Publication detail

Thermal cycling behaviour of plasma-sprayed thermal barrier coatings with pre-oxidized NiCrAlY and NiCoCrAlY bond-coats

SLÁMEČKA, K. JECH, D. KLAKURKOVÁ, L. TKACHENKO, S. REMEŠOVÁ, M. GEJDOŠ, P. ČELKO, L.

Original Title

Thermal cycling behaviour of plasma-sprayed thermal barrier coatings with pre-oxidized NiCrAlY and NiCoCrAlY bond-coats

Type

conference paper

Language

English

Original Abstract

This contribution deals with thermal cycling of thermal barrier coatings (TBCs) with NiCrAlY and NiCoCrAlY bond-coats, and yttria stabilized zirconia (YSZ) top-coat that were prepared by atmospheric plasma spraying from commercial powders. The samples were pre-oxidized, based on isothermal oxidation of the two bond-coats, in order to diminish the influence of residual stresses after spraying on thermal cycling experiments. Surface topographies of both bond-coats were measured using optical profilometry and several surface parameters were evaluated to characterize them. Microstructural degradation caused by thermal cycling was examined by scanning electron microscopy with an emphasis on the role of bond-coat surface features on local damage mechanisms. An important micromechanism for TBCs with the NiCoCrAlY bond-coat was multiple parallel cracking of the TGO layer that was likely also responsible for lower endurance of these coatings.

Keywords

Thermal barrier coatings; Bond-coat; Plasma spray; Roughness; Oxidation; Thermal cycling

Authors

SLÁMEČKA, K.; JECH, D.; KLAKURKOVÁ, L.; TKACHENKO, S.; REMEŠOVÁ, M.; GEJDOŠ, P.; ČELKO, L.

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

439

Pages to

444

Pages count

6

URL

https://www.sciencedirect.com/science/article/pii/S245232162030192X

Full text in the Digital Library

http://hdl.handle.net/11012/193513

BibTex

@inproceedings{BUT163208,
  author="Karel {Slámečka} and David {Jech} and Lenka {Klakurková} and Serhii {Tkachenko} and Michaela {Remešová} and Pavel {Gejdoš} and Ladislav {Čelko}",
  title="Thermal cycling behaviour of plasma-sprayed thermal barrier coatings with pre-oxidized NiCrAlY and NiCoCrAlY bond-coats",
  booktitle="MATERIALS STRUCTURE & MICROMECHANICS OF FRACTURE",
  year="2020",
  journal="Procedia Structural Integrity",
  volume="23",
  number="1",
  pages="439--444",
  publisher="Elsevier",
  address="Nizozemsko",
  doi="10.1016/j.prostr.2020.01.126",
  isbn="978-80-214-5760-7",
  issn="2452-3216",
  url="https://www.sciencedirect.com/science/article/pii/S245232162030192X"
}