Manufacturing method for fiber reinforced silicon ceramics sinte

Details Manufacturing method for fiber reinforced silicon ceramics sinte Manufacturing method for fiber reinforced silicon ceramics sinte

1983-09-21

1988-06-28

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Including step of generating heat by friction

264 65, 501 88, 501 90, 501 95, C04B 3556, C04B 3558

Patent

active

047537647

ABSTRACT:
A method for manufacturing a fiber reinforced silicon carbide or silicon nitride ceramic sintered body having silicon carbide or silicon nitride ceramic whiskers dispersed therein, which method involves mixing together silicon carbide or silicon nitride ceramic powder, whisker formation agents made up of at least one material selected from metal Si or an inorganic compound containing Si, an organic containing Si, amorphous silicon ceramic powder or a mixture of SiO.sub.2 and carbon, or Si, sintering additives, and a whisker accelerating amount of a whisker formation accelerator selected from Fe, Ni, Co, Cr, V, Ti, Ta, W or Mo; molding the mixture into a predetermined shape; heat treating the molded body at a temperature of 1300.degree. C. to 1750.degree. C. to produce silicon carbide or silicon nitride whiskers in the molded body and thereafter densifying and sintering the molded body at sintering temperatures in a non-oxidizing atmosphere. The silicon carbide and silicon nitride ceramics produced by said method have excellent heat-resistance characteristics and excellent impact and corrosion resistance, thus making these ceramics eminently suitable for structural materials where these properties are required.

REFERENCES:
patent: 4097293 (1978-06-01), Komeya
Japanese Pat. Pub. 57-101000, 6/82.
Japanese Pat. Pub. 57-111300, 7/82.

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