Sintered Alumina Grits Produced by Powder Processing Approaches

3 Sintered Alumina Grits Produced by Powder Processing Approaches 

With a fracture toughness of 3.3-4MPa m for all sintered corundum microstructures independent sol/gel or powder processing, the additional data included in Fig. 11 

Submicrometer Cutting Ceramics for Tools with Defined Cutting Edge 

Characteristic for the late nineties was the increasing use of tough grades of silicon nitride, first of all when high feed rates are requested. With their rather low hardness, however, Si3N4 ceramics are outside the scope of the present discussion. 

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