SACRIFICIAL FIBERS TO CREATE CHANNELS IN A COMPOSITE MATERIAL

摘要

A technique of heating a mixture of fibers that includes sacrificial fibers and carbon fiber precursor fibers to a temperature between about 170° C. and about 400° C., such that the sacrificial fibers are substantially removed and a plurality of channels remain in a preform precursor, and carbonizing the carbon fiber precursor fibers to form a porous carbon fiber preform. Also disclosed is a technique of heating a mixture of fibers that includes sacrificial fibers and carbon fibers to a temperature between about 170° C. and about 400° C., such that the sacrificial fibers are substantially removed and a plurality of channels remain, and infiltrating a densifying agent into at least the plurality of channels. Also disclosed is an article including a mixture of fibers that includes sacrificial fibers and carbon fiber precursor fibers or carbon fibers.

主权项

1. A method comprising:
heating a mixture of fibers comprising sacrificial fibers and a plurality of carbon fiber precursor fibers to a temperature between about 170° C. and about 400° C. to substantially remove the sacrificial fibers from the mixture of fibers and form a plurality of channels in a preform precursor between the plurality of carbon fiber precursor fibers in place of the sacrificial fibers; and carbonizing the plurality of carbon fiber precursor fibers to form a porous carbon fiber preform comprising the plurality of channels.