Influence of ternary co-doping on thermo-physical properties of YSZ thermal barrier coatings
NiO，Er<sub>2</sub>O<sub>3</sub>，Yb<sub>2</sub>O<sub>3</sub>，Y<sub>2</sub>O<sub>3</sub> and ZrO<sub>2</sub> powders were used as raw materials to prepare composite ceramic materials by the method of high temperature s...
| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
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Journal of Aeronautical Materials
2019-02-01
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| Series: | Journal of Aeronautical Materials |
| Subjects: | |
| Online Access: | http://jam.biam.ac.cn/CN/Y2019/V39/I2/49 |
| Summary: | NiO，Er<sub>2</sub>O<sub>3</sub>，Yb<sub>2</sub>O<sub>3</sub>，Y<sub>2</sub>O<sub>3</sub> and ZrO<sub>2</sub> powders were used as raw materials to prepare composite ceramic materials by the method of high temperature solid phase synthesis. The specific heat, thermal diffusion coefficient, thermal conductivity and other thermal physical properties of the composite ceramic materials were studied and compared with the traditional 8YSZ thermal barrier coating materials. The crystal structure and phase composition were tested by XRD. The results show that after NiO，Er<sub>2</sub>O<sub>3</sub>，Yb<sub>2</sub>O<sub>3</sub>，Y<sub>2</sub>O<sub>3</sub> and ZrO<sub>2</sub> co-doping, the thermal diffusion coefficient is 0.36-0.56 mm<sup>2</sup>/s, which is 20<private-char description="%">%</private-char> lower than that of YSZ from room temperature to 1500 ℃，the thermal conductivities is 1.45-1.55 W/(m?K), which is 18<private-char description="%">%</private-char> lower than that of YSZ from room temperature to 1500 ℃，2EYNYSZ material has single phase structure, and 1500 ℃ heat-treatment does not occur phase transition within 100 h. |
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| ISSN: | 1005-5053 1005-5053 |