ALUMINUM - GRAPHITE COMPOSITES.
Rept. Jul 69-Feb 70,
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
Pagination or Media Count:
Room temperature uniaxial tensile tests have shown that composites of eutectic aluminum - silicon alloy and Thornel 50 graphite fibers have strengths greater than a theoretical value that was calculated on the basis of the law of mixtures. At 28 vol fibers, the average uniaxial tensile strength was found to be 106,000 psi, and several values between 130,000 and 144,000 psi were obtained. The modes of fracture in the composites have been studied by the microexamination of polished surfaces and fractures of tested specimens. Specimens of the composite have been thermally cycled between -193C and 20C and -193C and 500C 20 times. Tensile tests and microexamination of the thermally cycled specimens show that thermal cycling does not degrade the tensile properties of the composites or change their microstructure. Author
- Laminates and Composite Materials