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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F14%3APU107790" target="_blank" >RIV/00216305:26210/14:PU107790 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.scientific.net/KEM.586.226" target="_blank" >http://www.scientific.net/KEM.586.226</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.586.226" target="_blank" >10.4028/www.scientific.net/KEM.586.226</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

<a href="/cs/project/GAP107%2F12%2F1922" target="_blank" >GAP107/12/1922: Žárový proces přípravy a vysokoteplotní strukturní stabilita nanokrystalických termálních bariér</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Key Engineering Materials

ISBN

9783037859346

ISSN

1013-9826

e-ISSN

—

Počet stran výsledku

4

Strana od-do

226-229

Název nakladatele

Trans Tech Publications Ltd

Místo vydání

Zurich-Durnten, Switzerland

Místo konání akce

Brno

Datum konání akce

1. 7. 2013

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000336633500055