Silicon nitride based cutting tool insert

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

1994-05-25

1995-07-11

Group, Karl

Compositions: ceramic

Ceramic compositions

Refractory

501 98, 51307, C04B 35596

Patent

active

054321328

ABSTRACT:
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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patent: 4900700 (1990-02-01), Jun et al.
patent: 5093290 (1992-03-01), Furukawa et al.
patent: 5250477 (1993-10-01), Baldoni, II et al.

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