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US 6,555,031 B2Granted
Process for producing silicon carbide bodies
AssigneeCorning Incorporated
InventorsKishor P. Gadkaree, Joseph F. Mach, John L. Stempin
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Abstract
A silicon carbide honeycomb body is made by shaping a plasticizable raw material batch mixture containing powdered silicon metal, a water soluble crosslinking thermoset resin, a powdered silicon-containing filler, a water soluble thermoplastic binder, and water into a green honeycomb body, and thereafter drying, curing and sintering the green body at a temperature sufficient to convert the green body to a porous silicon carbide sintered body.
Claims19
A process for forming a porous silicon carbide sintered body comprising:
- (a) selecting raw materials to form a plasticizable raw material batch mixture comprising:
- (i) about 10-40%, by weight, powdered silicon metal,
- (ii) about 10-40%, by weight, of a water-soluble crosslinking thermoset resin having a viscosity of less than about 1000 centipoise (cp),
- (iii) up to 60%, by weight, of a powdered silicon-containing filler,
- (iv) about 1-10%, by weight of a water soluble thermoplastic temporary binder;
- and
- (v) a superaddition of 5-25%, by weight, of water;
- (b) shaping the batch mixture to from a green body;
- (c) drying the green body;
- (d) heating the green body in an inert gas, vacuum, or nitrogen atmosphere at a temperature sufficient to carbonize the resin;
- and,
- (e) sintering the green body at a temperature sufficient to convert the green body to a porous silicon carbide sintered body.
9 more elements
Dependencies are inferred from the claim text.