Theoretical Prediction and Synthesis of (Cr2/3Zr1/3)2AlC i‑MAX Phase

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Authors

Institutes & Expert groups

  • KUL - Katholieke Universiteit Leuven
  • Li.U - Linköping University

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DOI

Abstract

Guided by predictive theory, a new compound with chemical composition (Cr2/3Zr1/3)2AlC was synthesized by hot pressing of Cr, ZrH2, Al, and C mixtures at 1300 °C. The crystal structure is monoclinic of space group C2/c and displays in-plane chemical order in the metal layers, a so-called i-MAX phase. Quantitative chemical composition analyses confirmed that the primary phase had a (Cr2/3Zr1/3)2AlC stoichiometry, with secondary Cr2AlC, AlZrC2, and ZrC phases and a small amount of Al−Cr intermetallics. A theoretical evaluation of the (Cr2/3Zr1/3)2AlC magnetic structure was performed, indicating an antiferromagnetic ground state. Also (Cr2/3Hf1/3)2AlC, of the same structure, was predicted to be stable

Details

Original languageEnglish
Pages (from-to)6237-6244
Number of pages7
JournalInorganic Chemistry
Volume57
Issue number11
DOIs
StatePublished - 11 May 2018

Keywords

  • MAX phases, Solid solutions, X-ray diffraction, Elastic properties

ID: 5398952