中间相沥青纤维基自粘结炭材料的成型与微观形貌研究  

Study on the Forming Progress and Microstructure of Self-bonding Carbon Material Based on Mesophase Pitch Fiber

作　　者：费又庆[1,2] 徐争博 袁剑民[1] 赵玉飞[1] 李维维[1] 占莹 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]湖南大学汽车车身先进设计与制造国家重点实验室,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2013年第10期99-104,共6页Journal of Hunan University:Natural Sciences

基　　金：湖南大学“汽车车身先进设计与制造国家重点实验室课题(734215002)

摘　　要：实验采用热重分析模拟中间相沥青纤维的预氧化过程,然后利用热机械分析对沥青纤维径向热压变形行为及热压自粘结过程进行了研究,并借助扫描电镜观察自粘结沥青纤维板和自粘结炭纤维板的微观形貌.当沥青纤维氧化增重量为2.1%时,纤维径向变形率可达36%,易于自粘结成型,所得自粘结板表面平整,纤维接触面紧密粘结.当氧化增重量为1.3%时,热压使沥青纤维的微晶取向破坏而融化,不能自粘结成型.当氧化增重量大于3.3%时,沥青纤维的径向变形率很小,自粘结性能差.The preoxidation of mesophase pitch fiber was simulated by means of thermo gravimetric analysis.Then,the radial deformation behavior and self-bonding process of pitch fiber on hot press were studied through thermal mechanical analysis.And the microstructure of self-bonding pitch fiber boards and self-bonding carbon fiber boards was analyzed with scanning electron microscopy.When the oxidation weight gain was 2.1 ％,the radial deformation rate of pitch fiber was 36 ％,which indicated that the pitch fiber was easy to be processed.Moreover,the surface of self bonding board was smooth and the contact surfaces of fibers were closely bonded.When the oxidation weight gain was 1.3 ％,the pitch fiber was molten for the destroying of microcrystal orientation and unable to be processed.When the oxidation weight gain was above 3.3％,the radial deformation rate of pitch fiber was small and the self-bonding ability of pitch fiber was poor.

关 键 词：氧化 中间相沥青纤维 热变形 自粘结 微观形貌 

分 类 号：TQ342.742[化学工程—化纤工业]