Abrasion resistant silicon nitride based articles

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

1984-12-14

1987-03-17

Hayes, Lorenzo B.

Abrasive tool making process, material, or composition

With inorganic material

Metal or metal oxide

51308, C09C 168

Patent

active

046504982

ABSTRACT:
Composite articles and cutting tools are prepared by densification to form a body consisting essentially of particles of hard refractory boride uniformly distributed in a silicon nitride matrix consisting essentially of a first phase and a second phase. The first phase consists essentially of crystalline silicon nitride and the second phase is an intergranular refractory phase comprising silicon nitride and a suitable densification aid selected from the group consisting of yttrium oxide, cerium oxide, zirconium oxide, hafnium oxide and the lanthanide rare earth oxides and mixture thereof. The resulting composite article or cutting tool has a fracture toughness equal to or greater than about 4 MN/m.sup.3/2.

REFERENCES:
patent: 2913312 (1959-11-01), Dubeck
patent: 4022584 (1977-05-01), Rudy
patent: 4076506 (1978-02-01), Valdsaar
patent: 4381931 (1983-05-01), Hunold et al.
patent: 4433979 (1984-02-01), Sarin et al.
patent: 4441894 (1984-04-01), Sarin et al.
patent: 4449989 (1984-05-01), Sarin et al.

Affiliated with

Also associated with

Rating

Abrasion resistant silicon nitride based articles does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Abrasion resistant silicon nitride based articles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abrasion resistant silicon nitride based articles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1786653