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

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Investigation of Changes in Microstructure of Remelted Air Plasma Sprayed NiCrAlY Coating after Thermal Exposure in Air with the Assistance of Microhardness Measurements
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/GAP107%2F12%2F1922" target="_blank" >GAP107/12/1922: Thermal Spray Processing and High Temperature Structural Stability of Nanocrystalline Thermal Barrier Coatings</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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