Temperature dependence of the thermal conductivity of carbon-carbon composites

High temperature thermal conductivity data of several commercial and developmental 1-D, 2-D, 3-D and 4-D composites are discussed in terms of temperature dependence and composite structure. The samples chosen for this study include a Pseudo-monocrystal graphite and a 2-D composite manufactured by Le Carbone-Lorraine, 1-D and 2-D composites from Mitsubishi Kasei America, Inc., and a 3-D and 4-D composite manufactured by Fiber Materials Incorporated. The Mitsubishi specimens where measured as processed, heat treated by the manufacturer at some undisclosed high temperature and heat treated by ORNL at 3000{degrees}C. All specimens were machined into 12.5 mm disks with thicknesses in the range 0.4 to 0.8 cm. 4 refs., 1 fig.