Recent Trends in Ceramic Technologies Related to Tool Ceramics

2 Recent Trends in Ceramic Technologies Related to Tool Ceramics 

4 Ceramics Based on Alumina Increasing the Hardness for Tool Applications 

45 vol-% Fig. 4 shows such a submicrometer sintered alumina microstructure. Further improvement is possible with small MgO additives (note that /nicrohardness measurements give artificially higher values related simply to the smaller size of the indents these microhardness data are, however, not representative for the technical 

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