Carbon/carbon composite material and preparation method thereof: Fid-Bau Portal

Carbon/carbon composite material and preparation method thereof

ZHANG ZIHE / HE XIAOJUAN / YIN YONG / CHEN BIN

The invention discloses a carbon/carbon composite material and a preparation method thereof, and belongs to the field of composite materials. Comprising the following steps: S1, taking a carbon felt, performing acid pickling and first high-temperature purification to prepare a blank, performing a PIP process and a first CVD process to prepare powder, and performing a second CVD process to obtain a material A; s2, mixing the material A, petroleum coke and graphite powder according to a mass ratio of (30-60): (30-60): (5-10) to obtain a material B; s3, carbon fibers are taken, and a PyC interface layer is prepared on the surfaces of the carbon fibers through a third CVD technology; s4, mixing the material B, carbon fibers, asphalt powder and an auxiliary agent according to a mass ratio of (30-80): (1-20): (1-30): (1-3) to obtain a material C; s5, preparing a green body material through a forming process; and S6, carrying out densification and purification treatment on the green body material. The preparation period is short, the cost is low, the finished product has good mechanical properties and conductivity, the density is high, the porosity is low and uniform, powder and slag do not fall after long-term use, and the corrosion-resistant and aging-resistant effects are good.

本发明公开了一种碳/碳复合材料及其制备方法，属于复合材料领域。包括以下步骤：S1、取碳毡，经酸洗、第一次高温纯化后制坯，经PIP工艺、第一次CVD工艺后制粉，经第二次CVD工艺后，得到物料A；S2、将物料A、石油焦、石墨粉按质量比(30～60)：(30～60)：(5～10)混合得到物料B；S3、取碳纤维，经第三次CVD工艺在碳纤维表面制备PyC界面层；S4、将物料B、碳纤维、沥青粉、助剂按质量比(30～80)：(1～20)：(1～30)：(1～3)混合，得到物料C；S5、通过成型工艺制备坯体材料；S6、对坯体材料进行增密和纯化处理。本发明制备周期短、成本低，成品具备良好的力学性能和导电性能，且密度高、孔隙率低且均匀，长期使用不掉粉掉渣，耐侵蚀，耐老化效果好。

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