摘要
碳纤维具有多晶多相特性,为了研究微晶结构特性对热导率的影响,本文通过XRD对碳纤维的微观特征结构参数的表征,对导热性能与微观特征结构的关联性进行了研究。研究结果表明,碳纤维热导率随着石墨微晶的基面宽度(La)、堆砌厚度(Lc)和平均堆垛层数(N)的增大而增大,随着孔隙率(Vp)的增大而降低。基于Raman图谱的分峰拟合信息,对碳纤维的石墨化度进行分析。结果显示,碳纤维的石墨化度越大,热导率越高。
Carbon fibers were multiphase polycrystalline materials.To study the influence of microcrystalline structure characteristics on thermal conductivity,the characteristics of the microstructure of carbon fiber,the relationship between thermal conductivity and microstructure was studied by XDR.The results highlight that the thermal conductivities increases with the increase of lateral size(L_(a)),stacking thickness(L_(c)),average stacking layers(N)of graphitic microcrystals and decreases with the increase of porosity(V_(p)).Based on the peak fitting information of Raman spectra,the graphitization degree of carbon fibers was analyzed.The results reveal that the higher the graphitization degree of carbon fiber,the higher the thermal conductivity.
作者
何端鹏
张磊
高鸿
李岩
王茹
HE Duanpeng;ZHANG Lei;GAO Hong;LI Yan;WANG Ru(China Academy of Space Technology,Beijing 100094;Beijing Office 1,Military Representative Bureau,Equipment Department,Space System Department of Strategic Support Force,Beijing 100074)
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2023年第2期105-110,共6页
Aerospace Materials & Technology
关键词
碳纤维
热导率
微观特征结构
微晶尺寸
孔隙率
石墨化度
Carbon fiber
Thermal conductivity
Microstructure feature
Microcrystallite size
Porosity
Graphitization degree
