标题： 稀土磷酸盐在熔融钙镁铝硅酸盐腐蚀下的断裂特性 显示英文标题

标题： Fracture Characteristics of Rare-earth Phosphate under Molten Calcium Magnesium Aluminosilicate Corrosion

摘要： 在熔融钙-镁铝硅酸盐(CMAS)腐蚀下，LuPO4稀土磷酸盐环境屏障涂层(EBC)材料的断裂特性被量化。EBC对于保护燃气轮机发动机热端的基于SiC的陶瓷基复合材料部件至关重要。最近的研究强调了稀土磷酸盐在CMAS腐蚀抵抗方面可能比第三代稀土硅酸盐更优的潜力。然而，在服务过程中CMAS腐蚀下EBC的断裂仍然是一个重要的问题。这项工作研究了使用介观尺度模拟和实验的LuPO4的断裂行为。该模型使用从制造的EBC样品中获取的显微图像进行介观尺度断裂模拟。模拟结果与实验断裂韧性数据进行比较，并通过统计检验(p<0.01)进行验证。模拟结果和实验观察表明，在类似的CMAS腐蚀条件下，LuPO4可能表现出比Lu2SiO5稀土硅酸盐更高的断裂抗性，为未来EBC的设计和开发提供了潜在的见解。 显示英文摘要

摘要： The fracture characteristics of LuPO4 rare-earth phosphate environmental barrier coating (EBC) material under molten calcium-magnesium aluminosilicate (CMAS) corrosion is quantified. EBCs are crucial for protecting SiC-based ceramic matrix composite components in the hot section of gas turbine engines. Recent research has highlighted the potential of rare-earth phosphates as better EBC materials than third-generation rare-earth silicates for CMAS corrosion resistance. However, the fracture of EBCs under CMAS corrosion during service remains a significant concern. This work investigates the fracture behavior of LuPO4 using mesoscale simulation and experiments. The model uses micrographs taken from fabricated EBC samples for mesoscale fracture simulations. The simulation results are compared with experimental fracture toughness data and validated using statistical tests (p<0.01). The simulation results and experimental observations demonstrate that LuPO4 may exhibit higher fracture resistance than Lu2SiO5 rare-earth silicate under similar CMAS corrosion conditions, offering potential insights for future EBC design and development.