Fig. 1
From: High-entropy high-hardness metal carbides discovered by entropy descriptors
Schematics of high-entropy carbides predictions. a The energy distribution of different configurations of the 9 five-metal carbides: MoNbTaVWC5, HfNbTaTiZrC5, HfNbTaTiVC5, NbTaTiVWC5, HfNbTaTiWC5, HfTaTiWZrC5, HfMoTaWZrC5, HfMoTiWZrC5, and HfMoVWZrC5; spectrum is shifted so that the lowest energy configuration for each composition is at zero. The energy spectrum for each composition indicates its propensity to form the high-entropy single phase: the narrower the distribution, the more likely it is to form a high-entropy single phase at finite T. b The X-ray diffraction patterns for the same 9 five-metal carbides, where the first six compositions exhibit only the desired fcc structure peaks, whereas the additional peaks for remaining three compositions indicate the presence of secondary phases. The small peaks at 2θ = 31.7°, marked by the diamond symbol in the spectra of HfNbTaTiZrC5, HfNbTaTiWC5 and HfTaTiWZrC5, are from the (111) plane of a monoclinic (Hf,Zr)O2 phase that remains due to processing
