Hostname: page-component-78c5997874-m6dg7 Total loading time: 0 Render date: 2024-11-17T14:24:49.211Z Has data issue: false hasContentIssue false
  • English
  • Français

Transition Metal Alloying and Phase Stability in the Mo-Si-B System

Published online by Cambridge University Press:  11 February 2011

R. Sakidja ,
S. Kim ,
J. S. Park  and
J. H. Perepezko
R. Sakidja
Affiliation:
University of Wisconsin-Madison, Materials Science & Engineering, 1509 University Avenue, Madison, WI 53706, USA
S. Kim
Affiliation:
University of Wisconsin-Madison, Materials Science & Engineering, 1509 University Avenue, Madison, WI 53706, USA
J. S. Park
Affiliation:
University of Wisconsin-Madison, Materials Science & Engineering, 1509 University Avenue, Madison, WI 53706, USA
J. H. Perepezko
Affiliation:
University of Wisconsin-Madison, Materials Science & Engineering, 1509 University Avenue, Madison, WI 53706, USA
Get access

Abstract

The effect of transition metal substitution for Mo on the phase stability and multi-phase microstructures in the Mo-Si-B ternary system has been examined. The metal-rich portion of the ternary Mo-Si-B system at equilibrium is comprised of thermally stable BCC Mo(ss) phase, a ternary-based Mo5SiB2 (T2 phase), binary-based metal-rich silicides (Mo3Si [the A15 phase] and Mo5Si3 [the T1 phase]) and borides (Mo2B and MoB phases). Systematic alloying with selected transition metals which are substitutional in both Mo(ss) and T2 phases such as Cr, V, Nb, W, Ti and Hf, has been performed to elucidate the roles of the substitution on the stability of the three phase fields of Mo(ss) + T2 + A15 and T2+ T1 + A15. The potential of the alloying effects on the microstructure design and control of the solidification pathways is further detailed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 753: Symposium BB – Defect Properties and Related Phenomena in Intermetallic Alloys , 2002 , BB2.3
Copyright
Copyright © Materials Research Society 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Nunes, C. A., Sakidja, R. and Perepezko, J. H., in Structural Intermetallics 1997, ed. Nathal, M.V., Darolia, R., Liu, C.T., Martin, P.L., Miracle, D.B., Wagner, R. and Yamaguchi, M., (Warrendale, PA: TMS, 1997) pp. 831.Google Scholar
2. Sakidja, R., Sieber, H., Perepezko, J. H., Phil. Mag. Lett., 79, (1999), 351.Google Scholar
3. Schneibel, J. H., Liu, C. T., Easton, D. S., and Carmichael, C. A., Mat. Sci. & Engr. A, 1–2, (1999), 78.Google Scholar
4. Schneibel, J. H., Liu, C. T., Heatherly, L., and Kramer, M. J., Scripta Materilia, 38, (1998), 1169.Google Scholar
5. Meyer, M. K. and Akinc, M., J. Am. Ceram. Soc., 79, (1996), 938.Google Scholar
6. Fournelle, J. H., Donovan, J. J., Kim, S. and Perepezko, J. H., Proc. of 2nd Conf. of the IUMAS (Kailua-Kona, Hawaii, Jul. 9–13, 2000), pp. 425.Google Scholar
7. http://toycrate.xbug.org/bs/index.html Google Scholar
8. Aronsson, B., Acta Chemica Scandinavica, 12, (1958), 31.Google Scholar
9. Franceschi, E. A. and Ricaldone, F., Revue de Chimie minerale, 21, (1984), 202.Google Scholar