Abrasion resistant silicon nitride based articles

Details Abrasion resistant silicon nitride based articles Abrasion resistant silicon nitride based articles

1982-03-01

1984-02-28

Czaja, Donald E.

Abrasive tool making process, material, or composition

With inorganic material

51309, C04B 3116

Patent

active

044339798

ABSTRACT:
A composite article and cutting tool are prepared by densification to form a body consisting essentially of particles of hard refractory material uniformly distributed in a matrix consisting essentially of a first phase and a second phase, said first phase consisting essentially of crystalline silicon nitride and said second phase being an intergranular refractory phase comprising silicon nitride and a suitable densification aid selected from the group consisting of yttrium oxide, zirconium oxide, hafnium oxide and the lanthanade rare earth oxides and mixture thereof.

REFERENCES:
patent: 4179301 (1979-12-01), Buljan
patent: 4320203 (1982-03-01), Brandt et al.
patent: 4323325 (1982-04-01), Samanta et al.
Gnesin et al., "Optimization of the Properties of a Tool Material Based on Silicon Nitride", Soviet Powder Metallurgy and Metal Ceramics, No. 17, 1978, pp. 124-127.

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