Accession Number : ADA303841

Title :   Development of Manufacturing Process for Large-Diameter Composite Monofilaments by Pyrolysis of Resin-Impregnated Carbon-Fiber Bundles.

Descriptive Note : Final rept.,

Corporate Author : LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CA PALO ALTO RESEARCH LAB

Personal Author(s) : Bradshaw, W. G. ; Pinoli, P. C. ; Vidoz, A. E.

PDF Url : ADA303841

Report Date : 01 OCT 1972

Pagination or Media Count : 112

Abstract : Large-diameter carbon-carbon-composite monofilaments were produced from the pyrolysis of organic precursor resins reinforced with high-strength carbon fibers. The mechanical properties were measured before and after pyrolysis and the results were correlated with the properties of the constituents. The composite resulting from the combination of Thornel 75 and GW-173 resin precursor produced the highest tensile strength. The importance of matching strain-to-failure of fibers and matrix to obtain all the potential reinforcement of fibers is discussed. Methods are described to reduce, within the carbonaceous matrix, pyrolysis flaws which tend to reduce the composite strength. Preliminary studies are described which demonstrated the feasibility of fiber-matrix copyrolysis to alleviate matrix cracking and provide an improved matrix-fiber interfacial bonding. jg p3

Descriptors :   *MANUFACTURING, *COMPOSITE MATERIALS, *CARBON FIBERS, *CARBON CARBON COMPOSITES, *PYROLYSIS, *BUNDLES, MECHANICAL PROPERTIES, TENSILE STRENGTH, POLYMERS, PRECURSORS, CRACKING(FRACTURING), MATRIX MATERIALS, STRAIN(MECHANICS), STRENGTH(MECHANICS), DEFECTS(MATERIALS), HIGH STRENGTH, ORGANIC MATERIALS, FILAMENTS, FAILURE(MECHANICS), MATCHING, CARBON REINFORCED COMPOSITES, IMPREGNATION.

Subject Categories : Laminates and Composite Materials
      Inorganic Chemistry
      Physical Chemistry
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE