A new concept of composite phase ceramic had been proposed for the topcoat of a durable thermal barrier coating (TBC) system which is one of the critical technologies for advanced turbine engines. The composite phase TBCs showed promising performance related benefits over conventional single phase TBCs, including durability, material affordability, thermal stability and low thermal conductivity. The present work is to continue the effort to exploring the TBC behaviors of erosive wear by solid particle erosion test and thermal cyclic shock by special burner rig test. In the erosion test, the investigation was focused on the most important characteristics of erosion test results using different characterization methods, including the variations of erosion damages with impingement angle and finally the effect of high temperature sintering. In the burner rig test, the TBC was exposed to a rapidly thermal cycling condition introduced by a high heat flux and high-velocity combustion torch. The TBC damages and failure modes were identified and explained in terms of microstructural observation and mechanism discussion. The composite phase c + t′ TBC demonstrated improved erosion resistance relative to a Gd2Zr2O7 TBC and equivalent thermal shock resistance to a conventional 8YSZ TBC.

中文翻译：

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固体颗粒侵蚀和燃烧器试验中耐用复合相热障涂层的评估和表征


提出了复合相陶瓷的新概念，用于耐用热障涂层（TBC）系统的面漆，这是先进涡轮发动机的关键技术之一。与传统单相 TBC 相比，复合相 TBC 显示出有前景的性能相关优势，包括耐用性、材料承受能力、热稳定性和低导热率。目前的工作是继续努力通过固体颗粒侵蚀试验和特殊燃烧器试验来探索冲蚀磨损的TBC行为。在侵蚀试验中，研究重点是使用不同表征方法的侵蚀试验结果的最重要特征，包括侵蚀损伤随冲击角度的变化以及最后的高温烧结的影响。在燃烧器测试中，TBC 暴露于由高热通量和高速燃烧炬引入的快速热循环条件。通过微观结构观察和机制讨论来识别和解释 TBC 损伤和失效模式。复合相 c + t' TBC 表现出相对于 Gd2Zr2O7 TBC 更高的耐腐蚀性，以及与传统 8YSZ TBC 相当的抗热震性。