a1 Department of Materials Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106
a2 NASA Lewis Research Center, Cleveland, Ohio 44135
The microstructures of carbon-rich regions in chemically vapor deposited SCS-6 SiC fibers have been studied by electron diffraction and high resolution transmission electron microscopy. The microstructures of the carbon in the substrate filament and the outer coating layers of the fiber are consistent with different distributions of Oberlin's model of Basic Structural Units (BSUs)1 while that of the inner substrate coating is consistent with turbostratic carbon (TC).
(Received May 29 1990)
(Accepted August 23 1990)