Effects of B, Zr and Si on Microdefects in FeAl Alloys

The long-range ordered intermetallic compounds FeAl alloys with B2 crystalstructure are characterized by superior high-temperature strength, excellent oxidation re-sistance, low density and low cost, so that they are available for the futurehigh-emperature structure materials. But the room temperature brittleness of FeAl al-loys has been the major obstacle for its engineering applications. The binary FeAl withmore than 40 at.% Al content showed mainly intergranular fracture. The cohesions of