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Chinese Journal of High Pressure Physics  > 2009  >  23(6): 467-470 .
JI Xiao-Rui, YANG Da-Peng, YANG Xiao-Hong, ZHANG Tie-Chen, . Thermodynamic Analysis of Cubic Boron Nitride Synthesized under HPHT[J]. Chinese Journal of High Pressure Physics, 2009, 23(6): 467-470 . doi: 10.11858/gywlxb.2009.06.011
Citation: JI Xiao-Rui, YANG Da-Peng, YANG Xiao-Hong, ZHANG Tie-Chen, . Thermodynamic Analysis of Cubic Boron Nitride Synthesized under HPHT[J]. Chinese Journal of High Pressure Physics, 2009, 23(6): 467-470 . doi: 10.11858/gywlxb.2009.06.011
shu

Thermodynamic Analysis of Cubic Boron Nitride Synthesized under HPHT

doi: 10.11858/gywlxb.2009.06.011
  • 1.

    Department of Preparatory Course, Shenyang Institute of Engineering, Shenyang 110136, China;

  • 2.

    College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130026, China;

  • 3.

    College of Optical and Electronical Information, Changchun University of Science and Technology, Changchun 130024, China;

  • 4.

    National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China

More Information
  • Corresponding author: JI Xiao-Rui
  • Received Date: 09 Jul 2008
  • Rev Recd Date: 07 Sep 2009
  • Publish Date: 15 Dec 2009
    Abstract
  • We analyzed the relationships between growth condition and phase transition probability, and critical crystal radius respectively by thermodynamics. Then we calculated the critical grain radius rk for forming cBN crystal under high pressure and high temperature (HPHT). Under 6.0 GPa, 1 600 ℃, the rk is around 15 nm. In the thermodynamically stable region of cBN, the results show that under the same pressure, rk is increasing with the elevated temperature; under the same temperature, rk is decreasing with increasing pressure, and the smaller rk is, the higher phase transition probability is. These results are well consistent with experimental data.

     

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    • References(13)
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