Stoichiometrically balanced silicon nitride ceramic for high...

Details Stoichiometrically balanced silicon nitride ceramic for high... Stoichiometrically balanced silicon nitride ceramic for high...

2007-01-02

2007-01-02

Group, Karl (Department: 1755)

Compositions: ceramic

Ceramic compositions

Refractory

C501S097200

Reexamination Certificate

active

10893479

ABSTRACT:
A silicon nitride based ceramic, that is highly effective for use as a cutting tool for the high speed machining of cast irons, that is essentially a homogeneous mixture consisting of both crystalline and whisker forms of beta silicon nitride that are interstitially bonded by a stoichiometrically balanced glass mixture of magnesia, silica, yttria and zirconia, where the ratios of each have been controlled to increase the eutectic point and refractoriness of the mixed glass.

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patent: 5312785 (1994-05-01), Pyzik et al.
patent: 5585314 (1996-12-01), Ezis et al.
patent: 5723392 (1998-03-01), Ezis et al.

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