Hostname: page-component-848d4c4894-x24gv Total loading time: 0 Render date: 2024-05-10T23:01:53.411Z Has data issue: false hasContentIssue false
  • English
  • Français

The Effect of Grain Size and SiC Particulates on the Strength and Ductility of MoSi2

Published online by Cambridge University Press:  25 February 2011

Amit K. Ghosh  and
Ajoy Basu
Amit K. Ghosh
Affiliation:
Department of Materials Science & Engineering, University of Michigan, Ann Arbor, MI 48109-2136
Ajoy Basu
Affiliation:
Department of Materials Science & Engineering, University of Michigan, Ann Arbor, MI 48109-2136
Get access

Abstract

Monolithic MoSi2 and MoSi2 reinforced with SiC particulate reinforcements have been produced with widely varying grain sizes. Monotonic compression behavior of these materials has been examined in the temperature range of room temperature to 1200°C. Based on these results, the ductile-to-brittle transition temperature at low deformation rate of MoSi2 and its composite appears to be near 900°C and may decrease slightly with decreasing grain size. Tension and compression creep behavior of these materials were also studied between 1100 and 1400°C. Creep strength of the matrix decreases with decreasing grain size even in the nominally dislocation climb-glide regime. While 20 vol% SiC particulates provide a reasonable amount of creep strengthening of the fine grain MoSi2 matrix, strengthening due to coarser grain size can be significantly higher in these materials. These results parallel those on other intermetallics.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 322: Symposium F – High-Temperature Silicides and Refractory Alloys , 1993 , 215
Copyright
Copyright © Materials Research Society 1994

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

1. Aikin, R.M., Scripta Metall., 26, 1025 (1992).CrossRefGoogle Scholar
2. Petrovic, J.J. (private communication).Google Scholar
3. Maloy, S., Lewandowski, J.J., Heuer, A.H., and Petrovic, J.J., Mater, J.. Sci. and Eng., A155, 159 (1992).Google Scholar
4. Mason, D.P. and VanAken, D.C.,(Mat. Res. Soc. Symp. Proc., 273, 1992) p. 289.Google Scholar
5. Ghosh, A.K., Basu, A. and Kung, H.,(Mat. Res. Soc. Symp. Proc., 273, 1992) p. 259.CrossRefGoogle Scholar
6. Basu, A. and Ghosh, A.K. in Advanced Metal Matrix Composites for Elevated Temperatures, (ASM International Symp. Proc., Metals Park, OH, 1991) p. 41.Google Scholar
7. Maloney, M.J., DARPA Contract Report, No. N00014-87-C0862, High Temperature Materials Workshop, Wright Patterson AFB, February, 1991.Google Scholar
8. Xiao, L. and Abbaschian, R. in Advanced Metal Matrix Composites for Elevated Temperatures, (ASMGoogle Scholar
9. Sadananda, K., Feng, C.R., Jones, H., and Petrovic, J.J., J. Mater. Sci. and Eng., A155, 227 (1992).CrossRefGoogle Scholar
10. Wiederhorn, S.M., Gettings, R.J., Roberts, D.E., Osterag, C., and Petrovic, J.J., Mater. Sci. and Eng., A155 (1992).Google Scholar
11. Ghosh, A.K. and Basu, A., “Microstructural Effects on Creep Strengthening of MoSi2 Matrix Composites”, in Critical Issues in the Development of High Temperature Structural Materials edited by Stoloff, N.S., Duquette, D.J., and Giamei, A.F. (TMS, 1993).Google Scholar
12. Ashby, M.F., Chapter 3 in Strengthening Methods in Crystals, Edited by Kelly, A. and Nickolson, R.B., (Halsted Press Division, John Wiley & Sons, New York, 1971), p. 137 Google Scholar
13. Umakoshi, Y., Sennami, J. and Yamane, T., (Proc. Fall Meeting of Jap. Inst. Metals, 1990) p. 279.Google Scholar
14. Weertman, J., J. Applied Phys., 28, 362 (1957).CrossRefGoogle Scholar
15. Weertman, J. and Weertman, J.R., Physical Metallurgy, edited by Cahn, R.W. (North Holland, Amsterdam, 1965) p. 736.Google Scholar
16. Oak Ridge National Lab Report, ORNL-DWG 85-16426, 1985.Google Scholar
17. Takahashi, T. and Oikawa, H., (Mat. Res. Soc. Symp. Proc., 213, 1991) p. 721.Google Scholar
18. Cho, W., Thompson, A.W., and Williams, J.C., Met. Trans. A, 21A, 641 (1990).Google Scholar
19. Barrett, C.R., Lytton, J.L., and Sherby, O.D., Trans. of AIME, 239, 170 (1967).Google Scholar