Synthesis of Continuous Sic Fibers with High Tensile Strength

Continuous Sic fibers with a tensile strength of 350 kg/mm 2 and a Young's modulus of 30 tons/mm 2 were synthesized from an organometallic polymer. Continuous fibers were first obtained by heat‐treating a polycarbosilane polymer which had been synthesized from dimethyldichlorosilane. The fiber, which contains ultrafine‐grain crystallites of β‐Sic, has no fiber texture measurable by X‐ray diffraction and high‐voltage electron microscopy.