Engineering ceramic materials are difficult to machine because of their outstanding properties, such as high hardness, high wear resistance, high erosion resistance and high brittleness. The existing machining technologies of ceramic have many disadvantages,such as high cost,low efficiency and poor quality. Improving machinabili-ty of engineering ceramic materials via microstructural design is the key to resolving the problem of difficult machining of ceramic materials. In this paper,the present state of re...