The effect of 10at%Cr addition to Fe-alloys containing 25 and 30at%Al and the influence of the thermal treatment on the defect structure of these samples were investigated by positron lifetime spectroscopy. Calculations were performed to study the influence of Cr impurities on the lifetime associated to vacancy-type defects in both the D03 and B2 phases. The results showed that Cr addition led to a decrease of positron lifetime parameters associated with an increase of the D03 order.

Influence of Cr Addition on the Defect Structure of Fe–Al Alloys. Y.Ortega, N.de Diego, F.Plazaola, J.A.Jiménez, J.del Río: Intermetallics, 2007, 15[2], 177-80