Abstract
Using Gd2O3, Sm2O3, Yb2O3 and ZrOCl2·8H2O as raw materials, a novel multicomponent rare earth zirconate (Gd0.4Sm0.5Yb0.1)2 Zr2O7 ceramic powder was synthesized by coprecipitation process. The powder was pressed into the compacts which were sintered into the ceramic bulks at 1600°C for 10 h. The phase composition and the microstructures of the powder and bulks were identified by XRD and SEM. The thermal conductivities of the bulks were measured by laser pulse method. The results show that the prepared powder has pyrochlore structure, and fine particle size. The thermal conductivity of the novel ceramic is lower than that of Sm2Zr2O7. These results indicate that (Gd0.4Sm0.5Yb0.1)2 Zr2O7 can be used explored as the candidate material for the thermal barrier coatings in TBCs system.
Original language | English |
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Pages (from-to) | 537-540 |
Number of pages | 4 |
Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
Volume | 36 |
Issue number | SUPPL. 2 |
Publication status | Published - Aug 2007 |
Keywords
- Complex rare-earth zirconate
- Coprecipitation
- Microstructure
- Thermal conductivity