| 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 | |
| Source Publication | Carbon
 |
| ISSN | 0008-6223 |
| Volume | 51Pages:381-389 |
| Abstract | 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. |
| description.department | [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 |
| Keyword | Reinforced Carbon/carbon Composites Carbon-carbon Composites In-situ Growth Nanocapsules Deposition Particles Nanoparticles Encapsulation Nanotubes |
| URL | 查看原文 |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/71385 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation 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. |
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