Features of a nano-twist phase in the nanolayered Ti3AlC2 MAX phase

Julien Guénolé (1, 2) , Vincent Taupin (1, 2) , Maxime Vallet (3, 4) , Wenbo Yu (5) , Antoine Guitton (1, 2)

1 LEM3 - Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux
2 Labex DAMAS
3 MSSMat - Laboratoire de mécanique des sols, structures et matériaux
4 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides
5 BJTU - Beijing Jiaotong University

Complex intermetallic materials known as MAX phases exhibit exceptional properties from both metals and ceramics, largely thanks to their nanolayered structure. With high-resolution electronic microscopy supported by atomistic modelling, we reveal in this work the formation of a nano-twist phase in the nanolayered Ti3AlC2. We evidence basal pure-twist symmetric boundaries that can be represented by either a screw dislocations networks or pair of disclinations loop.

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Mécanique des matériaux [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]

Julien Guénolé, Vincent Taupin, Maxime Vallet, Wenbo Yu, Antoine Guitton. Features of a nano-twist phase in the nanolayered Ti3AlC2 MAX phase. Scripta Materialia, 2022, 210, pp.114425. ⟨10.1016/j.scriptamat.2021.114425⟩. ⟨hal-03207521v3⟩