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Fabrication of silicon nitride/ boron nitride nanocomposite powder

Abstract

Si3N4/BN nanocomposite powders with the microstructure of the micro-sized α-Si3N4 particles coated with nano-sized BN particles were synthesized via the chemical reaction of boric acid, urea, and α-Si3N4powder in a hydrogen gas. The results of XRD, TEM, and selected area electron diffraction showed that amorphous BN and a little amount of turbostratic BN(t-BN) were coated on Si3N4 particles as the second phase after reaction at 1100°C. After reheating the composite powders at 1450°C in a nitrogen gas, the amorphous and turbostratic BN is transformed into h-BN. These nanocomposite powders can be used to prepare Si3N4/BN ceramic composites by hot-pressing at 1800°C, which have perfect machinability and can be drilled with normal metal tools.

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References

  1. 1.

    Niihara, K., New design concept of structural ceramics-Ceramic nanocomposites, J. Ceram. Soc. Jpn., 1991, 99(10): 974–982.

  2. 2.

    Wakai, F., Kodama, Y., Sakaguchi, S. et al., A superplastic covalent crystal composite, Nature, 1990, 344: 421–423

  3. 3.

    Niihara, K., Suzuki, Y., Strong monolithic and composite MoSi2 materials by nanostructure design, Mater. Sci. Eng., 1999, A261: 6–15.

  4. 4.

    Wang, H., Gao, L., Hong, J. et al., Properties and microstructure of SiC-ZrO2(3Y)-Al2O3 nanocomposite ceramics, Journal of Inorganic Materials (in Chinese), 1999, 14(5): 795–799.

  5. 5.

    Kusunose, T., Chao, Y. H., Sekino, T. et al., Mechanical properties of Si3N4/BN composites by chemical processing, Key Eng. Mater., 1999, 161–163, 475–480.

  6. 6.

    Wang, X., Qiao, G., Jin, Z., New advances in study of machinable ceramics, Materials Review (in Chinese), 2001, 15(4): 26–29.

  7. 7.

    Kusunose, T., Sekino, T., Choa, Y. H. et al., Machinability of silicon nitride/boron nitride nanocomposite, J. Am. Ceram. Soc., 2002, 85(11): 2689–2695.

  8. 8.

    Niihara, K., Izaki, K., Nakahira, A., The Si3N4-SiC nanocomposites with high strength at elevated temperature, J. Jpn. Soc. Powder and Powder Metall., 1990, 37(2): 352–356.

  9. 9.

    Huang, Z., Jiang, D., Fabrication technology of SiC and Si3N4 nano-ceramic powders, Journal of Chinese Ceramic Society (in Chinese), 1996, 24(5): 570–577.

  10. 10.

    Guo, J., Feng, C., The recent progress on nano-ceramics, Chinese Journal of Materials Research (in Chinese), 1995, 9(5): 412–419.

  11. 11.

    Tian, J., Li, J., Dong, L., Synthesis of silicon nitride/silicon carbide nanocomposite powders through partial reduction of silicon nitride by pyrolyzed carbon, J. Am. Ceram. Soc., 1999, 82(9): 2548–2550.

  12. 12.

    Choi, J. Y., Kim, C. H., Kim, D. K., Carbothermic synthesis of monodispersed spherical Si3N4/SiC nanocomposite powder, J. Am. Ceram. Soc., 1999, 82(10): 2665–2671.

  13. 13.

    Gao, J., Xiao, H., Du, H., Preparation of nanosized Si3N4-SiC(Y2O3) composite powders by ammono sol-gel processing, Journal of Chinese Ceramic Society (in Chinese), 1998, 26(5): 586–591.

  14. 14.

    Hojo, J., Control of nanocomposite structure and properties using fine composite particles, J. Jpn. Soc. Powder and Powder Metall., 1998, 45(12): 1151–1156.

  15. 15.

    Brožek, V., Hubaček, M., A contribution to the crystallochemistry of boron nitride, J. Solid State Chem., 1992, 100: 120–129.

  16. 16.

    Hagio, T., Nonaka, K., Sato, T., Microstructural development with crystallization of hexagonl boron nitride, J. Mater. Sci. Lett., 1997, 16: 795–798.

  17. 17.

    Kusunose, T., Sekino, T., Choa, Y. H. et al., Fabrication and microstructure of silicon nitride/boron nitride nanocomposites, J. Am. Ceram. Soc., 2002, 85(11): 2678–2688.

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Author information

Correspondence to Xiangdong Wang.

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Wang, X., Qiao, G., Kusunose, T. et al. Fabrication of silicon nitride/ boron nitride nanocomposite powder. Chin.Sci.Bull. 48, 430–433 (2003). https://doi.org/10.1007/BF03183243

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Keywords

  • silicon nitride
  • boron nitride
  • composites
  • microstructure
  • machinability