关键词: 磨削 , 结构陶瓷 , 加工损伤

Abstract: A variety of damages, especially, damages in the defective areas of materials ,that are derived from the machining process appear as one of the important reasons，leading to faults in ceramic parts in their application. By grinding test and SEM analysis on the ground surface of structural ceramics Al2O3，Si3N4, and Mg-ZrO2 et al，damaging ,actions in the grinding process upon defective of areas ceramics such as pore, looseness, crystal boundary and interstice are investigated. It is shown that there is little effect by grinding on the microstructure of fine pores inside crystals ,and that grinding damages in large pores, whether rounded or irregular，are negligible. However, remarkable subsidence and micro-cracks are produced in areas of looseness and crystal boundaries during" grinding? which are detrimental to the mechanical properties of ceramic materials.

Key words: grinding , structural ceramic , machining damage