Deposition mechanism and microstructure of pyrocarbon prepared by chemical vapor infiltration with kerosene as precursor

Wu, Xiaowen; Luo, Ruiying; Zhang, Jincao; Xiang, Qiao; Ni, Yongfeng

doi:10.1016/j.carbon.2009.01.035

Cited by 12 publications

(3 citation statements)

References 23 publications

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“…Chemical vapor infiltration (CVI) with liquid hydrocarbon as precursor is one of the successful methods for fabricating C/C composites with a rapid densification rate and short total fabrication time. [1][2][3][4][5] As we all know, the electrical conductivity of C/C composites is an important parameter for the potential applications in electric railways as contact strips for pantographs and collector shoes. To date, however, there has been seldom work reported about the electrical conductivity of C/C composites.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and electrical resistivity of carbon/carbon composites prepared by thermal gradient chemical vapor infiltration

Fang

et al. 2012

Journal of Reinforced Plastics and Composites

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Carbon/carbon composites were prepared by thermal gradient chemical vapor infiltration with kerosene as precursor. The microstructure and electrical resistivity were examined by polarized light microscopy and low-resistance instrument, respectively. The effects of processing parameters on microstructure as well as the influences of sample density, processing parameters, and needle punch on electrical resistivity of carbon/carbon composites were analyzed. The results show that besides rough laminar, smooth laminar and isotropic pyrocarbon occur at temperatures of 1000 C and 1200 C, respectively. The graphitization degree of composites increases from 16.28% to 63.95% as the heat treatment temperature increases from 2100 C to 2500 C. The electrical resistivity of carbon/carbon composites decreases with increasing heat treatment temperature and sample density but increases as the texture of pyrocarbon varies from rough laminar to smooth laminar. The main mechanism for influencing the electrical resistivity of carbon/carbon composites can be changing carrier concentration, altering grain scattering, or both actions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and electrical resistivity of carbon/carbon composites prepared by thermal gradient chemical vapor infiltration

Fang

et al. 2012

Journal of Reinforced Plastics and Composites

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“…On the other hand, with the rapid densification technology, the cost can be greatly lowered [1]. Therefore, the developed countries focus study on rapid CVI technology, such as CLVI, forced flow CVI [2,3] and so on.…”

Section: Introductionmentioning

confidence: 99%

Growth of Pyrocarbon by Multi-Physics Fields Chemical Vapor Infiltration

Zhang¹

2011

TOMSJ

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A novel rapid chemical vapor infiltration (CVI) processing defined by multi-physics fields CVI was used to fabricate carbon/carbon (C/C) composites. Liquid petrol gas is used as carbon source and the parameters were experimental tested and optimized. The influence of temperature and pressure on the growth of pyrocarbon was investigated in detail. Because of the influence of multi-physics fields, a new surface morpha is grown under control parameters. It is called "Dot Structure". The structure of pyrocarbon is analyzed and characterized by XRD, SEM with EDS, and Raman spectrum. At the end, a simple model of point discharge for growth of pyrocarbon is proposed. The deposited pyrocarbon based on multi-physics fields chemical vapor infiltration is expected to provide an improve performance in rapid C/C composites fabrication.

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Carbon/Carbon Composites

Luo

Zhang

et al. 2011

Wiley Encyclopedia of Composites

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Carbon/carbon (C/C) composites as high temperature structural materials have been widely used in aeronautics and astronautics because of their remarkable mechanical, thermophysical, and tribological properties. For the deep investigation of carbon deposition mechanism, newly developed approaches of fast densification of C/C composites have been indicated, such as thermal gradient chemical vapor infiltration (TCVI), pressure gradient chemical vapor infiltration (PCVI), electrified CVI (ECVI), and chemical liquid‐vaporized infiltration (CLVI). Multilayer coating system provides a new way for the long‐term antioxidation of C/C composites. Carbon nanotubes and nanofibers, forming the bridge between carbon fibers of micrometer size, could also further enhance the mechanical properties of composite materials. Bonded repair of C/C composite structure is used to extend the life of wear or underdesigned components and joins different components at a reasonable cost. All these studies promote the research and development of advanced C/C composites.

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Deposition mechanism and microstructure of pyrocarbon prepared by chemical vapor infiltration with kerosene as precursor

Cited by 12 publications

References 23 publications

Microstructure and electrical resistivity of carbon/carbon composites prepared by thermal gradient chemical vapor infiltration

Microstructure and electrical resistivity of carbon/carbon composites prepared by thermal gradient chemical vapor infiltration

Growth of Pyrocarbon by Multi-Physics Fields Chemical Vapor Infiltration

Carbon/Carbon Composites

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