Slurry composition and method of producing a ceramic matrix composite with reduced matrix defects
AssigneeRolls-Royce High Temperature Composites Inc.
InventorPathikumar Sellappan
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Abstract
A method of making a ceramic matrix composite includes infiltrating a fiber preform comprising silicon carbide fibers with a slurry comprising a liquid, silicon carbide particles, carbon particles, and silicon particles to form a slurry-infiltrated fiber preform. The slurry-infiltrated fiber preform is infiltrated with a molten material comprising silicon. Prior to or during the infiltration with the molten material, the silicon particles are melted. The molten material is cooled, and a ceramic matrix composite including a ceramic matrix reinforced with the silicon carbide fibers is formed, where the ceramic matrix is substantially devoid of dry slurry defects.
Claims18
A method of slurry infiltration, the method comprising:
- infiltrating a slurry into a fiber preform comprising silicon carbide fibers, wherein the slurry comprises:
- a liquid;
- silicon carbide particles;
- carbon particles;
- and
- silicon particles,
- wherein the silicon particles have a concentration in the slurry in a range from 0.5 vol. % to 2.5 vol. %, and wherein the silicon particles are uniformly dispersed throughout the fiber preform.
A method of making a ceramic matrix composite, the method comprising:
- infiltrating a fiber preform comprising silicon carbide fibers with a slurry comprising a liquid, silicon carbide particles, carbon particles, and silicon particles, thereby forming a slurry-infiltrated fiber preform, wherein the silicon particles are uniformly dispersed throughout the fiber preform;
- infiltrating the slurry-infiltrated fiber preform with a molten material comprising silicon;
- prior to or during the infiltration with the molten material, melting the silicon particles;
- and
- cooling the molten material, thereby forming a ceramic matrix composite including a ceramic matrix reinforced with the silicon carbide fibers,
- wherein the ceramic matrix is substantially devoid of dry slurry defects.
A method of slurry infiltration, the method comprising:
- infiltrating a slurry into a fiber preform comprising silicon carbide fibers, wherein the slurry comprises:
- a liquid;
- silicon carbide particles;
- carbon particles;
- and
- silicon particles,
- wherein the silicon particles are uniformly dispersed throughout the fiber preform.
Dependencies are inferred from the claim text.