Skip to main content
SpringerLink
Log in

The effect of Nb and W alloying additions to the thermal expansion anisotropy and elastic properties of Mo5Si3

  • Published:
Metallurgical and Materials Transactions A Aims and scope Submit manuscript

Abstract

The directional thermal expansion and elastic properties of Mo5Si3, (Mo0.8Nb0.2)5Si3, and (Mo0.85W0.15)5Si3 have been studied as a function of temperature through the use of single crystals. Thermal expansion anisotropy was reduced by Nb and W alloying. The decrease in thermal expansion anisotropy by Nb alloying was only found to occur at low temperatures, and thermal expansion anisotropy of (Mo0.8Nb0.2)5Si3 was similar to that for the other two compounds at 800 °C. Values for the polycrystalline Young’s, bulk, and shear moduli calculated from the measured single-crystal elastic constants are reduced by Nb alloying, and increased by W alloying at all temperatures studied. The elastic modulus E was calculated for the orientations between [100]-[001] and [100]-[010]. In contrast to the effects of Nb on thermal expansion anisotropy, Nb alloying increased the E [001]/E [100] elastic anisotropy.

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. M. Akinc, M.K. Meyer, M.J. Kramer, A.J. Thom, J.J. Huebsch, and B. Cook: Mater. Sci. Eng. A, 1999, vol. 261, pp. 16–23.

    Article  Google Scholar 

  2. J.H. Schneibel, C.J. Rawn, T.R. Watkins, and E.A. Payzant: Phys. Rev. B, 2002, vol. 65, art. no. 134112.

  3. F. Chu, D.J. Thoma, K. McClellan, P. Peralta, and Y. He: Intermetallics, 1999, vol. 7, pp. 611–20.

    Article  CAS  Google Scholar 

  4. C.L. Fu and Xindong Wang: Phil. Mag. Let., 2000. vol. 80, pp. 683–90.

    Article  CAS  Google Scholar 

  5. C.L. Fu and J.H. Schneibel: Acta Mater., 2003, vol. 51, pp. 5083–92.

    Article  CAS  Google Scholar 

  6. K. Ito, K. Ihara, K. Tanaka, M. Fujikura, and M. Yamaguchi: Intermetallics, 2001, vol. 9, pp. 591–602.

    Article  CAS  Google Scholar 

  7. K. Tanaka, H. Onome, H. Inui, M. Yamaguchi, and M. Koiwa: Mater. Sci. Eng. A, 1997, vols. 239–240, pp. 188–94.

    Google Scholar 

  8. JCPDS pattern no. 16-0261.

Download references

Author information

Authors and Affiliations

  1. the Department of Materials Science and Engineering, Kyoto University, 606-8501, Kyoto, Japan

    Taisuke Hayashi (Student), Misako Takamoto (Student) & Kazuhiro Ito (Associate Professor)

  2. the Department of Advanced Materials Science Faculty of Engineering, Kagawa University, 761-0396, Takamatsu, Japan

    Katsushi Tanaka (Associate Professor)

Authors
  1. Taisuke Hayashi
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Misako Takamoto
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Kazuhiro Ito
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Katsushi Tanaka
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

This article is based on a presentation made in the symposium entitled “Beyond Nickel-Base Superalloys,” which took place March 14–18, 2004, at the TMS Spring meeting in Charlotte, NC, under the auspices of the SMD-Corrosion and Environmental Effects Committee, the SMD-High Temperature Alloys Committee, the SMD-Mechanical Behavior of Materials Committee, and the SMD-Refractory Metals Committee.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Hayashi, T., Takamoto, M., Ito, K. et al. The effect of Nb and W alloying additions to the thermal expansion anisotropy and elastic properties of Mo5Si3 . Metall Mater Trans A 36, 533–538 (2005). https://doi.org/10.1007/s11661-005-0167-3

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11661-005-0167-3

Keywords

Search

Navigation