Changes in Microstructure of Air Plasma Sprayed MCrAlY Coatings After Short Thermal Exposure in Argon Atmosphere

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F10%3APU88234" target="_blank" >RIV/00216305:26210/10:PU88234 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Changes in Microstructure of Air Plasma Sprayed MCrAlY Coatings After Short Thermal Exposure in Argon Atmosphere

Popis výsledku v původním jazyce

Two NiCrAlY and CoNiCrAlY powders were used to produce the MCrAlY type of coatings by means of conventional thermal air plasma spraying on Inconel 713LC nickel-based superalloy substrate. After spraying, an initial state of both types of coatings consisted of the beta-NiAl intermediate phase, gamma-Ni solid solution and it also included a certain amount of imperfectly melted powder particles, voids and Al2O3 oxide particles. The coatings were annealed for two hours at wide range of the temperatures (650, 800, 1000 and 1150oC) in argon-flow atmosphere. After this short thermal exposure the changes in the microstructures were studied in detail. It was found that the temperature influences the coatings microstructure significantly. On the other hand, it has only minor effect on the coatings thickness, which is almost equal to its initial state value. At high temperatures, the oxide scale is formed by internal oxidation being the most detrimental mechanism. In the consequence, the beta-NiA

Název v anglickém jazyce

Changes in Microstructure of Air Plasma Sprayed MCrAlY Coatings After Short Thermal Exposure in Argon Atmosphere

Popis výsledku anglicky

Two NiCrAlY and CoNiCrAlY powders were used to produce the MCrAlY type of coatings by means of conventional thermal air plasma spraying on Inconel 713LC nickel-based superalloy substrate. After spraying, an initial state of both types of coatings consisted of the beta-NiAl intermediate phase, gamma-Ni solid solution and it also included a certain amount of imperfectly melted powder particles, voids and Al2O3 oxide particles. The coatings were annealed for two hours at wide range of the temperatures (650, 800, 1000 and 1150oC) in argon-flow atmosphere. After this short thermal exposure the changes in the microstructures were studied in detail. It was found that the temperature influences the coatings microstructure significantly. On the other hand, it has only minor effect on the coatings thickness, which is almost equal to its initial state value. At high temperatures, the oxide scale is formed by internal oxidation being the most detrimental mechanism. In the consequence, the beta-NiA

Druh

O - Ostatní výsledky

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/FR-TI1%2F099" target="_blank" >FR-TI1/099: *Výzkum a vývoj vedoucí k inovaci malých turbínových motorů.</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2010

Kód důvěrnosti údajů

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