Method of making a silicon nitride part

Details Method of making a silicon nitride part Method of making a silicon nitride part

1977-03-25

1982-01-12

Parrish, John A.

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 65, 264 81, 264 86, 264325, C04B 3558

Patent

active

043104770

ABSTRACT:
A method of making a silicon nitride part is disclosed. In this method an article of silicon nitride is first made which has a density less than the theoretical density of silicon nitride. This article also contains a densification aid. The entire surface area of this article is coated with a thin silicon nitride skin which is gas impervious. The so coated article is heated to a temperature for a time sufficient so that some of the densification aid may diffuse into the silicon nitride skin. The so treated article is then subjected to a pressure sufficiently high, for a time sufficiently long and at a temperature which permits the silicon nitride article and skin thereon to be compacted to increase the density of the article to a density greater than it originally had and to form the silicon nitride skin about the article so that the skin becomes an integral of the finished part.

REFERENCES:
patent: 3419935 (1969-01-01), Pfeiler
patent: 3455682 (1969-07-01), Barbaras
patent: 3469976 (1969-09-01), Iler et al.
patent: 3819787 (1974-06-01), Coe
patent: 3854189 (1974-12-01), Ezis
patent: 3887411 (1975-07-01), Goodyear et al.
Airey, Pyrolytic Silicon Nitride Coatings, Proc. Brit. Cer. Soc., No. 22, Jun. 1973, pp. 305-320.
Gazza, Hot Pressed Si.sub.3 N.sub.4 , J. Am. Cer. Soc., vol. 56, No. 12, p. 662.

Affiliated with

Also associated with

Rating

Method of making a silicon nitride part does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making a silicon nitride part, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making a silicon nitride part will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1540705