仿生层状ZrB_2-SiC超高温陶瓷研究进展

Research Process in Biomimetic Laminated ZrB_2-SiC Ultra-high Temperature Ceramics

仿生层状ZrB2-SiC超高温陶瓷具有独特的层状结构,使得陶瓷的断裂方式由脆性断裂变为二次断裂或多次断裂,表现为准塑性,极大的提高了陶瓷的断裂韧性。综述了层状ZrB2-SiC超高温陶瓷的韧化机理和结构设计,介绍了常见的制备方法以及性能研究,并分析了今后发展需要关注的问题。

The fracture toughness of biomimetic laminated ZrB2-SiC ultra-high temperature ceramics can be improved greatly due to its unique layered structure. This structure makes the material quasi-plastic by changing its fracture behavior from brittle to secondary and even multiple-stepped cleavage, remarkably different from the catastrophic fracture of monolithic ZrB2 ceramics. This paper introduces the design principle, preparing technique and current status of the biomimetic ZrB2-SiC ultra-high temperature ceramics. It also points out the developing direction of this material in future.