Abstract
Advances in ceramic processing technology have resulted in a new generation of high performance ceramic cutting tools exhibiting improved properties. In the present work, an alumina-yttria composite ceramic cutting tool insert is developed and machining studies are conducted to evaluate its machining performance on grey cast iron work pieces. For comparison the machining studies are also conducted using a pure alumina insert and a commercially available Ti[C,N] mixed alumina insert. The hardness and fracture toughness of the alumina-yttria insert is higher than for pure alumina insert. The alumina-yttria insert shows better performance than pure alumina insert and its performance is comparable to that of the Ti[C,N] mixed alumina insert.
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