Advertisement

Journal of Materials Science

, Volume 42, Issue 3, pp 772–778 | Cite as

Spark plasma sintering of ZrB2–ZrC powder mixtures synthesized by MA-SHS in air

  • Takeshi TsuchidaEmail author
  • Satoshi Yamamoto
Article

Abstract

Mechanical activation-assisted self-propagating high-temperature synthesis (MA-SHS) in air was successfully applied to the synthesis of the powder mixtures of ZrB2 and ZrC as a precursor of the ZrB2–ZrC composite. When the powder mixtures of Zr/B/C = 4/2/3–6/10/1 in molar ratio were mechanically activated (MA) by ball milling for 45–60 min and then exposed to air, they self-ignited spontaneously and the self-propagating high-temperature synthesis (SHS) was occurred to form ZrB2 and ZrC. The ZrB2–ZrC composites were produced from these MA-SHS powders by spark plasma sintering (SPS) at 1800 °C for 5–10 min and showed the fine and homogeneous microstructure composed of the <5 μm-sized grains. The mechanical properties of the composites evaluated by Vickers indentation method showed the values of Vickers hardness of 13.6–17.8 GPa and fracture toughness of 2.9–5.1 MPa·m1/2, depending on the molar ratio of ZrB2/ZrC. Thus, the better microstructure and mechanical properties of the ZrB2–ZrC composites were obtained from the MA-SHS powder mixtures, compared with those obtained from the MA powder, the mixing powder and the commercial powder mixtures.

Keywords

Fracture Toughness Powder Mixture Spark Plasma Sinter Vickers Hardness Homogeneous Microstructure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The authors gratefully acknowledge support for this research by a Grant-in Aid for Scientific Research (C) (KAKENHI 14550797)) and by Nippon Sheet Glass Foundation for Materials and Engineering, and also the help received from Dr. K. Kurokawa with SPS experiments.

References

  1. 1.
    Johnson WB, Nagelberg AS, Breval E (1991) J Am Ceram Soc 74(9):2093CrossRefGoogle Scholar
  2. 2.
    Breval E, Johnson WB (1992) J Am Ceram Soc 75(8):2139CrossRefGoogle Scholar
  3. 3.
    Shim SH, Niihara K, Auh KH, Shim B (2002) J Microscopy 205(3):238CrossRefGoogle Scholar
  4. 4.
    Kuwabara K, (2002) Ceram Jpn 37(4):267Google Scholar
  5. 5.
    Niihara K, (1991) J Ceram Soc Jpn 99(10):974CrossRefGoogle Scholar
  6. 6.
    Tsuchida T, Hasegawa T, Inagaki M (1994) J Am Ceram Soc 77(12):3227CrossRefGoogle Scholar
  7. 7.
    Tsuchida T, Kitagawa T, Inagaki M, (1995) Eur J Solid State Inorg Chem 32:629Google Scholar
  8. 8.
    Tsuchida T, Hasegawa T, (1996) Thermochim Acta 276:123CrossRefGoogle Scholar
  9. 9.
    Tsuchida T, Hasegawa T, Kitagawa T, Inagaki M (1997) J Eur Ceram Soc 17:1793CrossRefGoogle Scholar
  10. 10.
    Tsuchida T, Kitagawa T, Inagaki M (1997) J Mater Sci 32:5123CrossRefGoogle Scholar
  11. 11.
    Tsuchida T, Kawaguchi M, Kodaira K (1997) Solid State Ionics 101–103:149Google Scholar
  12. 12.
    Tsuchida T, Azuma Y (1997) J Mater Chem 7(11):2265CrossRefGoogle Scholar
  13. 13.
    Tsuchida T, Kan T (1999) J Eur Ceram Soc 19:1795CrossRefGoogle Scholar
  14. 14.
    Tsuchida T, Yamamoto S (2004) J Eur Ceram Soc 24:45CrossRefGoogle Scholar
  15. 15.
    Tokita M (1993) J Soc Powder Technol Jpn 30:790CrossRefGoogle Scholar
  16. 16.
    Shen Z, Johnsson M, Zhao Z, Nygren M (2002) J Am Ceram Soc 85:1921CrossRefGoogle Scholar
  17. 17.
    Japanese Industrial Standard No. JIS R 1607, Testing methods for fracture toughness of fine ceramics, 1995, p 1Google Scholar
  18. 18.
    Krell A, Blank P (1995) J Am Ceram Soc 78(4):1118CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Division of Materials Science and Engineering, Graduate School of EngineeringHokkaido UniversitySapporoJapan

Personalised recommendations