四方氧化锆多晶体（TZP）陶瓷在诸多关键技术领域和极端应用环境有很好的应用前景。针对其在低温产生老化和高温下力学性能退化现象，造成材料的强度、韧性、硬度和可靠性难以满足使用要求，本项目以氧化铝增韧氧化锆陶瓷材料为研究对象，将碳化硅纳米颗粒和碳化硅晶须等作为增强相，拟采用振荡压力烧结新技术制备一种新型的高强度、高韧性、高硬度和高可靠性的氧化锆基复合材料。本项目系统地研究振荡压力烧结工艺条件与材料致密度、晶粒生长、缺陷结构及分布等微结构演变的相关性，揭示其对材料力学性能变化的影响规律；探明材料烧结动力学过程及晶粒生长可控的致密化机理，揭示材料的强韧化机理，从而建立振荡压力烧结材料组成-工艺条件-显微结构-力学性能之间的关系，既为制备高性能氧化锆基复合材料提供理论依据，也丰富了现代陶瓷材料的烧结理论。

Tetragonal zirconia polycrystalline (TZP) ceramics have great potential applications in the fields of key technology and under extreme application environment. However, their low temperature degradation usually happens during the service process, and their mechanical properties are also apparently decreased at high temperatures. In view of these problems, alumina toughened zirconia ceramics will be selected as the research objects in this project using SiC nanoparticles or/and whiskers as the reinforced phases; dynamic oscillatory pressure sintering (OPS) technique will be also used for the preparation of new types of zirconia matrix composites with high strength, high toughness, high hardness and high reliability in order to meet the above requirements. Moreover, the influence of various OPS parameters on the densification, grain growth, defect removal and mechanical properties of zirconia matrix composites will be systematically investigated to indicate their sintering kinetic processes and special densification as well as strengthening and toughening mechanisms. In the meanwhile, the relationship about material compositions, sintering parameters, microstructure and mechanical properties of zirconia matrix composites prepared by OPS technique will be also explored. All the research work mentioned above provides the important theoretical and practical significance for preparing zirconia matrix composites with high performances, and enriches the sintering theory of modern ceramics.