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Communication Dans Un Congrès Année : 2023

Micro-/nano-structural defects in MAX phases

Résumé

The control of complex micro- and nano-structures is one of the most promising strategies to design materials with tailored properties. Mn+1 AXn phases, where n ranges from 1 to 3, are a group of materials composed of a transition metal M, an A-group element A, and nitrogen or carbon X. These materials exhibit a unique combination of properties derived from both ceramics (refractory, high stiffness, low density, low ductility at room temperature) and metals (high thermal and electrical conductivity, resistance to thermal shocks, low hardness, and mechanical strength), making them highly attractive for various potential applications. Furthermore, several composites of MAX phases and metals (such as Cu and Mg) enable the creation of complex microstructures for optimizing various properties, including mechanical, and hydrogen storage. However, before any industrial exploitation, it is crucial to gain a better understanding of the operating mechanisms and the related micro-/nano-structural defects. In this presentation, we will describe recent advances in understanding micro-/nano-structural defects and their links to operating mechanisms of deformation [1,2], diffusion [3], oxidation [4], and hydrogen sorption. [1] Improving embrittlement in Ti2AlC and Ti3AlC2 compounds: a composite approach for surface severe plastic deformation. A. Heinzelmeier, A. Guitton, M. Novelli, W. Yu, T. Grosdidier; JOURNAL OF ALLOYS AND COMPOUNDS, 2023, 950, 169946 [2] Experimental evidence of zonal dislocations in the Ti2AlC MAX phase. A. Mussi, A. Heinzelmeier, T. Weidner, M. Novelli, W. Yu, F. Cuvilli, T. Grosdidier, A. Guitton; MATERIALS CHARACTERIZATION, 2023, 200, 112882 [3] Frank partial dislocation in Ti2AlC induced by matrix-Cu diffusion. W. Yu, J. Guénolé, J. Ghanbaja, M. Vallet, A. Guitton; SCRIPTA MATERIALIA, 2021, 19, 34-39 [4] Features of a nano-twist phase in the nanolayered Ti3AlC2 MAX phase. J. Guénolé, V. Taupin, M. Vallet, W. Yu, A. Guitton; SCRIPTA MATERIALIA, 2022, 210, 114425
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Dates et versions

hal-04392825 , version 1 (14-01-2024)

Identifiants

  • HAL Id : hal-04392825 , version 1

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Adrien Heinzelmeier, Timmo Weidner, Thierry Grosdidier, Alexandre Mussi, Vincent Taupin, et al.. Micro-/nano-structural defects in MAX phases. IWAC09 International workshop on Advanced Ceramics, Centre Européen de la Céramique, Sep 2023, Limoges, France. ⟨hal-04392825⟩
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