摘要
采用ＪＥＭ－２０１０型高分辨透射电镜考察了热解碳基碳／碳复合材料的纤维－基体界面结构。实验发现，由化学气相渗透工艺所获得的热解碳并非仅与碳纤表面进行单一的机械粘合，也不是一个简单平面。其间存在具有感应结构的界面层，它是受碳纤维表面微晶感应而形成的由基本平行于表面且更为细小的微晶所组成的厚约数纳米至数十纳米的过渡层，碳纤维微晶越大，取向性越好，则界面层的厚度也越大，取向性也相应提高。
Interfacial microstructures in as received carbon/carbon composites prepared by CVI were investigated by means of high resolution transmission electron microscope(HREM) JEM 2010.It has been found that the pyrolytic carbon matrix does not merely bond mechanically with carbon fiber surface,and the interface is not a simple plane yet.There exists a transitional layer with a thickness of about several nanometres to several tenfold nanometres between carbon fibre and carbon matrix because of the induction of basal planes of crystallites on the surface layer of the fibers.The transitional layer with an induction sturcture is composed of finer crystallits that are basically parallel to the carbon fibre surface.The bigger in size and the more regular of orientation of the crystallites on carbon fibre surface,the thicker the transitional layer and the better orientations of the crystallites.So this can give a qualtative explanation for why there is different bonding effect between pyrolytic carbon matrix and different kinds of carbon fibres.
出处
《电子显微学报》
CAS
CSCD
1998年第6期722-726,共5页
Journal of Chinese Electron Microscopy Society
关键词
复合材料
界面
热解碳
透射电子显微术
碳/碳
carbon/carbon composite\ interface\ pyrolytic carbon\ transmission electron microscopy
