Citation

Dumont AL, Smith DS, Gault C, Bonnet JP. Ann. Chim. 1998; 23(1-2): 11-18.

Copyright

(Copyright © 1998, Masson Editeur)

DOI

10.1016/S0151-9107(98)80002-0

PMID

unavailable

Abstract

MoSi2 / Al2O3 based composites have been obtained from S.H.S. reactions between aluminum, molybdenum trioxide, and silicon or silica. The very fast reaction begins just after the melting of aluminum. The heat released raises the reaction products to a maximum temperature, T(ad), high enough to allow their partial or total melting. The control of T(ad) is achieved by the addition of some MoSi2 or Al2O3 to the starting powders. The microstructure of the final product corresponds to many suicide domains dispersed in an alumina based matrix. The suicide domains are made of MoSi2 or Mo(Si,Al)2 grains surrounded by a Mo5Si3 phase. The matrix is made of alumina grains with amorphous and/or mullite intergranular phases. T(ad) value influences the nature and the distribution of phases inside the final product.

Language: en