Detail publikačního výsledku

Bending fatigue failure of atmospheric-plasma-sprayed CoNiCrAlY + YSZ thermal barrier coatings

SLÁMEČKA, K.; ČELKO, L.; SKALKA, P.; POKLUDA, J.; NĚMEC, K.; JULIŠ, M.; KLAKURKOVÁ, L.; ŠVEJCAR, J.

Originální název

Bending fatigue failure of atmospheric-plasma-sprayed CoNiCrAlY + YSZ thermal barrier coatings

Anglický název

Bending fatigue failure of atmospheric-plasma-sprayed CoNiCrAlY + YSZ thermal barrier coatings

Druh

Článek WoS

Originální abstrakt

Bending fatigue failure of conventional atmospheric-plasma-sprayed CoNiCrAlY + ZrO2–8 wt.% Y2O3 thermal barrier coatings with/without the thermally grown oxide layer generated between the bond coat and the top coat was experimentally studied at room temperature. Microscopical and profilometrical characterization of as-received and fractured specimens and a simplified finite element study of cooling thermal stresses show that the same fatigue strength of both the as-coated and the oxidized specimens (i.e. its insensitivity to the presence of the thermally grown oxide) is most likely caused by a preferential through-the-thickness cracking of the thermally grown oxide layer. Moreover, the bond-coat/substrate interface is identified as the weakest part of the studied thermal barrier system under both low and high crack growth rates.

Anglický abstrakt

Bending fatigue failure of conventional atmospheric-plasma-sprayed CoNiCrAlY + ZrO2–8 wt.% Y2O3 thermal barrier coatings with/without the thermally grown oxide layer generated between the bond coat and the top coat was experimentally studied at room temperature. Microscopical and profilometrical characterization of as-received and fractured specimens and a simplified finite element study of cooling thermal stresses show that the same fatigue strength of both the as-coated and the oxidized specimens (i.e. its insensitivity to the presence of the thermally grown oxide) is most likely caused by a preferential through-the-thickness cracking of the thermally grown oxide layer. Moreover, the bond-coat/substrate interface is identified as the weakest part of the studied thermal barrier system under both low and high crack growth rates.

Klíčová slova

Thermal barrier coatings, Fatigue, Crack path, FEM

Klíčová slova v angličtině

Thermal barrier coatings, Fatigue, Crack path, FEM

Autoři

SLÁMEČKA, K.; ČELKO, L.; SKALKA, P.; POKLUDA, J.; NĚMEC, K.; JULIŠ, M.; KLAKURKOVÁ, L.; ŠVEJCAR, J.

Rok RIV

2016

Vydáno

01.01.2015

ISSN

0142-1123

Periodikum

International Journal of Fatigue

Svazek

70

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

186

Strany do

195

Strany počet

10

BibTex

@article{BUT110074,
  author="Karel {Slámečka} and Ladislav {Čelko} and Petr {Skalka} and Jaroslav {Pokluda} and Karel {Němec} and Martin {Juliš} and Lenka {Klakurková} and Jiří {Švejcar}",
  title="Bending fatigue failure of atmospheric-plasma-sprayed CoNiCrAlY + YSZ thermal barrier coatings",
  journal="International Journal of Fatigue",
  year="2015",
  volume="70",
  number="1",
  pages="186--195",
  doi="10.1016/j.ijfatigue.2014.09.009",
  issn="0142-1123"
}