Abstract
Stoichiometric and near-stoichiometric silicon carbide fibers, derived from the polymer polycarbosilane, have been characterized by scanning Auger and transmission electron microscope techniques. Excess carbon usually appeared in the fibers, but it could be eliminated by controlling processing conditions. The fibers consisted mainly of sub-micrometer-sized SiC microcrystals, with a considerably twinned and stacking-faulted [Beta]-SiC structure. Free carbon, which appeared in the form of graphite, was the only detectable intergranular phase in the nonstoichiometric SiC fibers, while the stoichiometric SiC fibers contained no detectable second phase whatsoever.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
