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高性能SiC纤维在耐高温、抗氧化领域有着重要的应用前景,而纤维直径是影响纤维力学性能的主要因素之一。随着纤维直径降低,纤维强度显著升高。利用静电纺丝工艺,结合先驱体热解转化法制备SiC,探索了一种简单、易行的制备亚微米/纳米SiC纤维的方法。由聚碳硅烷(PCS)出发,研究了PCS溶液静电纺丝的工艺参数对纺丝性的影响,PCS原纤维经不熔化、N2中1200℃热处理1h,成功的制备了纤维直径在0.5原2μm之间分布均匀的SiC纤维。
High-performance SiC fiber has an important application prospect in the field of high temperature resistance and oxidation resistance, and the fiber diameter is one of the main factors that affect the mechanical properties of the fiber. As the fiber diameter decreases, the fiber strength increases significantly. Using electrospinning technology, combined with the precursor pyrolysis conversion method for the preparation of SiC, to explore a simple and easy to prepare submicron / nano SiC fiber method. Starting from polycarbosilane (PCS), the effects of technological parameters of electrospinning PCS solution on spinnability were studied. PCS fibrils were not melted and heat treated in N2 at 1200 ℃ for 1h. Between the uniform distribution of SiC fiber.