Microstructure difference between core and skin of T700 carbon fibers in heat-treated carbon/carbon composites

IMR OpenIR

	Microstructure difference between core and skin of T700 carbon fibers in heat-treated carbon/carbon composites
	G. S. Zhou; Y. Q. Liu; L. L. He; Q. G. Guo; H. Q. Ye
	2011
发表期刊	Carbon
ISSN	0008-6223
卷号	49 期号:9 页码:2883-2892
摘要	The core and skin microstructure of T700 carbon fibers in carbon/carbon composites, prepared with chemical vapor infiltration (CVI) at 1000 degrees C and heat treated at 2300 and 2800 degrees C, have been studied by means of high-resolution transmission electron microscopy (HRTEM). The orientation angles of the graphitic basal planes obtained from selected-area electron-diffraction patterns show that the structure difference between the core and skin is a change of the degree of preferred orientation of the graphitic basal planes which decreases gradually from the skin region to the core region after CVI at 1000 degrees C. With increasing heat-treatment temperature, the basal planes orient parallel to the fiber axis, first in the skin region and then in the core region. In addition, the diameter of the core region decreases considerably from about 3.3 to 2.2 mu m after heat treatment at 2800 degrees C. HRTEM lattice-fringe images show that the graphitic crystallite size increases significantly both in the core and skin, but more in the skin. Moreover, with increasing crystallite size, pores of nanometer scale start to form in the fiber. (C) 2011 Elsevier Ltd. All rights reserved.
部门归属	[zhou, gengheng; liu, yequn; he, lianlong; ye, hengqiang] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [guo, quangui] chinese acad sci, inst coal chem, key lab carbon mat, taiyuan 030001, shanxi, peoples r china. [zhou, gengheng; liu, yequn] chinese acad sci, grad sch, beijing 100049, peoples r china.;he, ll (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;llhe@imr.ac.cn
关键词	Polarized-light Microscopy X-ray-scattering Electron-microscopy Texture Microtexture Diffraction
URL	查看原文
WOS记录号	WOS:000291188300001
引用统计	被引频次：99[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/30984
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. S. Zhou,Y. Q. Liu,L. L. He,et al. Microstructure difference between core and skin of T700 carbon fibers in heat-treated carbon/carbon composites[J]. Carbon,2011,49(9):2883-2892.
APA	G. S. Zhou,Y. Q. Liu,L. L. He,Q. G. Guo,&H. Q. Ye.(2011).Microstructure difference between core and skin of T700 carbon fibers in heat-treated carbon/carbon composites.Carbon,49(9),2883-2892.
MLA	G. S. Zhou,et al."Microstructure difference between core and skin of T700 carbon fibers in heat-treated carbon/carbon composites".Carbon 49.9(2011):2883-2892.