Abstract
Small additions of carbon and ZrB 2 have been introduced into an FeAl alloy in order to obtain homogeneous distributions of different dispersoid particles in the B2 matrix. The carbon additions have produced the formation of second phase particles with a complex cubic structure (perovskite). The influence of these particles on the room and high temperature yield strength of the intermetallic has been compared to that of the ZrB 2 particles. Tensile tests of these alloys have been performed between 25°C both types of particles produced a substantial increase, only the ZrB 2 particles retain much of this strength at 600°C. The much faster decrease of stregth with temperature observed in the carbon containing alloy is explained in terms of a deformation process where the perovskite particles constitute a composites material with the matrix deforming at different rates.
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