Nanocomposite dense sintered silicon carbonitride ceramic cutting tool

摘要

The present invention discloses a nanocomposite dense sintered silicon carbonitride ceramic cutting tool, obtainable by cold pressing a spray-dried flowable granulate of a nanosized powder of alpha -Si3N4 and SiC, containing an amount lower than 30% of nanosized SiC particles, in the presence of sintering aids and further additives, by sintering the so obtained pressed product at a temperature of from 1800 DEG C to 1900 DEG C, for a time of from 0.5 to 2 hours and with an over-pressure of inert gas and by machining the cutting tool.