TY - JOUR
T1 - Superhard B-C-N materials synthesized in nanostructured bulks
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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U2 - 10.1557/JMR.2002.0454
DO - 10.1557/JMR.2002.0454
M3 - RGC 21 - Publication in refereed journal
SN - 0884-2914
VL - 17
SP - 3139
EP - 3145
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 12
ER -