Carbon Matrices
Carbon/carbon) composites applications:
- Similar to phenolic and are used when
- Very high temperature protection or toughness are needed.
- Rocket nozzles and nose cones.
- Brakes for aerospace, trucks, and race cars.
- Carbon matrix material with carbon fibers on opposing brake parts
- Produced from carbon fiber reinforced phenolics that have been charred in a process called pyrolysis.
- Charring process results in a porous structure because the phenolic ablates from solid to gas and does not go into a liquid phase.
- The porous material is impregnated with pitch, phenolics, or directly with carbon by vapor deposition.
- Resulting material is carefully charred again and the process is repeated to fill the remaining voids with material.
- Process can take as long as 6 months to prevent matrix damage
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