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Self-propagating high-temperature synthesis microalloying of MoSi2 with Nb and V

Published online by Cambridge University Press:  31 January 2011

F. Maglia
Affiliation:
Department of Physical Chemistry, and IENI/CNR, University of Pavia, Viale Taramelli 16 27100 Pavia, Italy
C. Milanese
Affiliation:
Department of Physical Chemistry, and IENI/CNR, University of Pavia, Viale Taramelli 16 27100 Pavia, Italy
U. Anselmi-Tamburini
Affiliation:
Department of Physical Chemistry, and IENI/CNR, University of Pavia, Viale Taramelli 16 27100 Pavia, Italy, and Department Chemical Engineering and Materials Science, University of California, Davis, California 95616
Z. A. Munir
Affiliation:
Department Chemical Engineering and Materials Science, University of California, Davis, California 95616
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Abstract

Microalloying of MoSi2 to form Mo(1−x)MexSi2 (Me = Nb or V) was investigated by the self-propagating high-temperature synthesis method. With alloying element contents up to 5 at.%, a homogeneous C11b solid solution was obtained. For higher contents of alloying elements, the product contained both the C11b and the hexagonal C40 phases. The relative amount of the C40 phase increases with an increase in the content of alloying metals in the starting mixture. The alloying element content in the hexagonal C40 Mo(1−x)MexSi2 phase was nearly constant at a level of about 12 at.% for all starting compositions. In contrast, the content of the alloying elements in the tetragonal phase is considerably lower (around 4 at.%) and increases slightly as the Me content in the starting mixture is increased.

Type
Articles
Copyright
Copyright © Materials Research Society 2003

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References

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