This title appears in the Scientific Report : 2020 

Thermal Cycling Performances of Multilayered Yttria Stabilized Zirconia/Gadolinium Zirconate Thermal Barrier Coatings
Zhou, Dapeng (Corresponding author)
Mack, Daniel Emil / Bakan, Emine / Mauer, Georg / Sebold, Doris / Guillon, Olivier / Vaßen, Robert
Werkstoffsynthese und Herstellungsverfahren; IEK-1
JARA-ENERGY; JARA-ENERGY
Journal of the American Ceramic Society, 103 (2020) 3, S. 2048-2061
Westerville, Ohio Soc. 2020
10.1111/jace.16862
Journal Article
Methods and Concepts for Material Development
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Published on 2019-10-20. Available in OpenAccess from 2020-10-20.
Published on 2019-10-20. Available in OpenAccess from 2020-10-20.
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Please use the identifier: http://dx.doi.org/10.1111/jace.16862 in citations.
Please use the identifier: http://hdl.handle.net/2128/23839 in citations.
Gadolinium zirconate (Gd2Zr2O7, GZO) as an advanced thermal barrier coating (TBC) material, has lower thermal conductivity, better phase stability, sintering resistance, and calcium‐magnesium‐alumino‐silicates (CMAS) attack resistance than yttria‐stabilized zirconia (YSZ, 6‐8 wt%) at temperatures above 1200°C. However, the drawbacks of GZO, such as the low fracture toughness and the formation of deleterious interphases with thermally grown alumina have to be considered for the application as TBC. Using atmospheric plasma spraying (APS) and suspension plasma spraying (SPS), double‐layered YSZ/GZO TBCs, and triple‐layered YSZ/GZO TBCs were manufactured. In thermal cycling tests, both multilayered TBCs showed a significant longer lifetime than conventional single‐layered APS YSZ TBCs. The failure mechanism of TBCs in thermal cycling test was investigated. In addition, the CMAS attack resistance of both TBCs was also investigated in a modified burner rig facility. The triple‐layered TBCs had an extremely long lifetime under CMAS attack. The failure mechanism of TBCs under CMAS attack and the CMAS infiltration mechanism were investigated and discussed.