Claims
- 1. A high strength, ultra high modulus carbon fiber characterized by the presence of the (112) cross lattice line and the resolution of the defraction band into two distinct lines (100) and (101), which indicate the three dimensional order of the crystallite of the fiber; an interlayer spacing (d.sub.002) of 3.371 to 3.40 .ANG.; a stack height (Lc.sub.002) of 170 to 350 .ANG.; and a layer size (La.sub.110 of 200 to 450 .ANG., wherein said carbon fiber as a tensile strength of 3.0 GPa or more and a modulus of elasticity of 600 GPa or more.
- 2. A carbon fiber according to claim 1, having a orientation angle (.phi.) of 3.degree. to 12.degree..
- 3. A carbon fiber according to any of claims 1 or 3, wherein the R value obtained by Raman spectroscopy is 0.05 to 0.30 and the peak position of the higher kayser band is 1585 cm.sup.-1 or less.
Priority Claims (1)
Number |
Date |
Country |
Kind |
62-135822 |
May 1987 |
JPX |
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Parent Case Info
this is a continuation of copending application Ser. No. 198,959 filed on May 26, 1988 now abandoned.
US Referenced Citations (7)
Continuations (1)
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Number |
Date |
Country |
Parent |
198959 |
May 1988 |
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