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Chinese Journal of High Pressure Physics  > 2014  >  28(4): 394-398.
HAN Lei, LIU Bao-Chang, LI Wen-Min, LIU Ying. Synthesis and Characterization of CrB2 by High Temperature and High Pressure Method[J]. Chinese Journal of High Pressure Physics, 2014, 28(4): 394-398. doi: 10.11858/gywlxb.2014.04.002
Citation: HAN Lei, LIU Bao-Chang, LI Wen-Min, LIU Ying. Synthesis and Characterization of CrB2 by High Temperature and High Pressure Method[J]. Chinese Journal of High Pressure Physics, 2014, 28(4): 394-398. doi: 10.11858/gywlxb.2014.04.002
shu

Synthesis and Characterization of CrB2 by High Temperature and High Pressure Method

doi: 10.11858/gywlxb.2014.04.002
  • 1.

    Construction Engineering College, Jilin University, Changchun 130026, China

  • 2.

    Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

  • 3.

    State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China

  • Received Date: 01 Jun 2014
  • Rev Recd Date: 18 Jun 2014
    Abstract
  • With the elemental boron powder and chromium powder as raw materials, CrB2 compound was prepared successfully at 6 GPa and 1 200 ℃ by using high temperature and high pressure method.X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (EDS), hardness tester and scanning electron microscopy (SEM) were used to characterize the physical properties of the sample.The results show that the synthetic CrB2 is hexagonal structure with space group of P6/mmm, and the lattice constants a and b are 0.297 and 0.307 nm, respectively.From the SEM micrographs, it can be seen that the grain diameter ranges from 5 to 40 μm, and the crystalline quality is good.Moreover, the synthetic sample exhibits high hardness value.By comparing the experimental results obtained under different synthetic conditions, it is found that both the temperature and ratio of raw materials affect the synthesis of CrB2, and an increase in the proportion of boron in raw materials contributes to the formation of the desired product CrB2.

     

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