High strength, high modulus pitch-based carbon fiber

Details High strength, high modulus pitch-based carbon fiber High strength, high modulus pitch-based carbon fiber

1989-03-23

1992-05-19

Kunemund, Robert

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

4234472, 4234474, 4234476, 264 292, D01F 912

Patent

active

051146975

ABSTRACT:
A high strength, high modulus pitch-based carbon fiber has a crystalline structure in which the presence of the (112) cross-lattice line and the resolution of the diffraction band into the (100) and (101) diffraction lines, which indicate the three-dimensional order of the crystallite of the fiber, are not recognized, and in which the orientation angle (.phi.) of X-ray structural parameter is not greater than 12.degree. and the stack height (Lc) ranges between 80 and 180 .ANG.. The carbon fiber also has a single-fiber diameter of 5 to 12 .mu.m, tensile strength not lower than 3.0 GPa, tensile elastic modulus not smaller than 500 GPa and elongation not smaller than 0.5%.

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