Microstructural Changes of Plasma Sprayed Al2O3-SiO2-ZrO2 Thermal Barrier Coatings After Isothermal Exposure

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F14%3APU110496" target="_blank" >RIV/00216305:26620/14:PU110496 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Microstructural Changes of Plasma Sprayed Al2O3-SiO2-ZrO2 Thermal Barrier Coatings After Isothermal Exposure
Original language description
Eutectic ceramic Al2O3-ZrO2-SiO2 also termed Eucor (as a top coat) and CoNiCrAlY (as bond coat) coatings were sprayed onto the surface of newly developed fine-grained cast polycrystalline nickel-based superalloy Inconel 713 LC by means of water stabilized plasma (WSP) and atmospheric plasma spraying (APS) respectively. After the spraying were all the samples annealed at the temperature of 950 C for 10 hours, and followed separately by isothermal heat treatment at 900 C for 10, 50, 100, 200 and 500 hoursin ambient atmosphere. Eucor microstructural changes and as well the changes at top coat/bond coat interface were investigated by means of scanning electron microscope with an energy dispersive microanalyzer. The microstructure of APS CoNiCrAlY bond coat consisted of flattened splats, partially unmelted particles and oxides, which were formed across splats interfaces in interaction with ambient atmosphere during spraying. The top coat near-eutectic composition allowed to form Eucor amor
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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