Abstract
Influence of machining process on damage was examined with industrial alumina ceramics with several microstructures. Alumina ceramics were prepared by dry-pressing method with spray-drying granules. Changing sintering conditions developed several microstructures. The damage for machining process was changed by crystalline size and internal pore of alumina ceramics. After formed and sintered, characteristics of alumina ceramics were evaluated for grain size, internal pore size and porosity using several methods. The strength of ground ceramics was measured by a four point bending test. The damage in ground ceramics was studied by SEM and Laser scanning microscope.
