Several rod-shaped specimens with uniaxially packed fibers (Hi-Nicalon, Hi-Nicalon Type S, Tyranno SA and Amoco K1100 types) and a pre-ceramic polymer matrix have been fabricated. By using appropriate analytic models, the bare fiber thermal conductivity (Kf) and the interface thermal conductance (h) will be determined as a function of temperature up to 1000?C before and after irradiation for samples cut from these rods. Initial results are: (1) for unirradiated Hi-Nicalon SiC fiber, Kf varied from 4.3 up to 5.9 W/mK for the 27-1000?C range, (2) for unirradiated K1100 graphite fiber, Kf varied from 576 down to 242 W/mK for the 27-1000?C range, and (3) h = 43 W/cm2K at 27?C as a typical fiber/matrix interface conductance.
Revised: July 27, 2010 |
Published: September 1, 2000
Citation
Youngblood G.E., D.J. Senor, W. Kowbel, J. Webb, and A. Kohyama. 2000.THERMAL CONDUCTIVITY OF SIC AND C FIBERS. In Fusion Materials: Semi-Annual Progress Report Ending December 31, 1999, edited by Rowcliffe, A.F. 113-118. Washington Dc:US Department of Energy, Office of Fusion Energy Sciences.PNNL-SA-31870.