Fig. 3: Calculated hardness for int-diamond.
From: Intersectional nanotwinned diamond-the hardest polycrystalline diamond by design
a Fraction of yielded grains as a function of uniaxial stress. When the fraction of yielded grains reaches 90%, the corresponding uniaxial stress is defined as yield stress σy. The inserted figure is the statistical fraction of different slip modes occurring in the yielded int-diamond grains. b The calculated hardness of int-diamond compared with ng-diamond and nt-diamond. The inserted figure is the twin-thickness-dependent hardness of int-diamond and nt-diamond calculated by the Sachs model, together with the comparison of experimental measurements data7,8. Htheo is theoretical hardness of diamond calculated by the 9τtheo, where the τtheo is the theoretical shear strength of diamond.
