Skip to main content
SpringerLink
Log in

Sintering and characterization of Al2O3-B4C composites

  • Papers
  • Published:
Journal of Materials Science Aims and scope Submit manuscript

Abstract

The effect of B4C on the densification, microstructure and mechanical properties of pressureless sintered Al2O3-B4C composites have been studied. Sintering was performed without sintering additives with varying B4C content from 0–40 vol %. Up to 20 vol % B4C, more than 97% theoretical density was always obtained when sintered at 1850 °C for 60 min. On increasing the sintering time from 30–120 min, there was no change in density. The result of X-ray diffraction analysis showed that no reaction occurred between Al2O3 and B4C. The grain growth of Al2O3 was inhibited by B4C particles pinned at the grain boundary and the grain-boundary drag effect. The critical amount of B4C to drag the grain boundary migration effectively was believed to occur at 10 vol % B4C sintered at 1850 °C for 60 min. The maximum three-point flexural strength was found to be 550 MPa for the specimen containing 20 vol % B4C, and the maximum microhardness was 2100 kg mm−2 for 30 vol % B4C specimen.

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

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. N. Claussen, J. Amer. Ceram. Soc. 59 (1976) 49.

    Article  CAS  Google Scholar 

  2. R. P. Wahi and B. Ilschner, J. Mater. Sci. 15 (1980) 875.

    Article  CAS  Google Scholar 

  3. A. Nakahira, N. Niihara and T. Hirai, Yogyo-Kyokai-shi 94 (1986) 767.

    Article  CAS  Google Scholar 

  4. M. Lee and M. P. Borom, Adv. Ceram. Mater. 3 (1988) 38.

    Article  CAS  Google Scholar 

  5. T. N. Tiegs, Amer. Ceram. Soc. Bull. 66 (1983) 339.

    Google Scholar 

  6. S. J. Burden, J. Hong, J. W. Rue and C. L. Storomsborh, ibid. 67 (1988) 1003.

    Google Scholar 

  7. L. M. Moser, “Microstructure of Ceramics” (Akadémioi Kiadó, Budapest, 1980) p. 157.

    Google Scholar 

  8. J. C. Wurst and J. A. Nelson, J. Amer. Ceram. Soc. 53 (1972) 109.

    Article  Google Scholar 

  9. G. E. Dieter, “Mechanical Metallurgy” (McGraw-Hill, New York, 1973) p. 331.

    Google Scholar 

  10. B. R. Lann and E. R. Fuller, J. Mater. Sci. 10 (1975) 2016.

    Article  Google Scholar 

  11. K. C. Radford, ibid. 18 (1983) 669.

    Article  CAS  Google Scholar 

  12. Ryskewitsch, J. Amer. Ceram. Soc. 36 (1953) 65.

    Article  Google Scholar 

  13. W. D. Kingery, “Introduction to Ceramics” (Wiley, New York, 1976) p. 791.

    Google Scholar 

  14. R. W. Davidge, in “Mechanical Behaviour of Ceramics” (Cambridge University Press, Cambridge, 1979) p. 86.

    Google Scholar 

Download references

Author information

Author notes

  1. Choong-Hwan Jung

    Present address: Spent Fuel Storage and Disposal Technology Department, Korea Atomic Energy Research Institute, Daedukdanji, P.O. Box 7, Daejeon, Korea

Authors and Affiliations

  1. Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Cheongryang, P.O. Box 131, Seoul, Korea

    Choong-Hwan Jung & Chong-Hee Kim

Authors
  1. Choong-Hwan Jung
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Chong-Hee Kim
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Jung, CH., Kim, CH. Sintering and characterization of Al2O3-B4C composites. J Mater Sci 26, 5037–5040 (1991). https://doi.org/10.1007/BF00549888

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00549888

Keywords

Search

Navigation