was used for deposition of bond coat and top coat. In addition, for one half of the samples, dual-layer bond coat was prepared by combination of high-velocity air-fuel (HVAF) and APS processes. Samples were tested in the as-sprayed condition and after 100 hours annealing at 980 °C, which simulated application-relevant in-service conditions. ...
Permanent Link: http://hdl.handle.net/11104/0259981