Superhard B-C-N materials synthesized in nanostructured bulks

Y. Zhao; D. W. He; L. L. Daemen; T. D. Shen; R. B. Schwarz; Y. Zhu; D. L. Bish; J. Huang; J. Zhang; G. Shen; J. Qian; T. W. Zerda

doi:10.1557/JMR.2002.0454

Superhard B-C-N materials synthesized in nanostructured bulks

Y. Zhao, D. W. He, L. L. Daemen, T. D. Shen, R. B. Schwarz, Y. Zhu, D. L. Bish, J. Huang, J. Zhang, G. Shen, J. Qian, T. W. Zerda

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227 Scopus citations

Abstract

We report here the high-pressure synthesis of well-sintered millimeter-sized bulks of superhard BC₂N and BC₄N materials in the form of a nanocrystalline composite with diamond-like amorphous carbon grain boundaries. The nanostructured superhard B-C-N material bulks were synthesized under high P-T conditions from amorphous phases of the ball-milled molar mixtures. The synthetic B-C-N samples were characterized by synchrotron x-ray diffraction, high-resolution transmission electron microscope, electron energy-loss spectra, and indentation hardness measurements. These new high-pressure phases of B-C-N compound have extreme hardnesses, second only to diamond. Comparative studies of the high P-T synthetic products of BC₂N, BC₄N, and segregated phases of diamond + cBN composite confirm the existence of the single B-C-N ternary phases.

Original language	English
Pages (from-to)	3139-3145
Number of pages	7
Journal	Journal of Materials Research
Volume	17
Issue number	12
DOIs	https://doi.org/10.1557/JMR.2002.0454
State	Published - Dec 2002
Externally published	Yes

Funding

This work was performed under the auspices of the United States Department of Energy (DOE) under Contract W-7405-ENG-36 with the University of California. The research project was supported by Los Alamos Laboratory-Directed Research and Development funding and by the DOE Office of Industrial Technology funding of Advanced Materials for the Future.

Funders	Funder number
DOE Office of Industrial Technology funding of Advanced Materials for the Future
Los Alamos Laboratory-Directed Research and Development
U.S. Department of Energy	W-7405-ENG-36
University of California

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10.1557/JMR.2002.0454

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title = "Superhard B-C-N materials synthesized in nanostructured bulks",

abstract = "We report here the high-pressure synthesis of well-sintered millimeter-sized bulks of superhard BC2N and BC4N materials in the form of a nanocrystalline composite with diamond-like amorphous carbon grain boundaries. The nanostructured superhard B-C-N material bulks were synthesized under high P-T conditions from amorphous phases of the ball-milled molar mixtures. The synthetic B-C-N samples were characterized by synchrotron x-ray diffraction, high-resolution transmission electron microscope, electron energy-loss spectra, and indentation hardness measurements. These new high-pressure phases of B-C-N compound have extreme hardnesses, second only to diamond. Comparative studies of the high P-T synthetic products of BC2N, BC4N, and segregated phases of diamond + cBN composite confirm the existence of the single B-C-N ternary phases.",

author = "Y. Zhao and He, {D. W.} and Daemen, {L. L.} and Shen, {T. D.} and Schwarz, {R. B.} and Y. Zhu and Bish, {D. L.} and J. Huang and J. Zhang and G. Shen and J. Qian and Zerda, {T. W.}",

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AU - Zhao, Y.

AU - He, D. W.

AU - Daemen, L. L.

AU - Shen, T. D.

AU - Schwarz, R. B.

AU - Zhu, Y.

AU - Bish, D. L.

AU - Huang, J.

AU - Zhang, J.

AU - Shen, G.

AU - Qian, J.

AU - Zerda, T. W.

PY - 2002/12

Y1 - 2002/12

N2 - We report here the high-pressure synthesis of well-sintered millimeter-sized bulks of superhard BC2N and BC4N materials in the form of a nanocrystalline composite with diamond-like amorphous carbon grain boundaries. The nanostructured superhard B-C-N material bulks were synthesized under high P-T conditions from amorphous phases of the ball-milled molar mixtures. The synthetic B-C-N samples were characterized by synchrotron x-ray diffraction, high-resolution transmission electron microscope, electron energy-loss spectra, and indentation hardness measurements. These new high-pressure phases of B-C-N compound have extreme hardnesses, second only to diamond. Comparative studies of the high P-T synthetic products of BC2N, BC4N, and segregated phases of diamond + cBN composite confirm the existence of the single B-C-N ternary phases.

AB - We report here the high-pressure synthesis of well-sintered millimeter-sized bulks of superhard BC2N and BC4N materials in the form of a nanocrystalline composite with diamond-like amorphous carbon grain boundaries. The nanostructured superhard B-C-N material bulks were synthesized under high P-T conditions from amorphous phases of the ball-milled molar mixtures. The synthetic B-C-N samples were characterized by synchrotron x-ray diffraction, high-resolution transmission electron microscope, electron energy-loss spectra, and indentation hardness measurements. These new high-pressure phases of B-C-N compound have extreme hardnesses, second only to diamond. Comparative studies of the high P-T synthetic products of BC2N, BC4N, and segregated phases of diamond + cBN composite confirm the existence of the single B-C-N ternary phases.

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JO - Journal of Materials Research

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ER -

Superhard B-C-N materials synthesized in nanostructured bulks

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