Plasma-sprayed nanostructured scandia-yttria and ceria-yttria codoped zirconia coatings: Microstructure,bonding strength and thermal insulation properties |
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| Authors: | MR Loghman-Estarki M Hajizadeh-Oghaz H Edris R Shoja Razavi A Ghasemi Z Valefi H Jamali |
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| Affiliation: | 1. Department of Materials Engineering, Malek Ashtar University of Technology, Shahinshahr, Isfahan, Iran;2. Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran;3. Faculty of Materials and Manufacturing Engineering, Malek Ashtar University of Technology, Tehran, Iran |
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| Abstract: | Microstructure, thermal insulation behavior and bonding strength of nanostructured 5%scandia, 0.5%yttria codoped zirconia (5.5 ScYSZ) and 25%ceria, 2.5%yttria co stabilized zirconia (27.5%CYSZ) coatings were investigated. ScYSZ and CYSZ nanostructured granules (as a top coat) and commercial NiCrAlY powder (as a bond coat) were thermal sprayed on an Inconel 738 substrate. The results revealed ScYSZ coating to have higher bonding strength. Nevertheless, due to higher porosity and the presence of local strains, the thermal insulation of nanostructured CYSZ coating was higher than for ScYSZ coating. |
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| Keywords: | CYSZ ScYSZ Thermal insulation capability |
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