Method of preparing fiber reinforced ceramic material

Details Method of preparing fiber reinforced ceramic material Method of preparing fiber reinforced ceramic material

1986-07-16

1987-08-25

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 63, 264332, 428367, C04B 3580

Patent

active

046891889

ABSTRACT:
Alternate layers of mats of specially coated SiC fibers and silicon monotapes are hot pressed in two stages: In the first a die is heated to about 600.degree. C. in a vacuum furnace and maintained at this temperature for about one-half hour to remove fugitive binder.
In the second stage the die temperature is raised to about 1000.degree. C. and the layers are pressed at between 35 MPa and 138 MPa. The resulting preform is placed in a rector tube where a nitriding gas is flowed past the preform at 1100.degree. C. to 1400.degree. C. to nitride the same.

REFERENCES:
patent: 3819786 (1974-06-01), May
patent: 3926656 (1974-10-01), Mangels
patent: 4004937 (1975-11-01), Masaki
patent: 4158687 (1979-06-01), Yajima et al.
patent: 4285895 (1981-08-01), Mangels et al.
patent: 4465650 (1984-08-01), Ohno

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