Method for producing SiC fiber-reinforced SiC composite...

Details Method for producing SiC fiber-reinforced SiC composite... Method for producing SiC fiber-reinforced SiC composite...

2001-10-25

2008-07-29

Lopez, Carlos (Department: 1791)

Plastic and nonmetallic article shaping or treating: processes

Outside of mold sintering or vitrifying of shaped inorganic...

Producing fiber containing article or fiber

C264S642000, C264S682000

Reexamination Certificate

active

07404922

ABSTRACT:
A powdery mixture of fine SiC powder with one or more oxide sintering additives of Al2O3, Y2O3, SiO2and CaO is blended and uniformly dispersed in a polymeric SiC precursor to prepare a matrix-forming polymeric slurry. A preform of SiC fiber, which has quasi-stoichiometric composition with high crystallinity, is impregnated with the polymeric slurry and then hot-pressed at a temperature of 1600° C. or higher in presence of a liquid phase. Since the heat-resistant SiC fiber is used as strengthening fiber, the prepreg is sintered to a dense SiC composite excellent in mechanical properties by one-step hot-pressing.

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