This title appears in the Scientific Report : 2019 

Performance of YSZ and Gd2Zr2O7/YSZ double layer thermal barrier coatings in burner rig tests
Vaßen, Robert (Corresponding author)
Bakan, Emine / Mack, Daniel / Schwartz-Lückge, Sigrid / Sebold, Doris / Sohn, Yoo Jung / Zhou, Dapeng / Guillon, Olivier
Werkstoffsynthese und Herstellungsverfahren; IEK-1
JARA-ENERGY; JARA-ENERGY
Journal of the European Ceramic Society, 40 (2020) 2, S. 480-490
Amsterdam [u.a.] Elsevier Science 2020
10.1016/j.jeurceramsoc.2019.10.021
Journal Article
Methods and Concepts for Material Development
Published on 2019-10-13. Available in OpenAccess from 2021-10-13.
Published on 2019-10-13. Available in OpenAccess from 2021-10-13.
Please use the identifier: http://hdl.handle.net/2128/23715 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.jeurceramsoc.2019.10.021 in citations.
Double layer thermal barrier coatings (TBCs) consisting of a Gd2Zr2O7 (GZO) top and an ytrria stabilized zirconia (YSZ) interlayer have been tested in a burner rig facility and the results compared to the ones of conventional YSZ single layers. In order to gain insight in the high temperature capability of the alternative TBC material, high surface temperatures of up to 1550 °C have been chosen while keeping the bond coat temperature similar. It turned out that the performance of all systems is largely depending on the microstructure of the coatings especially reduced porosity levels of GZO being detrimental. In addition, it was more difficult in GZO than in YSZ coatings to obtain highly porous and still properly bonded microstructures. Another finding was the reduced lifetime with increasing surface temperatures, the amount of reduction is depending on the investigated system. The reasons for this behavior are analyzed and discussed in detail.