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发明公开
CN1465549A 皮芯双组分纤维法制备连续碳化硅纤维的生产工艺 失效 - 权利终止

皮芯双组分纤维法制备连续碳化硅纤维的生产工艺
摘要：
涉及一种制备连续SiC纤维的生产工艺。首先将高分子聚合物溶解在溶剂中制成皮液，然后将分散剂、高分子聚合物、SiC粉末、烧结助剂溶解或分散在溶剂中制成芯液。将皮液和芯液在压力下从皮芯复合喷丝组件的微孔挤出，皮液包覆在芯液的外部。用湿法或干法使液流线固化，所得纤维经拉伸和干燥后卷绕得原纤维。其芯部是由高分子粘结起来的陶瓷粉术，皮部是纯高分子。原纤维在空气中低温氧化处理，在高纯度Ar气氛下高温烧结获得芯部为SiC纤维而皮部为碳纤维的连续纤维。最后氧化去除表皮的碳，得连续的烧结SiC纤维。其纤维直径可降到20μm以下，化学成分接近计量纯的SiC，α－SiC的含量高于90％，相对密度可高达98％以上。
摘要（英）：

The production process of continuously preparing SiC fibre includes the following steps: dissolving high-molecular polymer in solvent to prepare skin solution, dissolving or dispersing the dispersingagent, high-molecular polymer, SiC powder and sintering adjuvant into solvent to prepare core solution, extruding skin solution and core solution from microhole of skin-core composite spinning component under the pressure to make skin solution cover exterior of the core solution, using wet process or dry process to solidifying fluid-flow wire, drawing, drying and winding so as to obtain raw fibre, its core portion is ceramic powder adhered by polymer and its skin portion is made of pure high-molecular material.

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