Sacrificial materials to improve chemical vapor infiltration of B4C loaded preforms
AssigneeGoodrich Corporation
InventorsJohn S. Linck, Thomas Perea
Life of this patent
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Abstract
A method of forming a composite component is provided. The method includes locating a fibrous preform, providing a slurry, mixing the slurry with sacrificial fibers, injecting the slurry into the fibrous preform, heating the fibrous preform, forming channels in the fibrous preform, and densifying the fibrous preform. The sacrificial fibers are suspended in the fibrous preform along an injection pathway such that heating the sacrificial fibers forms the channels along the injection pathway as the sacrificial fibers are burned away.
Claims18
A method of forming a composite component, comprising:
- mixing a slurry with sacrificial fibers, wherein the slurry is a ceramic particulate including an aqueous B4C based slurry, and wherein the sacrificial fibers contain at least one micro polyester particle;
- injecting the mixed slurry into a fibrous preform, wherein the sacrificial fibers are suspended in the fibrous preform along an injection pathway, wherein the injection pathway is oriented substantially parallel to the Z-axis, and wherein injecting comprises penetrating the fibrous preform;
- heating the fibrous preform to form channels in the fibrous preform by burning away the sacrificial fibers suspended in the injection pathway;
- and
- densifying the fibrous preform.
A method of forming a brake disk, comprising:
- mixing a slurry with sacrificial fibers, wherein the slurry is a ceramic particulate including an aqueous B4C based slurry, and wherein the sacrificial fibers contain at least one micro polyester particle;
- injecting the mixed slurry into a fibrous preform wherein the sacrificial fibers are suspended in the fibrous preform along an injection pathway, wherein the injection pathway is oriented substantially parallel to the Z-axis, and wherein injecting comprises penetrating the fibrous preform;
- and
- densifying the fibrous preform, wherein the sacrificial fibers are burned to form channels.
Dependencies are inferred from the claim text.