High toughness silicon nitride cutting tools

Details High toughness silicon nitride cutting tools High toughness silicon nitride cutting tools

1986-03-10

1987-03-24

Lechert, Jr., Stephen J.

Abrasive tool making process, material, or composition

With inorganic material

Clay, silica, or silicate

51309, 501 97, 501 98, 501121, 501122, 501152, 501154, B24D 302

Patent

active

046522760

ABSTRACT:
A silicon nitride cutting tool primarily for cutting cast iron comprises a granular phase consisting essentially of silicon nitride and an intergranular amorphous phase consisting essentially of magnesium oxide, yttrium oxide and silicon oxide wherein the components are present in specified amounts and ratios.

REFERENCES:
patent: 4365022 (1982-12-01), Tabata et al.
patent: 4401617 (1983-08-01), Ezis et al.
patent: 4424066 (1984-01-01), Sarin et al.
patent: 4426209 (1984-01-01), Sarin et al.
patent: 4434238 (1984-02-01), Ezis et al.
patent: 4557244 (1985-12-01), Allor

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