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

Result code in 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>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Changes in Microstructure of Air Plasma Sprayed MCrAlY Coatings After Short Thermal Exposure in Argon Atmosphere
Original language description
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
Czech name
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Czech description
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Project
<a href="/en/project/FR-TI1%2F099" target="_blank" >FR-TI1/099: *Research and development leading to innovation of small turbine engines.</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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