Atomic occupancy, configurational entropy and thermal properties of CrxTi0.75Mo0.75V1.5−xAlC2 (IMAGE)

Tsinghua University Press

Atomic occupancy, configurational entropy and thermal properties of CrxTi0.75Mo0.75V1.5−xAlC2

Caption

Two new quaternary CrxTi0.75Mo0.75V1.5−xAlC2 (x = 1.25, 1) MAXs and Cr0.75Ti0.75Mo0.75V0.75AlC2 are synthesized by hot pressing. Interestingly, an unprecedented transition in M-site atomic occupancy from out-of-plane order to solid solution is observed along with the composition variation, which also increases the configurational entropy from medium- to high-entropy. Low thermal conductivities are detected from the three MAXs, which can be ascribed to the enhanced scattering of both electrons and phonons from the high-entropy structure.

Credit

Journal of Advanced Ceramics, Tsinghua University Press

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