Porosity and Water Absorbability of Tool Composite Materials as Factors of Improving Wear Resistance of Superabrasive Grinding Wheels. Part 3. Cutting-Tool Ceramic Composites

It is shown for the first time that the presence of porous space in cutting-tool ceramics makes it possible to influence, through water absorption, the performance of diamond machining of such ceramics and, first of all, improve their machinability. The effective duration of water pre-saturation of oxide-carbide ceramics has been found to be 48 h. For lower-porosity ceramic materials the saturation period is longer, e.g., it is 96 h for oxide ceramics and 192 h for cermets.