1. Fig. 4 Compressive stress-strain curves and specific strength of compressed GCs.
Compressive stress-strain curves and specific strength of compressed GCs. (A) The compressed GCs exhibit high compressive strength up to 9 GPa and large axial elastic strains near 3%. The Young’s moduli E are derived from the linear stress-strain relationship before yield. The inset shows a schematic of the measurement method in the DAC. (B) The specific compressive strength of compressed GCs in comparison with available data on known ceramics, polymers, and metals (2, 3). When normalized by density, the compressed GCs are about two to four times stronger than commonly used carbon fibers, cemented diamond, cemented cubic BN, SiC, and B4C.
Meng Hu et al. Sci Adv 2017;3:e
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