A Prototype Apparatus for Determining Changes in the Electrical Conductivity of Production Run Carbon Fibers

  • Laura L. Dulcie

Abstract

During the production and processing of continuous lengths of carbon fibers (a tow), the conductivity along the length of the tow may vary significantly depending on the variation of the heat treatment temperature (HTT) and the resident furnace time. For PAN-type (polyacrylonitrile) fibers at HTT greater than 1000°C, a small change in HTT results in a large change in conductivity 03C3. For lower values of HTT, the corresponding change in σ can be quite small [1].

Keywords

Permeability Furnace Microwave Attenuation Ferrite 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. B. Donnet and R. C. Bansal, Carbon Fibers (Marcel Dekker, NY, 1984).Google Scholar
  2. 2.
    P. McIntire, Editor, Nondestructive Testing Handbook. Second Edition. Volume Four Electromagnetic Testing (ASTM, 1986).Google Scholar
  3. 3.
    V. B. Welsby, The Theory and Design of Inductance Coils (John Wiley and Sons, NY, 1960).Google Scholar
  4. 4.
    A. J. Zaman, S. A. Long, and C. G. Gardner, “Impedance of a Loop Surrounding a Conducting Cylinder,” IEEE Transactions on Instrumentation and Measurements. IM-30, March 1981, pp. 41–45.Google Scholar
  5. 5.
    L. L. Dulcie, C. A. Thompson, and F. R. Fickett, “Electrical Resistivity and Surface Coating Integrity of Carbon and Composite Fibers,” Proceedings of the Smoke/Obscurants Symposium XVI. 1992.Google Scholar
  6. 6.
    L. L. Dulcie and F. R. Fickett, “Resistive Fiber Test Project,” Report to Sponsor 1992, ERDEC, APG, MD 21010.Google Scholar

Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • Laura L. Dulcie
    • 1
  1. 1.Electromagnetic Technology DivisionNational Institute of Standards and TechnologyBoulderUSA

Personalised recommendations