Publication detail
MIKROSTRUCTURAL CHANGES OF AIR PLASMA SPRAYED CoNiCrAlY COATING AFTER REMELTING
ŘIČÁNKOVÁ, V. ČELKO, L. KLAKURKOVÁ, L. ŠVEJCAR, J.
Czech title
MIKROSTRUCTURAL CHANGES OF AIR PLASMA SPRAYED CoNiCrAlY COATING AFTER REMELTING
English title
MIKROSTRUCTURAL CHANGES OF AIR PLASMA SPRAYED CoNiCrAlY COATING AFTER REMELTING
Type
conference paper
Language
en
Original abstract
The samples in present study were prepared by air plasma spraying (APS) of CoNiCrAlY coatings onto the nickel-based superalloy INCONEL 713LC substrate surface. Immediately, after the spraying was onto the CoNiCrAlY coatings outer surface pressed an high purity aluminium sheet by means of uniaxial cold pressing techniue. After that the samples were annealed at the temperature of 650 C for different dwell-time in argon-flow atmosphere. The modified CoNiCrAlY coatings enriched by aluminium were produced. Moreover the voids, imperfectly melted powder particles, and oxide scale present in original plasma sprayed coating microstructure were eliminated. The scanning electron microscope (SEM) was used to record the modified coatings microstructure. Changes in chemical composition were studied by means of energy dispersive microanalysis (EDX).
Czech abstract
V rámci této studie byly pozorovány změny v mikrostruktuře modifikovaného komerčně dostupného povlaku CoNiCrAlY připraveného pomocí technologie APS, s ohledem na jeho oxidační odolnost. Modifikace spočívala v sycení plazmou nanesených CoNiCrAlY povlaků hliníkem za jeho současného přetavování, které vedlo k eliminaci nežádoucího podílu oxidických vměstků v mikrostruktuře povlaku vyplývajícího z použité technologie jejich depozice. Cílem práce bylo především detailní pozorování vzájemných interakcí jednotlivých prvků a fázových transformací probíhajících v průběhu přípravy povlaků tohoto typu v průběžné ochranné argonové atmosféře v rozsahu teplot 650 C po dobu 0, 2, 5 hodin. Dále pak byly sledovány strukturní změny v průběhu modifikace původního povlaku způsobené objemovou difuzí reaktivních prvků. V konečném důsledku by tato modifikace komerčně dostupného povlaku CoNiCrAlY měla přispět ke zvýšení oxidační odolnosti tohoto typu povlaku.
English abstract
The samples in present study were prepared by air plasma spraying (APS) of CoNiCrAlY coatings onto the nickel-based superalloy INCONEL 713LC substrate surface. Immediately, after the spraying was onto the CoNiCrAlY coatings outer surface pressed an high purity aluminium sheet by means of uniaxial cold pressing techniue. After that the samples were annealed at the temperature of 650 C for different dwell-time in argon-flow atmosphere. The modified CoNiCrAlY coatings enriched by aluminium were produced. Moreover the voids, imperfectly melted powder particles, and oxide scale present in original plasma sprayed coating microstructure were eliminated. The scanning electron microscope (SEM) was used to record the modified coatings microstructure. Changes in chemical composition were studied by means of energy dispersive microanalysis (EDX).
Keywords in Czech
CoNiCrAlY; difuze; povrchové úpravy; intermetalika
Keywords in English
M-CrAlY coatings, air plasma spraying, heat treatment, remelting, microstructure
RIV year
2012
Released
25.05.2012
Publisher
TANGER Ltd.
Location
Ostrava
ISBN
978-80-87294-29-1
Book
METAL 2012 Conference proceedings
Edition number
1
Pages from–to
442–447
Pages count
6
BIBTEX
@inproceedings{BUT92143,
author="Veronika {Řičánková} and Ladislav {Čelko} and Lenka {Klakurková} and Jiří {Švejcar},
title="MIKROSTRUCTURAL CHANGES OF AIR PLASMA SPRAYED CoNiCrAlY COATING AFTER REMELTING",
booktitle="METAL 2012 Conference proceedings",
year="2012",
month="May",
pages="442--447",
publisher="TANGER Ltd.",
address="Ostrava",
isbn="978-80-87294-29-1"
}