Hostname: page-component-586b7cd67f-2plfb Total loading time: 0 Render date: 2024-11-29T09:24:07.196Z Has data issue: false hasContentIssue false
  • English
  • Français

Physical and Mechanical Properties of MoSi2-Er2Mo3Si4 Composites

Published online by Cambridge University Press:  01 January 1992

D. Keith Patrick  and
David C. Van Aken
D. Keith Patrick
Affiliation:
Department of Materials Science and Engineering, The University of Michigan, Ann Arbor, MI 48109-2136
David C. Van Aken
Affiliation:
Department of Materials Science and Engineering, The University of Michigan, Ann Arbor, MI 48109-2136
Get access

Abstract

A study has been conducted to determine the feasibility of using Er2Mo3Si4 as a reinforcement phase to improve the high temperature strength of MoSi2. The melting temperature of Er2Mo3Si4 was determined to be 1930 ± 20°C whereas the eutectic of Er2Mo3Si4-39 vol% MoSi2 melted at 1790 ± 10°C. Elevated temperature microhardness tests show that Er2Mo3Si4 has significantly higher hardness than MoSi2 above 1000°C, e.g. approximately 5.8 GPa versus 1.5 GPa at 1300°C, respectively. A MoSi2/ Er2Mo3Si4/20p composite was produced by ball milling and hot pressing arc-melted MoSi2-20 vol% Er2Mo3Si4 materials. At 1300°C the MoSi2/ Er2Mo3Si4/20p composite and a directionally solidified Er2Mo3Si4-MoSi2 eutectic exhibited hardnesses of 2.4 GPa and 4 GPa, respectively. Preliminary results from compressive decremental step strain rate tests at 1300°C indicate that the creep strength of the MoSi2/ Er2Mo3Si4/20p composite is comparable to that of a MoSi2/SiC/20w composite. The creep stress exponent was determined to be 3.3 at 1200°C and 3.7 at 1300°C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 1135
Copyright
Copyright © Materials Research Society 1995

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. Gibala, R., Ghosh, A.K., Van Aken, D.C., Srolovitz, D.J., Basu, A., Chang, H., Mason, D.P., and Yang, W., Mat. Sci. and Engr. A155, 147 (1992).Google Scholar
2. Maloy, S.A., Lewandowski, J.J., Heuer, A.H., and Petrovic, J.J., Mat. Sci. and Engr. A155, 159(1992).Google Scholar
3. Hardwick, D.A., Martin, P.L., and Moores, R.J., Scripta Metall. 27, 391 (1992).Google Scholar
4. Jayashankar, S. and Kaufman, M.J., Scripta Metall. 26, 1245 (1992).Google Scholar
5. Mason, D.P. and Van Aken, D.C., this proceedings.Google Scholar
6. Mason, D.P., Van Aken, D.C., and Mansfield, J.F., Intermetallic Matrix Composites II. ed. by Miracle, D.B., Anton, D.L., and Graves, J.A. (Mat. Res. Soc. Proc. vol. 273, Pittsburg, PA, 1992), pp. 289–294.Google Scholar
7. Bodak, O.I., Gorelenko, Yu. K., Yarovets, V.I., and Skolozdra, R.v., Izvestiya Akademll Nauk SSSR, Neorgan Icheskie Materialy, 20 (5), 741 (1984).Google Scholar
8. Maloy, S., Heuer, A.H., Lewandowski, J.J, and Petrovic, J.J., J. Amer. Cer. Soc. 74, 2074 (1991).Google Scholar
9. Bose, S., Mat. Sci. and Engr. A155, 217 (1992).Google Scholar
10. Sadananda, K., Feng, C.R., Jones, H., and Petrovic, J., Mat. Sci. and Engr. A155, 227 (1992).Google Scholar