航空航天领域的许多构件是在高温和高转速等极端环境下进行长期的服役，受到复杂的热力耦合作用。而陶瓷及陶瓷基材料具有耐高温及抗氧化等优异的性能逐渐替代金属和合金，成为新一代高温材料的首选；但是陶瓷材料脆性较大，在冷热冲击下极易产生裂纹进而导致灾难性的破坏。

陶瓷材料的热震开裂行为是多场耦合的结果，断裂失效机理是十分复杂的，因此提高陶瓷材料热震损伤数值模拟的准确性和扩展应用范围具有重要的研究意义。本文通过水淬实验和相场理论下的数值模拟研究了陶瓷材料不同参数和不同构型下的热震损伤，分析了参数和构型改变对热震性能和裂纹扩展速度的影响。

实验上，确定了氧化锆和氧化铝陶瓷矩形板的临界热震温差并进行了380 ℃和480 ℃温差下的热震试验，对裂纹的长度和数目做了统计，其中包括了圆盘形氧化铝陶瓷的热震试验。

数值模拟上，基于相场理论建立了不同构型陶瓷材料的数值模型，利用ABAQUS进行模拟，重现了热震裂纹的扩展过程。通过临界热震温差、裂纹形貌、裂纹长度和裂纹数目的比对，验证了数值模拟的准确性并确定了本文中数值模型对于不同构型陶瓷材料的适用性。在上述基础上进行了不同材料参数（热导率、比热、密度、热膨胀系数、弹性模量和断裂韧性）的数值模拟，确定了材料参数对热震性能和裂纹扩展速度的影响，与经典的热震理论进行比较吻合较好；最后进行了双相材料热震损伤的数值模拟并对结果进行了分析。

本文完成了氧化铝和氧化锆陶瓷特定温差下的水淬实验，验证了相场理论适用于模拟出氧化铝之外其他陶瓷材料的热震损伤，并且证明了相场理论也适用于不同材料参数对热震裂纹扩展的影响，极大地扩展了相场理论的应用范围。

Many components in the aerospace industry are subjected to complex thermal coupling in extreme environments, such as high temperatures and high rotational speeds,for long-term service. Ceramics and ceramic-based materials with excellent properties such as high-temperature and oxidation resistance are gradually replacing metals and alloys as the new generation of high-temperature materials of choice; however, ceramic materials are brittle and susceptible to cracking, thus catastrophic damage under hot and cold shocks.

The thermal shock cracking behavior of ceramic materials is the result of multi-field coupling, and the fracture failure mechanism is very complex, so it is important to improve the accuracy of thermal shock damage numerical simulation of ceramic materials and extend the application scope. In this paper, the thermal shock damage of ceramic materials with different parameters and configurations is studied by water quenching experiments and numerical simulations under phase field theory, and the effects of parameter and configuration changes on the thermal shock performance and crack extension rate are analyzed.

Experimentally, the critical thermal shock temperature difference of rectangular plates of zirconia and alumina ceramics were determined,thermal shock tests were carried out at temperature differences of 380°C and 480°C, and the length and number of cracks were counted, including the thermal shock tests of disc-shaped alumina ceramics.

Numerical simulations were established for different configurations of ceramic materials based on the phase field theory, and ABAQUS was used to simulate and reproduce the propagation process of thermal shock cracks. The accuracy of the numerical simulation was verified by comparing the critical thermal shock temperature difference, crack shape, crack length and the number of cracks, and the applicability of the numerical model to different configurations of ceramic materials was determined. Based onthe above, numerical simulations of different material parameters(thermal conductivity, specific heat, density, coefficient of thermal expansion, modulus and fracture toughness) were carried out to determine the effects of material parameters on the thermal shock performance and crack expansion rate, which are in good agreement with the classical thermal shock theory; finally, numerical simulations of thermal shock damage of duplex materials were carried out, and the results were analyzed.

In this paper, water quenching experiments of alumina and zirconia ceramics at specific temperature differences are completed. It is verified that the phase field theory is applicable to simulate the thermal shock damage of ceramic materials other than alumina, and it is demonstrated that the phase field theory is also applicable to the effect of different material parameters on thermal shock crack extension, which greatly expands the application scope of the phase field theory.