Science Advances

Supplementary Materials

This PDF file includes:

  • Fig. S1. Graphene sheets produced by shear mixing.
  • Fig. S2. Microstructure of Ni/graphene particles without shear mixing or without freeze drying.
  • Fig. S3. SEM images of sintered Ni/graphene and Ni sample produced by powder metallurgy after chemical etching.
  • Fig. S4. Ni with 4 and 6 wt % graphene after sintering.
  • Fig. S5. XRD and EDS spectra of Ni/Ni3C composite and Ni produced by powder metallurgy.
  • Fig. S6. Crystal structure and FFT pattern of Ni3C particle.
  • Fig. S7. Strengthening of Ni/Ni3C composite.
  • Fig. S8. SAED patterns of the Ni matrix.
  • Fig. S9. Close-up observation of the crack initiation at the artificial notch.
  • Fig. S10. Close-up inspection of the crack propagation of the three-point bending Ni/Ni3C sample.

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