Miscible chemical ordering in Ti-Cr-Mo quinary system by solid solution of Mo₂Ti₂AlC₃ and Cr_2.5Ti_1.5AlC₃ o-MAXs.

ABSTRACT: Out-of-plane ordering is promising for separately adjusting the heterodesmic chemical bonding inside the MAX phase thus tuning their properties, while constructing the out-of-plane ordered-MAX (o-MAX) is still a challenge. In this work, a strategy towards o-MAX by solid solutions of two existing o-MAXs is verified, i.e., Cr_2.5Ti_1.5AlC₃ and Mo₂Ti₂AlC₃, with controllable stoichiometric ratios (1:2, 1:1, and 2:1). A miscible chemical ordering is observed in three Ti-Cr-Mo quinary MAXs, which inherits the out-of-plane ordering from both parental o-MAXs. Meanwhile, through density functional theory (DFT) calculations, the electronic structure and bonding states inside the quinary o-MAXs are analyzed. Based on the calculations, an

SUBMITTER: Du CF 

PROVIDER: S-EPMC11950389 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature