Nanocomposite dense sintered alumina based ceramic cutting tool

摘要

The present invention concerns a nanocomposite dense sintered alumina and/or alumina/zirconia ceramic cutting tool, obtainable by cold pressing a spray-dried suspension of a nanosized powder of alumina and/or alumina/zirconia, containing of from 1 to 35% by weight of a hard particle phase, in presence of additives, by sintering the so obtained pressed product at a maximum temperature of 1600°C, for a time of from 30 to 90 minutes in an inert atmosphere under raised gas pressure, and by machining the so obtained densified material into standard indexable insert cutting tool.