Impermeability of YAlOceramic against molten glassy calcium-magnesium-alumina-silicate

被引：0

作者：

Zhaolu XUE

Yue MA

Shengkai GONG

Hongbo GUO

机构：

[1] School of Materials Science and Engineering, Beihang University

[2] Key Laboratory of High-Temperature Structure Materials and Coatings Technology (Ministry of Industry and Information Technology), Beihang University

来源：

Chinese Journal of Aeronautics | 2018年 / 12期

关键词：

Calcium-magnesium-alu mina-silicate(CMAS); Ceramics; Thermal barrier coating; Yttrium aluminum garnet; Zirconia;

D O I：

暂无

中图分类号：

V235.1 [燃气涡轮发动机]; V254.2 [无机非金属材料];

学科分类号：

082502 ; 0805 ; 080502 ;

摘要：

Degradation of thermal barrier coatings（TBCs） caused by calcium-magnesium-aluminasilica（CMAS） glassy penetration is becoming an urgent issue for TBCs industrial applications. In this work, yttrium aluminum garnet(Y3Al5O12, YAG) nano-powders were synthesized through a chemical co-precipitation route. The resistance of YAG ceramic to glassy CMAS infiltration at1250 °C was evaluated. YAG ceramic bulk sintered at 1700 °C for 10 h was comprised of a single garnet-type Y3Al5O12 phase. The molten CMAS glass was suppressed on the surface of the YAG ceramic at 1250 °C. A chemical reaction between YAG and the molten CMAS glass did not occur at 1250 °C for 24 h, suggesting that YAG could act as an impermeable material against glassy CMAS deposits in the TBC field.

引用

页码：2306 / 2311

页数：6

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