低成本制备沥青基C/C复合材料  

Low-cost preparation of pitch-based C/C composite

作　　者：刘业青 吴松松 刘芸 王怡洋 吴赟 王鑫昊 张衡 李道谦 温广武 Liu Ye-qing;Wu Song-song;Liu Yun;Wang Yi-yang;Wu Yun;Wang Xin-hao;Zhang Heng;Li Dao-qian;Wen Guang-wu(School of Material Science and Engineering,Shandong University of Technology,Shandong Zibo 255086,China)

机构地区：[1]山东理工大学材料科学与工程学院,山东淄博255086

出　　处：《炭素技术》2021年第5期44-47,共4页Carbon Techniques

基　　金：山东省重点研发计划(2019JMRH0402)。

摘　　要：降低沥青基炭纤维增强C/C复合材料生产成本的研究一直受到关注。本文以鳞片石墨为基体,中间相沥青为黏结剂,炭纤维为增强相,提出了一种周期短、工艺简单的沥青基C/C复合材料的制备方法,并研究中间相沥青与石墨配比及低温预处理对C/C复合材料性能的影响。结果表明:适当的中间相沥青含量可使基体与炭纤维的界面牢固,低温预处理有利于C/C复合材料的致密;因此,当中间相沥青与石墨的比例为1∶1时,300℃,10 MPa预处理,并于1 400℃炭化后,C/C复合材料密度达到1.8 g/cm^(3),弯曲强度和断裂韧性分别达到(388±16) MPa,(6.10±0.83) MPa·m^(1/2)。Research on reducing the production cost of pitch-based C/C composite materials has always attracted attention. This paper proposes a method for preparing pitch-based C/C composites with a short preparation cycle and simple process, in which flake graphite is used as the matrix, mesophase pitch as the binder, and carbon fiber as the reinforcing phase, and C/C composite with different ratio of mesophase pitch to graphite are compared. The results show that appropriate mesophase pitch content could make the matrix and carbon fiber strong interface and easy to compact C/C composite. When the ratio of mesophase pitch to graphite is 1 ∶1,pretreated at 300 ℃,10 MPa, and carbonized at 1 400 ℃, the density reaches 1.8 g/cm^(3),the bending strength and fracture toughness reach(388±16) MPa and(6.10±0.83) MPa·m^(1/2), respectively, and the C/C composite show the best mechanical properties.

关 键 词：沥青基炭纤维 鳞片石墨 C/C复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]