• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>ASME (American Society of Mechanical Engineers) Turbo Expo 2002: Ceramics Industrial and Cogeneration Structures and Dynamics >THERMAL GRADIENT CYCLIC BEHAVIOR OF A THERMAL/ENVIRONMENTAL BARRIER COATING SYSTEM ON SIC/SIC CERAMIC MATRIX COMPOSITES
【24h】

THERMAL GRADIENT CYCLIC BEHAVIOR OF A THERMAL/ENVIRONMENTAL BARRIER COATING SYSTEM ON SIC/SIC CERAMIC MATRIX COMPOSITES

机译：SIC / SIC陶瓷基复合材料上热/环境屏障涂层体系的热梯度循环行为

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

摘要

Thermal barrier and environmental barrier coatings (TBCs and EBCs) will play a crucial role in future advanced gas turbine engines because of their ability to significantly extend the temperature capability of the ceramic matrix composite (CMC) engine components in harsh combustion environments. In order to develop high performance, robust coating systems for effective thermal and environmental protections of the engine components, appropriate test approaches for evaluating the critical coating properties must be established. In this paper, a laser high-heat-flux, thermal gradient approach for testing the coatings will be described. Thermal cyclic behavior of plasma-sprayed coating systems, consisting of ZrO_2-8wt%Y_2O_3 thermal barrier and NASA Enabling Propulsion Materials (EPM) Program developed mullite+BSAS/Si type environmental barrier coatings on SiC/SiC ceramic matrix composites, was investigated under thermal gradients using the laser heat-flux rig in conjunction with the furnace thermal cyclic tests in water-vapor environments. The coating sintering and interface damage were assessed by monitoring the real-time thermal conductivity changes during the laser heat-flux tests and by examining the microstructural changes after the tests. The coating failure mechanisms are discussed based on the cyclic test results and are correlated to the sintering, creep, and thermal stress behavior under simulated engine temperature and heat flux conditions.
机译：热障和环境屏障涂层（TBC和EBC）在未来的先进燃气涡轮发动机中将发挥至关重要的作用，因为它们能够在恶劣的燃烧环境中显着扩展陶瓷基复合材料（CMC）发动机部件的温度性能。为了开发高性能，坚固的涂层系统以有效地保护发动机部件的热和环境保护，必须建立适当的测试方法来评估关键的涂层性能。在本文中，将描述用于测试涂层的激光高热通量，热梯度方法。在热作用下研究了由ZrO_2-8wt％Y_2O_3热障和NASA支持推进材料（EPM）程序开发的SiC / SiC陶瓷基复合材料上的mullite + BSAS / Si型环境屏障涂层组成的等离子喷涂系统的热循环行为。在水蒸气环境中，结合使用激光热通量仪和炉子热循环测试进行梯度分析。通过监测激光热通量测试期间的实时热导率变化并检查测试后的微观结构变化来评估涂层的烧结和界面损伤。在循环测试结果的基础上讨论了涂层破坏机理，并将其与在模拟发动机温度和热通量条件下的烧结，蠕变和热应力行为相关联。

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