Al2O3/YAG/ZrO2共晶陶瓷抗氧化性好、力学性能优异，是理想的高温结构材料。目前凝固技术还难以制备大尺寸和复杂形状的共晶陶瓷，而传统烧结方法制备的共晶陶瓷力学性能差。本项目利用闪烧工艺的低温极速传质特点，首次成功制备了高性能Al2O3/YAG/ZrO2共晶陶瓷。然而，目前对闪烧制备Al2O3/YAG/ZrO2共晶陶瓷的机理还缺乏研究。本项目将系统研究闪烧制备Al2O3/YAG/ZrO2共晶陶瓷工艺，解决共晶陶瓷闪烧时的电导突变与极速传质机理等关键科学问题，揭示电热耦合作用对致密化过程和显微结构的影响规律，为闪烧制备Al2O3/YAG/ZrO2共晶陶瓷技术的应用奠定基础。本项目发展了闪烧制备Al2O3/YAG/ZrO2共晶陶瓷的新方法，在陶瓷工艺和烧结理论方面具有创新性。本项目的研究成果将突破对陶瓷闪烧机理的认识，对共晶陶瓷的发展和陶瓷烧结技术的进步具有重要意义。

Al2O3/YAG/ZrO2 eutectic ceramic has superior oxidation resistance, flexural strength, thermal stability and creep resistance at high temperature and is a candidate for high-temperature structural materials. Solidification methods of eutectic ceramic are not adequate to produce large or near-net shape material, and the mechanical properties of eutectic ceramic consolidated by traditional sintering methods are highly degraded. Recently, flash sintering, in which Al2O3/YAG/ZrO2 eutectic ceramic can be sintered in very short time at relatively low temperatures with the assist of applied electric field, has been developed. However, the underlying mechanism of flash sintering is mystifying. The aim of this project is to investigate the processing of flash sintering Al2O3/YAG/ZrO2 eutectic ceramic. A unified mechanism will be proposed to explain the field-assisted phenomena, such as power surge and enhanced sintering kinetics. The coupling effect of electric field and thermal field on densification and microstructures also will be verified. Here, we have developed a new method to consolidate Al2O3/YAG/ZrO2 eutectic ceramic. If indeed flash sintering is instigated, it will be a new step in ceramic research.