The effect of Si3N4 particulates on the thermal expansion coefficient
(CTE) of MoSi2 was investigated. It was observed that as the volume pe
rcent of Si3N4 increases, the CTE of the MoSi2-Si3N4 composites decrea
ses. In the temperature range 1000-1500 degrees C, typical of that req
uired for glass melting, about 30-35 vol% Si3N4 particulates are neede
d in the MoSi2-Si3N4 composites such that the CTE of the composite mat
ches the CTE of Mo.