Figure 4
From: Elastic and mechanical softening in boron-doped diamond
(a) Variation of hardness with shear modulus for a set of mostly experimental data presented in Table S3. An empirical non-linear correlation for materials with HV > 60 GPa is shown as a guide to the eye with HV = 14e(0.0038 G). (b) Chen’s formulation7 compared with a linear fit to B-C-N compounds with HV > 60 GPa (Table S3). Nano-scale strengthening effects, such as those observed in nanotwinned (NT) materials such as NT-cBN1 and NT-diamond2, are not plotted because their elastic moduli have not been determined.
