...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of the European Ceramic Society >Microstructure and thermo-physical properties of yttria stabilized zirconia coatings with CMAS deposits
【24h】

Microstructure and thermo-physical properties of yttria stabilized zirconia coatings with CMAS deposits

机译：含CMAS沉积物的钇稳定氧化锆涂层的微观结构和热物理性质

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Yttria stabilized zirconia (YSZ) thermal barrier coatings (TBCs) are used to protect hot-components in aero-engines from hot gases. In this paper, the microstructure and thermo-physical and mechanical properties of plasma sprayed YSZ coatings under the condition of calcium-magnesium-alumina-silicate (CMAS) deposits were investigated. Si and Ca in the CMAS rapidly penetrated the coating at 1250 °C and accelerated sintering of the coating. At the interface between the CMAS and YSZ coating, the YSZ coating was partially dissolved in the CMAS, inducing the phase transformation from tetragonal phase to monoclinic phase. Also, the porosity of the coating was reduced from ~25% to 5%. As a result, the thermal diffusivity at 1200 °C increased from 0.3 mm~2/s to 0.7 mm~2/s, suggesting a significant degradation in the thermal barrier effect. Also, the coating showed a ~40% increase in the microhardness. The degradation mechanism of TBC induced by CMAS was discussed.
机译：氧化钇稳定的氧化锆（YSZ）热障涂层（TBC）用于保护航空发动机中的热组件免受热气体的侵害。本文研究了在钙镁铝硅酸盐（CMAS）沉积条件下等离子喷涂YSZ涂层的微观结构，热物理和机械性能。 CMAS中的Si和Ca在1250°C时迅速渗透涂层，并加速了涂层的烧结。在CMAS和YSZ涂层之间的界面处，YSZ涂层部分溶解在CMAS中，引起从四方相到单斜相的相变。而且，涂层的孔隙率从〜25％降低到5％。结果，在1200℃下的热扩散率从0.3mm 2 / s增加到0.7mm 2 2 / s，表明热障效果显着降低。同样，涂层的显微硬度也增加了约40％。探讨了CMAS诱导TBC降解的机理。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号