Hostname: page-component-5c6d5d7d68-wp2c8 Total loading time: 0 Render date: 2024-08-25T22:53:41.688Z Has data issue: false hasContentIssue false
  • English
  • Français

In Situ Synthesis of A MoSi2/SiC Composite Using Solid State Displacement Reactions

Published online by Cambridge University Press:  15 February 2011

C. H. Henager Jr. ,
J. L. Brimhall ,
J. S. Vetrano  and
J. P. Hirth
C. H. Henager Jr.
Affiliation:
Pacific Northwest Laboratory, Battelle Blvd., Richland, WA 99352
J. L. Brimhall
Affiliation:
Pacific Northwest Laboratory, Battelle Blvd., Richland, WA 99352
J. S. Vetrano
Affiliation:
Pacific Northwest Laboratory, Battelle Blvd., Richland, WA 99352
J. P. Hirth
Affiliation:
Washington State University, Dept. of Mechanical and Materials Engr., Pullman, WA 99164
Get access

Abstract

A high-strength in situ composite of MoSi2/SiC was synthesized using a solid state displacement reaction between Mo2C and Si by blending Mo2C and Si powders and vacuum hotpressing the powders at 1350°C for 2 h followed by 1 h at 1700°C. The resulting microstructure consisted of 1-μm diameter β-SiC particles (30 vol%) uniformly dispersed in a fine grained MoSi2 matrix. Transmission electron microscopy was used to study the fine-scale morphology and phase distribution of the composite. Evidence for a small amount of grain boundary glass phase was observed using diffuse dark field imaging. The β-SiC particles were distributed mainly on grain boundaries and triple points within the MoSi2 matrix. These findings were used to rationalize the observed mechanical property behavior.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 273: Symposium Q – Intermetallic Matrix Composites II , 1992 , 281
Copyright
Copyright © Materials Research Society 1992

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. Henager, C. H. Jr., Brimhall, J. L., and Hirth, J. P., Scripta Metall. et Mater., 26 (1992) 585–589.Google Scholar
2. Henager, C. H. Jr., Brimhall, J. L., and Hirth, J. P., Mater. Sci. and Engr, A155 (1992) in press.Google Scholar
3. Henager, C. H. Jr., Brimhall, J. L., and Hirth, J. P., Mater. Res. Soc. Symp. Proc. (1992) in press.Google Scholar
4. Haggerty, J. S. and Chiang, Y. -M., Ceram. Eng. Sci. Proc., 11[7–8], 757 (1990).CrossRefGoogle Scholar
5. Claussen, N. and Jahn, J., J. Amer. Ceram. Soc., 63, 228 (1980).Google Scholar
6. Carter, D. H., Gibbs, W. S., and Petrovic, J. J., Ceramic Materials and Components for Engines, Tennery, V. J., ed., p. 977, The American Ceramic Society, Westerville, OH (1989).Google Scholar
7. Doherty, R. D., Physical Metallurgy. 3rd edition, Cahn, R. W. and Haasen, P., eds., p. 933, North-Holland, New York (1983).Google Scholar
8. Umakoshi, Y., Sakagami, T., Hirano, T, and Yamane, T., Acta Metall. et Mater., 38, 909 (1990).CrossRefGoogle Scholar