Microstructure and Mechanical Properties of FeAl Compacts Prepared by Pulse Current Sintering of Mechanically Alloyed Powders

摘要

Fe-35 approx 50at percent Al powder mixtures as starting materials of iron and aluminum elemental powders were milled in a planetary ball mill in argon atmosphere. The structure of powders milled for above 360ks may be FeAl intermetallics with B2 structure in disordered state. The powders were consolidated using pulse current sintering in vacuum at 1273K. With increasing aluminum content, tensile strength of the compacts decreased linearly and the values were no less than those obtained in the previous studies. This result is attributed to a high degree of refinement of the microstructure for DeAl compacts prepared by pulse current sintering method of mechanically alloyed powders.