Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Preparation of TiB2 sintered compacts by hot pressing

  • 106 Accesses

  • 21 Citations


A sintered compact of titanium diboride (TiB2) was prepared by hot pressing of the synthesized TiB2 powder, which was obtained by a solid-state reaction between TiN and amorphous boron. Densification of the sintered compact occurred at 20 MPa and 1800° C for 5 to 60 min with the aid of a reaction sintering, including the TiB2 formation reaction between excess 20 at % amorphous boron in the as-synthesized powder (TiB2 + 0.2B) and intentionally added 10 at % titanium metal. A homogeneous sintered compact of a single phase of TiB2, which was prepared by hot pressing for 30 min from the starting powder composition [(TiB2 + 0.2B) + 0.1 Ti], had a fine-grained microstructure composed of TiB2 grains with diameters of 2 to 3 μm. The bulk density was 4.47 g cm−3, i.e. 98% of the theoretical density. The microhardness, transverse rupture strength and fracture toughness of the TiB2 sintered compact were 2850 kg mm−2, 48 kg mm−2 and 2.4 MN m−3/2, respectively. The thermal expansion coefficient increased with increasing temperature up to 400° C and had a constant value of 8.8 x 10−6 deg−1 above 500° C.

This is a preview of subscription content, log in to check access.


  1. 1.

    G. V. Samsonov andI. M. Vinitskii, “Handbook of Refractory Compounds” (IFI/Plenum, New York, 1980) p. 40.

  2. 2.

    H. R. Baumgartner andR. A. Steiger,J. Amer. Ceram. Soc. 67 (1984) 207.

  3. 3.

    V. I. Matkovich, “Boron and Refractory Borides” (Springer-Verlag, Berlin, 1977) p. 457.

  4. 4.

    T. Watanabe andS. Kouno,Ceram. Bull. 61 (1982) 970.

  5. 5.

    C. B. Finch, P. F. Becher, P. Angelini, S. Baik, C. E. Bamberger andJ. Brynestad,Adv. Ceram. Mater. 1 (1986) 50.

  6. 6.

    T. Matsudaira, H. Itoh, S. Naka andH. Hamamoto,J. Jpn Soc. Powder Powder Metall. 35 (1988) 229.

  7. 7.

    T. Matsudaira, H. Itoh, S. Naka, H. Hamamoto andM. Obayashi,J. Mater. Sci. 23 (1988) 288.

  8. 8.

    T. Matsudaira, H. Hamamoto, M. Obayashi, H. Itoh andS. Naka, in Proceedings of the 9th International Symposium on Boron, Borides and Related Compounds, Duisburg, Federal Republic of Germany, 1987, p. 438.

  9. 9.

    H. Itoh, T. Matsudaira, S. Naka andH. Hamamoto,J. Mater. Sci. 24 (1989) 420.

Download references

Author information

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Itoh, H., Naka, S., Matsudaira, T. et al. Preparation of TiB2 sintered compacts by hot pressing. J Mater Sci 25, 533–536 (1990). https://doi.org/10.1007/BF00714070

Download citation


  • Titanium
  • Thermal Expansion
  • Fracture Toughness
  • Thermal Expansion Coefficient
  • Theoretical Density