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These are ceramic and cermet cutting tools. Alumina ceramic is sintered from high pure alumina oxide which is cold pressed, hot pressed or hot isostatic pressed (H.I.P.). Silicon nitride ceramic consists of silicon nitride and special nitride. TiC ceramic contains mostly titanium carbide. Cermet is composed mainly of TiC + TiN cermet and titanium nitride. Tough TiN cermet made from special alloy is also available. There are multicoated carbide inserts with alumina nitride and alumina.
