Skip to main content
SpringerLink
Log in

Addition effects of aluminum and in situ formation of alumina in MoSi2

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

Abstract

Phase composition change and mechanical properties at room temperature of MoSi2 materials with the addition of aluminum were investigated. An explanation was given to the appearance of Mo5Si3 when hot pressing MoSi2 raw powder containing oxygen. The mechanical properties including Vickers hardness, bending strength and fracture toughness were improved with the addition of aluminum up to the limit content needed for absorbing the oxygen in MoSi2 raw powder. More aluminum addition than the limit content (in this study it is 5 wt %) will result in the formation of Mo(Si ,Al)2 and Si. The in situ formed Al2O3 could act as a crack pinning element. However, because the thermal expansion coefficients of Al2O3 and MoSi2 are near and there is a strong bonding between them, the toughening effect by such in situ formed small Al2O3 particles (less than 2 μm) is limited.

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. Y. L. Jeng and E. J. Lavernia, J. Mater. Sci. 29 (1994) 2557.

    Google Scholar 

  2. J. J. Petrovic and R. E. Honnell, ibid. 25 (1990) 4453.

    Google Scholar 

  3. M. J. Maloney and R. J. Hecht, Mater. Sci. Eng. A155 (1992) 19.

    Google Scholar 

  4. T. Watanabe and K. Shobu, MRS Int'l. Mtg. on Adv. Mats. 7 (1989) 303.

    Google Scholar 

  5. K. Shobu, T. Watanabe and K. Tsuji, J. Ceram. Soc. Jpn. 97 (1989) 1311.

    Google Scholar 

  6. S. Maloy, A. H. Heuer, J. Lewandowski and J. Petrovic, J. Amer. Ceram. Soc. 74 (1991) 2704.

    Google Scholar 

  7. J. S. Idasetima and J. J. Petrovic, Philosophical Magazine A76 (1997) 271.

    Google Scholar 

  8. A. Costa e Silva and M. J. Kaufman, Scripta Metallurgica et Materialia 29 (1993) 1141.

    Google Scholar 

  9. A. G. Evans and E. A. Charles, J. Amer. Ceram. Soc. 59 (1976) 371.

    Google Scholar 

  10. C. D. Wirkue and D. R. Wilder, ibid. 49 (1966) 173.

    Google Scholar 

  11. T. C. Chou and T. G. Nieh, JOM, December (1993) 15.

  12. L. Shaw and R. Abbaschian, J. Amer. Ceram. Soc. 78 (1995) 3129.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Inorganic Composite Materials Department,, Kyushu National Industrial Research Institute,, Tosu-shi, Saga-ken, 841-0052,, Japan

    Guo-Jun Zhang, Xue-Mei Yue & Tadahiko Watanabe

Authors
  1. Guo-Jun Zhang
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Xue-Mei Yue
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Tadahiko Watanabe
    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

Zhang, GJ., Yue, XM. & Watanabe, T. Addition effects of aluminum and in situ formation of alumina in MoSi2. Journal of Materials Science 34, 997–1001 (1999). https://doi.org/10.1023/A:1004583625750

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/A:1004583625750

Keywords

Search

Navigation