Fig. 5: In situ observation of the recoverable face-centered cubic (FCC)-hexagonal close-packed (HCP) phase transition and the formation of a zigzag-like nanotwin structure.
From: Chemical inhomogeneity–induced profuse nanotwinning and phase transformation in AuCu nanowires
a–f FCC–HCP phase transition occurs via partial dislocation emission on alternating close-packed (111) planes. g, h HCP phase restores to an FCC lattice via the emission of partial dislocations between the two separated SFs. i, j Nanotwins were randomly generated throughout the NW, leading to a zigzag-like nanotwin structure. The stacking faults (SFs) are denoted SF1–SF3; the nanotwins are denoted T1–T6; and the twin boundaries are marked by the red dotted lines. The scale bar is 2 nm.
