Method for preparing dense, pressureless sintered SiC whisker re

Details Method for preparing dense, pressureless sintered SiC whisker re Method for preparing dense, pressureless sintered SiC whisker re

1988-11-10

1990-08-07

Hearn, Brian E.

Compositions: ceramic

Ceramic compositions

Refractory

264 56, 264 63, C04B 3580

Patent

active

049468081

ABSTRACT:
Whisker reinforced composites having improved strength and toughness are prepared by a process including densification by essentially pressureless sintering. There is no need to hot press or hot isostatic press to achieve a density of 99+% of theoretical for 10 vol. % whiskers and 93+% for 20 vol. % whiskers. The composites are derived from the desired volume fraction of whiskers, a sintering aid preferably submicron in average size range, and a major portion of a pressureless sinterable matrix material having an average particle size of not more than about 0.5 micron. Yttria-alumina composites are sintered at less than about 1800.degree. C. and for less than about two hours to avoid surface degradation.

REFERENCES:
patent: 3962162 (1976-06-01), Schurack
patent: 4221697 (1980-09-01), Osborn et al.
patent: 4295890 (1981-10-01), Stroke
patent: 4388255 (1983-06-01), Simpson
patent: 4578233 (1986-03-01), Huseby et al.
patent: 4587068 (1986-05-01), Borase et al.
patent: 4636480 (1987-01-01), Hillig
patent: 4800180 (1989-01-01), McAllister et al.
patent: 4810442 (1989-03-01), Hillig et al.
patent: 4816182 (1989-03-01), Novick et al.
patent: 4829027 (1989-05-01), Cutler et al.
Milewski, J., "Efficient Use of Whiskers in the Reinforcement of Ceramics" Advanced Ceramic Materials, vol. 1, No. 1, 1986, pp. 36-41.

Affiliated with

Also associated with

Rating

Method for preparing dense, pressureless sintered SiC whisker re 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 for preparing dense, pressureless sintered SiC whisker re, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing dense, pressureless sintered SiC whisker re will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-960596