초록

A pierced fabric carbon-carbon structure is selectively loaded with a particulate material to provide resistance to erosion.

대표청구항 ▼

In a process for fabricating a reentry carbon-carbon nosetip structure comprising the steps of: (a) stacking a plurality of layers of X-Y woven fabric; (b) piercing said stack of layers of woven fabric in the Z direction with a plurality of rigidized carbon rods to form a preform; (c) impregnating s

In a process for fabricating a reentry carbon-carbon nosetip structure comprising the steps of: (a) stacking a plurality of layers of X-Y woven fabric; (b) piercing said stack of layers of woven fabric in the Z direction with a plurality of rigidized carbon rods to form a preform; (c) impregnating said preform with a material convertable to carbon by heat treatment; (d) carbonizing the impregnated preform; (e) graphitizing the carbonized preform; (f) repeating steps (c) through (e) to achieve a desired bulk density; and (g) machining the resulting densified composite structure to a desired configuration; the improvement comprising selectively loading the said layers of woven fabric with a heat-resisting particulate material to provide a desired ablative performance in said nosetip structure. A mutually orthogonal three-directional reinforcement structure for a composite material which comprises a plurality of layers of X-Y woven fabric pierced by a plurality of rigid carbon rods in the Z direction, wherein at least a portion of the said fabric layers is loaded with a heat-resisting particulate material.