Publication detail

Failure of Gadolinium Zirconate and Yttria Stabilized Zirconia Thermal Barrier Coatings Subjected to High Temperature Calcia-Magnesia-Alumino-Sisicate Attack

ČELKO, L. JECH, D. TKACHENKO, S. KOMAROV, P. REMEŠOVÁ, M. SLÁMEČKA, K. CTIBOR, P.

Original Title

Failure of Gadolinium Zirconate and Yttria Stabilized Zirconia Thermal Barrier Coatings Subjected to High Temperature Calcia-Magnesia-Alumino-Sisicate Attack

Type

conference paper

Language

English

Original Abstract

Nowadays, the contribution of rare-earth oxide compounds is extensively investigated with the aim to improve the service life of gas turbine engine components protected by thermal barrier coatings (TBCs) against the environmental Calcia-Magnesia-Alumino-Silicate (CMAS) attack. Therefore, the TBCs consisting of NiCrAlY bond coat, Yttria Stabilized Zirconia (YSZ) and/or mixture of YSZ and Gadolinium Zirconate (YSZ+GZ) interlayers, and a GZ top coat, which were all deposited by atmospheric plasma spraying onto the nickel-based superalloy substrates, are introduced in this contribution. The CMAS-attack resistance was evaluated using an indirect method. Firstly, the htin layer of CMAS prepared from colloidal solutions was deposited onto the top coat surface and, after drying, the samples were heat treated with the aim to glassified the CMAS. Secondly, the coated samples containing CMAS glass debris were subjected to rapid heating (up to 1200 °C) and enforced cooling cycles at the burner-rig test device and the failure of TBC was investigated. In all cases, the failure mechanism due to the CMAS attack was the top coat spallation. The functional graded TBC was found to be the most resistant system.

Keywords

Atmospheric Plasma Spraying; Thermal Barrier Coatings; Gadolinium Zirconate; Calcia-Magnesia-Alumino-Silicate Glass; High Temperature

Authors

ČELKO, L.; JECH, D.; TKACHENKO, S.; KOMAROV, P.; REMEŠOVÁ, M.; SLÁMEČKA, K.; CTIBOR, P.

Released

19. 2. 2020

Publisher

Elsevier

Location

Nizozemsko

ISBN

978-80-214-5760-7

Book

MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE

ISBN

2452-3216

Periodical

Procedia Structural Integrity

Year of study

23

Number

1

State

Republic of Italy

Pages from

360

Pages to

365

Pages count

6

URL

https://www.sciencedirect.com/science/article/pii/S2452321620301797

Full text in the Digital Library

http://hdl.handle.net/11012/186779

BibTex

@inproceedings{BUT163430,
  author="Ladislav {Čelko} and David {Jech} and Serhii {Tkachenko} and Pavel {Komarov} and Michaela {Remešová} and Karel {Slámečka} and Pavel {Ctibor}",
  title="Failure of Gadolinium Zirconate and Yttria Stabilized Zirconia Thermal Barrier Coatings Subjected to High Temperature Calcia-Magnesia-Alumino-Sisicate Attack",
  booktitle="MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE",
  year="2020",
  journal="Procedia Structural Integrity",
  volume="23",
  number="1",
  pages="360--365",
  publisher="Elsevier",
  address="Nizozemsko",
  doi="10.1016/j.prostr.2020.01.113",
  isbn="978-80-214-5760-7",
  issn="2452-3216",
  url="https://www.sciencedirect.com/science/article/pii/S2452321620301797"
}