Prediction and synthesis of a family of atomic laminate phases with Kagome-like and in-plane chemical ordering.

ABSTRACT: The enigma of MAX phases and their hybrids prevails. We probe transition metal (M) alloying in MAX phases for metal size, electronegativity, and electron configuration, and discover ordering in these MAX hybrids, namely, (V_2/3Zr_1/3)₂AlC and (Mo_2/3Y_1/3)₂AlC. Predictive theory and verifying materials synthesis, including a judicious choice of alloying M from groups III to VI and periods 4 and 5, indicate a potentially large family of thermodynamically stable phases, with Kagomé-like and in-plane chemical ordering, and with incorporation of elements previously not known for MAX phases, including the common Y. We propose the structure to be monoclinic C2/c. As an extension of the work, we suggest a matching

SUBMITTER: Dahlqvist M 

PROVIDER: S-EPMC5517111 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature