Structure and properties of silicon carbide fibers as function of their synthesis conditions

Silicon carbide fibers were synthesized from hydrate cellulose precursors by means of their carbonization in the presence of silica; carbothermal reduction applying carbonized hydrate cellulose fibers; liquid-phase siliconizing of carbonized hydrate cellulose fibers. By methods of thermal analysis, IR-spectroscopy and x-ray diffraction mechanisms of synthesis processes of silicon carbide fibers were studied. Phase composition and structures of obtained SiC-fibers were investigated and their mechanical properties were examined. It was found the maximal strength characterizes fibers synthesized by the method of liquid-phase siliconizing of carbonized hydrate cellulose fibers. The synthesized fibers are destined for serving as reinforcing agents of polymer, metal, ceramic and carbon matrices.