Nanostructured hybrid carbon nanotube-ceramics heterostructures: Microstructure and forming mechanism

Changqing Hong; Baoshen Xu; Xinghong Zhang; Jiecai Han

Nanostructured hybrid carbon nanotube-ceramics heterostructures: Microstructure and forming mechanism

Changqing Hong, Baoshen Xu, Xinghong Zhang, Jiecai Han

Harbin Institute of Technology

Research output: Contribution to conference › Paper › peer-review

Abstract

The interest in carbon nanotubes (CNTs) as reinforcements for ceramic and ceramic matrix composites has been growing considerably. Herein, we have proposed an original catalytic method based on zirconium (Zr) and boron (B)-contained precursors to synthesize CNTs-ZrB₂-ZrO₂ nanostructured composites. Observations show that the in-situ grown CNTs are homogeneously dispersed at each section of the ZrB₂-ZrO₂ matrix. The fragments of CO, CH₄, CO₂ resulting from the ZrB2 polymeric precursor are identified to be the main carbon sources for CNTs growth. The m-ZrO₂ and t-ZrO₂ are produced at 1100-1300^oC, and some ZrO₂ further transforms into ZrB2 pyrolysized at 1500oC. There are two kinds of grown CNTs existed in the produced hybrid heterostructures: (i) the worm-like, disordered and incomplete graphitization CNTs; (ii) the long-length and completely graphitized CNTs. The nucleation and growth of CNTs are dominated and controlled by homogeneous vapor-liquid-solid reactions.

Original language	English
Publication status	Published - 2015
Externally published	Yes
Event	20th International Conference on Composite Materials, ICCM 2015 - Copenhagen, Denmark Duration: 19 Jul 2015 → 24 Jul 2015

Conference

Conference	20th International Conference on Composite Materials, ICCM 2015
Country/Territory	Denmark
City	Copenhagen
Period	19/07/15 → 24/07/15

Keywords

Carbon nanotubes
Ceramics
Hybrid composites
Sintering

Cite this

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title = "Nanostructured hybrid carbon nanotube-ceramics heterostructures: Microstructure and forming mechanism",

abstract = "The interest in carbon nanotubes (CNTs) as reinforcements for ceramic and ceramic matrix composites has been growing considerably. Herein, we have proposed an original catalytic method based on zirconium (Zr) and boron (B)-contained precursors to synthesize CNTs-ZrB2-ZrO2 nanostructured composites. Observations show that the in-situ grown CNTs are homogeneously dispersed at each section of the ZrB2-ZrO2 matrix. The fragments of CO, CH4, CO2 resulting from the ZrB2 polymeric precursor are identified to be the main carbon sources for CNTs growth. The m-ZrO2 and t-ZrO2 are produced at 1100-1300oC, and some ZrO2 further transforms into ZrB2 pyrolysized at 1500oC. There are two kinds of grown CNTs existed in the produced hybrid heterostructures: (i) the worm-like, disordered and incomplete graphitization CNTs; (ii) the long-length and completely graphitized CNTs. The nucleation and growth of CNTs are dominated and controlled by homogeneous vapor-liquid-solid reactions.",

keywords = "Carbon nanotubes, Ceramics, Hybrid composites, Sintering",

author = "Changqing Hong and Baoshen Xu and Xinghong Zhang and Jiecai Han",

note = "Publisher Copyright: {\textcopyright} 2015 International Committee on Composite Materials. All rights reserved.; 20th International Conference on Composite Materials, ICCM 2015 ; Conference date: 19-07-2015 Through 24-07-2015",

year = "2015",

language = "English",

}

TY - CONF

T1 - Nanostructured hybrid carbon nanotube-ceramics heterostructures

T2 - 20th International Conference on Composite Materials, ICCM 2015

AU - Hong, Changqing

AU - Xu, Baoshen

AU - Zhang, Xinghong

AU - Han, Jiecai

PY - 2015

Y1 - 2015

N2 - The interest in carbon nanotubes (CNTs) as reinforcements for ceramic and ceramic matrix composites has been growing considerably. Herein, we have proposed an original catalytic method based on zirconium (Zr) and boron (B)-contained precursors to synthesize CNTs-ZrB2-ZrO2 nanostructured composites. Observations show that the in-situ grown CNTs are homogeneously dispersed at each section of the ZrB2-ZrO2 matrix. The fragments of CO, CH4, CO2 resulting from the ZrB2 polymeric precursor are identified to be the main carbon sources for CNTs growth. The m-ZrO2 and t-ZrO2 are produced at 1100-1300oC, and some ZrO2 further transforms into ZrB2 pyrolysized at 1500oC. There are two kinds of grown CNTs existed in the produced hybrid heterostructures: (i) the worm-like, disordered and incomplete graphitization CNTs; (ii) the long-length and completely graphitized CNTs. The nucleation and growth of CNTs are dominated and controlled by homogeneous vapor-liquid-solid reactions.

AB - The interest in carbon nanotubes (CNTs) as reinforcements for ceramic and ceramic matrix composites has been growing considerably. Herein, we have proposed an original catalytic method based on zirconium (Zr) and boron (B)-contained precursors to synthesize CNTs-ZrB2-ZrO2 nanostructured composites. Observations show that the in-situ grown CNTs are homogeneously dispersed at each section of the ZrB2-ZrO2 matrix. The fragments of CO, CH4, CO2 resulting from the ZrB2 polymeric precursor are identified to be the main carbon sources for CNTs growth. The m-ZrO2 and t-ZrO2 are produced at 1100-1300oC, and some ZrO2 further transforms into ZrB2 pyrolysized at 1500oC. There are two kinds of grown CNTs existed in the produced hybrid heterostructures: (i) the worm-like, disordered and incomplete graphitization CNTs; (ii) the long-length and completely graphitized CNTs. The nucleation and growth of CNTs are dominated and controlled by homogeneous vapor-liquid-solid reactions.

KW - Carbon nanotubes

KW - Ceramics

KW - Hybrid composites

KW - Sintering

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M3 - Paper

AN - SCOPUS:85053132040

Y2 - 19 July 2015 through 24 July 2015

ER -

Nanostructured hybrid carbon nanotube-ceramics heterostructures: Microstructure and forming mechanism

Abstract

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Keywords

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