SiC METHOD OF MANUFACTURING MAT-TYPED SILICON CARBIDE FIBER

The present invention relates to a method of manufacturing mat type silicon carbide (SiC) fibers. According to the present invention, mat type SiC fibers are manufactured through a simplified process, thereby reducing manufacturing costs of the fiber. The method of manufacturing mat type SiC fibers comprises: a step which synthesizes polycarbosilane (PCS); a step which spins the synthesized PCS by blowing high-temperature air to the same at a fast speed to form mat type PCS fibers; a step in which the mat type PCS fibers are heated at the temperature equal to or higher than a softening point of the PCS and the temperature equal to or lower than a melting point for t1 hours to induce surface fusion between the fibers in the mat type PCS fibers; a stabilizing step in which the mat type PCS fibers are heated at the temperature equal to or lower than the softening point of the PCS for t2 hours to render the mat type PCS fibers infusible; and a heat processing step in which the stabilized mat type PCS fibers are thermally treated under the inert gas atmosphere to covert the mat type PCS fibers into mat type SiC fibers. 본 발명은 폴리카보실란(PCS)을 합성하는 단계; 합성된 PCS를 고온의 공기를 고속으로 불어주어 방사함으로써 매트형 PCS 섬유를 형성하는 단계; 상기 매트형 PCS 섬유를, i) 상기 PCS의 연화점 이상 및 용융점 이하섬유-섬유들의 표면의 온도하에서 t1 시간 동안 가열하여 상기 매트형 PCS 섬유의 표면들 간에 융착을 유도하는 단계; 및 ii) 연화점 미만의 온도 하에서 t2 시간 동안 상기 매트형 PCS 섬유를 불융화하는 단계로 이루어진 안정화 단계; 및 안정화된 매트형 PCS 섬유를 불활성가스분위기하서 열처리하여 매트형 SiC 섬유로 전환시키는 열처리 단계를 포함하는 매트형 SiC 섬유의 제조방법을 제공한다.