Abstract: The generating mechanism of grinding surface degenerating layer of the ceramics is studied. Sticky behavior and even process of the surface degenerating layer are discovered by SEM. The presence of micro-crystals in the degenerating layer is verified by the method of phase analysis and X-ray diffraction . The chemical composition of the layer is determined by energy spectrum. On the basis of the analysis of the glassiness structure, it is proved that the surface degenerating layers is made up of fragmental crystals or micro-crystals and glassiness compound. The caused of crystal fragmentation is explained.

Key words: Ceramic grinding, Generating mechanism, Surface degenerating layer