Research Article

Thermal Stability of Cryomilled Al-Mg-Er Powders

Figure 15

TEM images of the 0.5Er powders after various annealing: nanocrystalline regions after annealing at 400°C (a); the onset of abnormal grain growth at 450°C (b); grain growth at 500°C (c) with corresponding diffraction pattern (d). Nanocrystalline α-Al and MgAl2O4 are indicated by the blue and red arcs, respectively.