Synthesis of Bulk Nanostructured DO₂₂ Superlattice of Ni₃(Mo, Nb) with High Strength, High Ductility, and High Thermal Stability

Figure 4

Dark-field TEM images showing effect of aging time at 700°C on the morphology of one variant of the DO₂₂ superlattice. (a) 24 hours of aging; the inset is a section of corresponding <100> diffraction pattern showing the superlattice reflection used to form the image as indicated by the arrow. (b) 100 hours of aging.

(a)

(b)