Transmission electron microscopy study of the microstructure of unidirectional C/C composites fabricated by catalytic chemical vapor infiltration

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	Transmission electron microscopy study of the microstructure of unidirectional C/C composites fabricated by catalytic chemical vapor infiltration
	Y. Q. Liu; L. L. He; X. F. Lu; P. Xiao
	2013
发表期刊	Carbon
ISSN	0008-6223
卷号	51 页码:381-389
摘要	Unidirectional carbon/carbon (C/C) composites were fabricated by catalytic chemical vapor infiltration, using electroless Ni-P as catalyst. Transmission electron microscopy (TEM) investigations indicate that the catalyst particles (100-800 nm) in the pyrocarbon (PyC) matrix are composed of Ni3P and Ni phases, but only the Ni3P phase was observed in the tiny catalyst particles (<50 nm) in carbon fibers. The catalyst particles in the matrix were encapsulated by high-textured PyC shells, in which openings were observed. The thicknesses of the medium-textured PyC in the composites (720-850 nm) are greater than in conventional C/C composites (660-740 nm), but have no significant difference in texture degree. Catalysts were partially extruded out of the PyC shells and migrated into the carbon fibers, leading to the catalytic graphitization of the carbon fibers, and their structural homogeneity was destroyed. Based on the TEM observation, a dissolution/precipitation mechanism was proposed for the catalytic graphitization of carbon fibers, and a dissolution/precipitation/encapsulation/fracture/extrusion mechanism was proposed for the encapsulation of catalyst particles. (C) 2012 Elsevier Ltd. All rights reserved.
部门归属	[liu, yequn ; he, lianlong] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [lu, xuefeng ; xiao, peng] cent s univ, state key lab powder met, changsha 410083, hunan, peoples r china. [liu, yequn] chinese acad sci, grad univ, 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	Reinforced Carbon/carbon Composites Carbon-carbon Composites In-situ Growth Nanocapsules Deposition Particles Nanoparticles Encapsulation Nanotubes
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71385
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Q. Liu,L. L. He,X. F. Lu,et al. Transmission electron microscopy study of the microstructure of unidirectional C/C composites fabricated by catalytic chemical vapor infiltration[J]. Carbon,2013,51:381-389.
APA	Y. Q. Liu,L. L. He,X. F. Lu,&P. Xiao.(2013).Transmission electron microscopy study of the microstructure of unidirectional C/C composites fabricated by catalytic chemical vapor infiltration.Carbon,51,381-389.
MLA	Y. Q. Liu,et al."Transmission electron microscopy study of the microstructure of unidirectional C/C composites fabricated by catalytic chemical vapor infiltration".Carbon 51(2013):381-389.