| Download | - View accepted manuscript: Phase formation and transformation in alumina/YSZ nanocomposite coating deposited by suspension plasma spray process (PDF, 791 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1007/s11666-009-9461-8 |
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| Author | Search for: Tarasi, F.; Search for: Medraj, M.; Search for: Dolatabadi, A.; Search for: Oberste-Berghaus, J.1; Search for: Moreau, C.1 |
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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 | alumina/yttria-stabilized zirconia; amorphous phase; ceramic composite coating; crystalline structure; suspension plasma spray; thermal changes |
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| Abstract | Suspension Plasma Spray process was used for deposition of pseudo-eutectic composition of aluminayttria- stabilized zirconia as a potential thermal barrier coating using Mettech axial III torch. Process variables including feed and plasma parameters were altered to find their effects on the formation of phases in the composite coating. The in-flight particle velocity was found to be the crucial parameter on phase formation in the resulting coatings. Low particle velocities below 650 m/s result in the formation of stable phases i.e., a-alumina and tetragonal zirconia. In contrast, high particle velocities more than 750 m/s favor the metastable c-alumina and cubic zirconia phases as dominant structures in as-deposited coatings. Accordingly, the plasma auxiliary gas and plasma power as influential parameters on the particle velocity were found to be reliable tools in controlling the resulting coating structure thus, the consequent properties. The noncrystalline portion of the coatings was also studied. It was revealed that upon heating, the amorphous phase prefers to crystallize into pre-existing crystalline phases in the as-deposited coating. Thus, the ultimate crystalline structure can be designed using the parameters that control the particle velocity during plasma spray coating. |
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| Publication date | 2010-06-01 |
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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 52374 |
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| NPARC number | 16891217 |
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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 | fd397904-1c36-4546-a4a3-89523df2542d |
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| Record created | 2011-02-20 |
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| Record modified | 2020-04-17 |
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