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Structural characterization of combustion synthesized MoSi2–Si3N4 composite powders and plasma sprayed MoSi2–Si3N4 composites

Published online by Cambridge University Press:  31 January 2011

H. Kung ,
Y. C. Lu ,
A. H. Bartlett ,
R. G. Castro ,
J. J. Petrovic  and
E. Shtessel
H. Kung
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
Y. C. Lu
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
A. H. Bartlett
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
R. G. Castro
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
J. J. Petrovic
Affiliation:
Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
E. Shtessel
Affiliation:
Exotherm Corporation, Camden, New Jersey
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Abstract

A systematic structural characterization has been conducted on combustion synthesized MoSi2–Si3N4 powders and plasma sprayed composites by transmission electron microscopy (TEM). The powders are cleaner and with little surface oxide contamination than most commercial powders. The distribution of the two phases can be tailored by modifying the synthesis conditions, which has resulted in improved retention of Si3N4 after plasma spraying. TEM studies performed on deformed composites indicate a strong link between even dispersion of second phases and enhanced dislocation plasticity in the plasma sprayed composites.

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Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 6 , June 1998 , pp. 1522 - 1529
Copyright
Copyright © Materials Research Society 1998

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References

REFERENCES

1.Petrovic, J. J., MRS Bull. XVIII, 35 (July 1993).CrossRefGoogle Scholar
2. High Temperature Structural Silicides, edited by Vasudevan, A. K. and Petrovic, J. J., Mater. Sci. Eng. A155 (1992).Google Scholar