Figure 4

(a) A bi-crystal model to demonstrate migration of 30° <0001>-GB via molecular dynamics simulation. (b) Dislocation structures of the grain boundaries. Three dislocation loops (brown, red and blue dashed lines) with Burgers vectors b₁, b₂, and b₃ present in the GBs by every two atomic planes and three jogs (purple straight segments), J₃₁, J₂₃, and J₁₂ formed. The x-axis is along , the y-axis is along , and the x-axis is along [0001].