Process for producing silicon nitride ceramic articles

Details Process for producing silicon nitride ceramic articles Process for producing silicon nitride ceramic articles

1987-12-29

1989-05-30

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 66, 264 67, C04B 3332

Patent

active

048349267

ABSTRACT:
A process for producing silicon nitride ceramic articles is disclosed, which includes the steps of preparing a mixed powder of silicon nitride and a sintering aid, shaping the mixed powder, sintering the shaped body, machining the sintered body in a desired shape, and then heating the machined sintered body in a temperature range from 550.degree. C. to 900.degree. C. in an oxidizing atmosphere. Alternatively, after the sintering, the sintered body is heated in a temperature range from 950.degree. C. to 1,400.degree. C. to crystallize an Si.sub.3 N.sub.4 grain boundary phase, the crystallized sintered body is machined into a desired shape, and the machined body is heated in a temperature range from 550.degree. C. to 900.degree. C. in an oxidizing atmosphere. Thereby, silicon nitride ceramic articles having high strength at room temperature can be obtained.

REFERENCES:
patent: 4702869 (1987-10-01), Higuchi et al.

Affiliated with

Also associated with

Rating

Process for producing silicon nitride ceramic 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 Process for producing silicon nitride ceramic articles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing silicon nitride ceramic articles will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2150790