| Download | - View accepted manuscript: Mechanical Behavior of Air Plasma-Sprayed YSZ Functionally Graded Mullite Coatings Investigated via Instrumented Indentation (PDF, 875 KiB)
- View supplementary information: Mechanical Behavior of Air Plasma-Sprayed YSZ Functionally Graded Mullite Coatings Investigated via Instrumented Indentation (PDF, 477 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1007/s11666-010-9586-9 |
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| Author | Search for: Cojocaru, C. V.1; Search for: Wang, Y.1; Search for: Moreau, C.1; Search for: Lima, R. S.1; Search for: Mesquita-Guimaraes, J.; Search for: Garcia, E.; Search for: Miranzo, P.; Search for: Osendi, M. I. |
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| Affiliation | - National Research Council of Canada. NRC Industrial Materials Institute
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| Format | Text, Article |
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| Subject | elastic modulus; environmental barrier coatings; heat-treatment; mullite; water vapor; YSZ |
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| Abstract | Yttria-stabilized zirconia (YSZ)-mullite multilayer architectures with compositional grading between the bond coat and YSZ top coat are envisioned as solutions to ease their coefficient of thermal expansion mismatch induced stress. In this work, two different types of mullite powder (spray-dried and freezegranulated) and a mullite-YSZ 75/25 vol.% mixture spray-dried powder were employed. Using instrumented indentation with loads between 10 and 500 mN, the role of the powder characteristics on the mechanical behavior of air plasma-sprayed mullite bond coats deposited on SiC substrates was investigated. Hardness (H) and elastic modulus (E) were measured for the as-sprayed coatings and for coatings heat-treated at 1300 C, in water vapor environment, for periods up to 500 h. Both H and E values of the coatings are found to be highly dependent on the size distribution of the starting powders. It is aimed the fabrication of an efficient and cost-effective EBC prototype based on YSZ compositionally graded mullite. |
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| Publication date | 2010-11-13 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRCC 53833
IMI-133213
NRCC 52511
IMI-132044 |
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| NPARC number | 16885325 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 92b40d54-8af2-4a96-8044-f0d91fda22c4 |
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| Record created | 2011-02-17 |
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| Record modified | 2020-04-17 |
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