Silicon nitride based cutting tool insert

Details Silicon nitride based cutting tool insert Silicon nitride based cutting tool insert

C - Chemistry, Metallurgy

04

B

C04B 35/596 (2006.01) B23C 5/20 (2006.01) C04B 35/593 (2006.01)

Patent

CA 2150037

A silicon nitride based composition for manufacturing sintered ceramic articles, in particular cutting tool inserts, having improved density, hardness and fracture toughness characteristics is described. The amounts of yttrium oxide, aluminum nitride and titanium nitride contained in the silicon nitride based mixture are interrelated by a formula to attain substantially improved abrasion resistance.

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