Detail publikace

Investigation of Changes in Microstructure of Remelted Air Plasma Sprayed NiCrAlY Coating after Thermal Exposure in Air with the Assistance of Microhardness Measurements

ŘIČÁNKOVÁ, V. ČELKO, L. ŠVEJCAR, J.

Originální název

Investigation of Changes in Microstructure of Remelted Air Plasma Sprayed NiCrAlY Coating after Thermal Exposure in Air with the Assistance of Microhardness Measurements

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

In present work, the NiCrAlY coatings were sprayed onto the surface of nickel-based superalloy INCONEL 713LC substrates by means of conventional air plasma spray technique. Subsequently an aluminium sheet was cladded onto the coating surface by means of uniaxial cold pressing. The samples prepared by this way were annealed at the temperatures of 650, 850 and 1000oC for two hours in argon-flow atmosphere. NiCrAlY coatings were enriched by aluminium and the coating imperfections presented in a coating were eliminated. The remelted NiCrAlY coating specimens were annealed at a temperature of 800oC for fifty hours in ambient atmosphere. The microstructural changes and phase transformations after short thermal exposure in air of the remelted NiCrAlY plasma sprayed coatings were observed. Generally, a change was observed in the phase composition of remelted coatings from phases rich in aluminium to phases less rich in aluminium owing to thermal exposure in air. The increase in the microhardness of the whole remelted coating after thermal exposure was caused by the increase in the amount of Al3Ni2 intermetallic phase in the remelted coating.

Klíčová slova

Ni-CrAlY coatings, remelting, air plasma spraying, heat treatment, superalloys

Autoři

ŘIČÁNKOVÁ, V.; ČELKO, L.; ŠVEJCAR, J.

Rok RIV

2014

Vydáno

12. 2. 2014

Nakladatel

Trans Tech Publications Ltd

Místo

Zurich-Durnten, Switzerland

ISBN

9783037859346

Kniha

Key Engineering Materials

ISSN

1013-9826

Periodikum

Key Engineering Materials (print)

Ročník

2014

Číslo

586

Stát

Švýcarská konfederace

Strany od

226

Strany do

229

Strany počet

4

URL

http://www.scientific.net/KEM.586.226

BibTex

@inproceedings{BUT105550,
  author="Veronika {Řičánková} and Ladislav {Čelko} and Jiří {Švejcar}",
  title="Investigation of Changes in Microstructure of Remelted Air Plasma Sprayed NiCrAlY Coating after Thermal Exposure in Air with the Assistance of Microhardness Measurements",
  booktitle="Key Engineering Materials",
  year="2014",
  journal="Key Engineering Materials (print)",
  volume="2014",
  number="586",
  pages="226--229",
  publisher="Trans Tech Publications Ltd",
  address="Zurich-Durnten, Switzerland",
  doi="10.4028/www.scientific.net/KEM.586.226",
  isbn="9783037859346",
  issn="1013-9826",
  url="http://www.scientific.net/KEM.586.226"
}