Carbon fiber-ultrahigh-temperature ceramic composite material and preparation method thereof: Fid-Bau Portal

Carbon fiber-ultrahigh-temperature ceramic composite material and preparation method thereof

LI JIANGTAO / WU HENG / GUO CHEN / WEI QINGBO / ZHAI HAIFENG

The invention discloses a carbon fiber-ultrahigh-temperature ceramic composite material and a preparation method thereof. The preparation method comprises the following steps: (1) uniformly mixing 1 # liquid resin and copper powder, and adjusting the viscosity of slurry to obtain a precursor A; (2) dipping the precursor A into a carbon fiber preform, and cracking to obtain an intermediate B; (3) uniformly mixing 2 # liquid resin with ultrahigh-temperature ceramic particles, and adjusting the viscosity of the slurry to obtain a precursor C; (4) impregnating the precursor C into the intermediate B by adopting a PIP method, and then performing curing and vacuum cracking to obtain an intermediate D1; (5) replacing the intermediate B with the intermediate D1, and repeating the steps (3)-(4) to obtain an intermediate D2; and so on, until an intermediate Dn is obtained; (6) carrying out heat treatment on the intermediate Dn to remove copper to obtain a porous intermediate E; and (7) dipping the precursor C into the porous intermediate E, and cracking to obtain the carbon fiber-ultrahigh-temperature ceramic composite material. The composite material prepared by the invention is high in ultrahigh-temperature ceramic content and has good high-temperature resistance.

本发明公开一种碳纤维‑超高温陶瓷复合材料及其制备方法。（1）、将1#液态树脂、铜粉混匀并调节浆料粘度，得前驱体A；（2）、将前驱体A浸渍到碳纤维预制体中，裂解，得中间体B；（3）、将2#液态树脂与超高温陶瓷颗粒混匀并调节浆料粘度，得前驱体C；（4）、采用PIP法先将前驱体C浸渍到中间体B中，然后固化、真空裂解，得中间体D1；（5）、将中间体D1代替中间体B，重复步骤（3）‑（4）得中间体D2；以此类推，直至得到中间体Dn；（6）、对中间体Dn进行热处理除铜，得多孔中间体E；（7）、将前驱体C浸渍到多孔中间体E中，裂解，得到碳纤维‑超高温陶瓷复合材料。本发明制备的复合材料，超高温陶瓷含量高，具有良好的耐高温性能。

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