Graphitic fibers having superior composite properties and method

Details Graphitic fibers having superior composite properties and method Graphitic fibers having superior composite properties and method

1974-06-06

1976-08-24

Meros, Edward J.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

106307, 264 292, C01B 3107

Patent

active

039767469

ABSTRACT:
At least partially carbonized fibers formed by pyrolysis from precursor fibers are converted to graphitic fibers in successive heating and stretching zones in which a transitional phase of high fiber reactivity is utilized. Chemical agents applied to the fibers during this transition increase matrix-fiber adhesion properties by reacting with the fibers before they develop excessive levels of crystallographic order and become inert at graphitization temperature levels. Improved control of fiber properties is achieved by employment of short residence times and resistive heating with concurrent stretching in the zones, and by imparting high stretch levels at relatively low temperatures to the fibers. The resultant fibers have superior properties for component structures and at the same time have excellent tenacity and modulus values as well.

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patent: 3853610 (1974-12-01), Byrne et al.
patent: 3894884 (1975-07-01), Druin et al.

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