Fig. 1: Lattice parameters, hardness, microstructure and thermal stability of disordered multilayer graphene (DMGr)/Cu composites.
From: High strength and plasticity in disordered multilayer graphene reinforced copper composites
Three-dimensional distribution of lattice parameters (a) and nanoindentation results (b) for DMGr/Cu composites with different volume milling for different times. c–i Microstructure characterizations of 1.5 vol% DMGr/Cu-30 h. c High-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) image showing uniform distribution of DMGr. d Integrated differential phase-contrast (iDPC) image marked by b in (a) taken with \([1\bar{1}0]\) zone axis, showing the atomic structure. The red dashed line represents a DMGr particle with a characteristic of disordered atomic structure. e Enlargement of iDPC image in (b) marked by e near DMGr. f Enlargement of iDPC image in (b) marked by f far away from DMGr. g Electron energy loss near edge structure (ELNES) spectrum at the C-K edge for different regions, including DMGr (1), DMGr-Cu interface (2), and matrix away from DMGr (3). h Schematic map of lattice expansion and lattice strain caused by DMGr, and the magnification of DMGr is presented in Supplementary Fig. 11. i Cu atom map of a reconstructed volume of 1.5 vol% DMGr/Cu-30 h sample with iso-surfaces at 0.3 at. % C. j A reconstructed volume of a 16 vol% DMGr/Cu-60 h sample, with iso-surfaces (in black red) at 0.3 at. % C.
