Defects produced in massively transformed L10-ordered τ-MnAl were characterized by detailed transmission electron microscopic studies. The defect population in massive τ-MnAl comprised arrays of overlapping octahedral stacking faults, {111}-conjugated micro-twins, thermal antiphase boundaries and dislocations. The origin of these defects was traced to atomic attachment faulting on {111}- and {020}-type facets of the essentially incoherent growth interface between the parent and product phases.

Evolution of Microstructure and Defect Structure in L10-Ordered Manganese Aluminide Permanent Magnet Alloys. C.Yanar, V.Radmilovic, W.A.Soffa, J.M.K.Wiezorek: Intermetallics, 2001, 9[10-11], 949-54