Process for producing fiber-reinforced silicon carbide composites
First Claim
1. A process for producing a fiber-reinforced silicon carbide composite, said process comprising the steps of:
- laminating first fiber prepregs containing resin and second fiber prepregs containing silicon powder and resin, in alternate order;
molding the laminate into a desired shape to yield a green body;
carbonizing the green body at a temperature in the range of about 900°
C. to about 1350°
C. in an inert atmosphere to yield a carbonized composite;
subjecting the carbonized composite to reaction sintering at a temperature of about 1300°
C. or higher in vacuo or in an inert atmosphere to form open pores in a fiber region containing silicon powder; and
infiltrating molten silicon into the open pores of the sintered composite at a temperature in the range of about 1300°
C. to about 1800°
C. in vacuo or in an inert atmosphere.
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Accused Products
Abstract
A fiber-reinforced silicon carbide composite is produced by preparing a fiber prepreg containing a powdered silicon and a resin and molding the prepreg to yield a green body having a desired shape, or laminating a fiber prepreg containing a resin and a woven fabric prepreg containing a powdered silicon and a resin in alternate order and molding the laminate to yield a green body having a desired shape; carbonizing the green body at 900° to 1350° C. in an inert atmosphere; subjecting the carbonized body to reaction sintering at a temperature of 1300° C. or more in vacuo or in an inert atmosphere to form open pores; and infiltrating molten silicon into the sintered body having open pores at a temperature of about 1300° to 1800° C. in vacuo or an inert atmosphere.
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Citations
10 Claims
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1. A process for producing a fiber-reinforced silicon carbide composite, said process comprising the steps of:
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laminating first fiber prepregs containing resin and second fiber prepregs containing silicon powder and resin, in alternate order;
molding the laminate into a desired shape to yield a green body;
carbonizing the green body at a temperature in the range of about 900°
C. to about 1350°
C. in an inert atmosphere to yield a carbonized composite;
subjecting the carbonized composite to reaction sintering at a temperature of about 1300°
C. or higher in vacuo or in an inert atmosphere to form open pores in a fiber region containing silicon powder; and
infiltrating molten silicon into the open pores of the sintered composite at a temperature in the range of about 1300°
C. to about 1800°
C. in vacuo or in an inert atmosphere.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification