Alumina-zirconia-silicon carbide-magnesia cutting tools

Details Alumina-zirconia-silicon carbide-magnesia cutting tools Alumina-zirconia-silicon carbide-magnesia cutting tools

1988-11-03

1990-09-25

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Carbide or oxycarbide containing

51309, C04B 3556

Patent

active

049593315

ABSTRACT:
A metalcutting insert is provided with an alumina based ceramic composition composed of (in volume percent, v/o): about 1.5 to 17.5 silicon carbide whiskers; about 5 to 17.5 zirconia; residue of a magnesium oxide addition added in an amount effective to enhance the metalcutting lifetime of the cutting edge of the insert; and an alumina based matrix in which the silicon carbide whiskers, zirconia and residue of magnesium oxide are substantially homogeneously distributed. At least 4 v/o of the alumina based ceramic composition is tetragonal zirconia.

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