High Entropy (HE) materials

High-Entropy materials are characterized by multiple elements (≥5) that randomly occupy the same site in a crystal lattice, forming a single crystalline structure as a homogenous compound.

In 2004, the first High-Entropy (HE) Metal Alloys were discovered and more recently this was followed by oxides, carbides, nitrides and other compounds.

We have recently started to investigate some of these materials for energy conversion applications.


Reinforcement of lightweight magnesium alloys

Magnesium is a lightweight metal, making it an attractive choice for applications where weight reduction is crucial. Magnesium-based alloys are used in industries such as aerospace, automotive, and other lightweight manufacturing sectors.

With academic partners, in the frame of France Relance program we are developing new composites based on Magnesium alloys and 2D metals carbides.

SEM micrograph of Mg based composite
SEM micrograph of Mg based composite
Mg based composite of 10 mm of diameter
Mg based composite of 10 mm of diameter
Schematic diagram detailing the different steps of the elaboration of the Ti3AlC2/AZ91 composites using powder metallurgy process (SPS)
Schematic diagram detailing the different steps of the elaboration of the Ti3AlC2/AZ91 composites using powder metallurgy process (SPS)
Fig. SEM images of the composites with different Ti3AlC2 volume fractions: (a, a’) 5%, (b, b’) 10% and (c, c’)30% in SE mode. (a’, b’, c’): Zoom out on an AZ91 powder grain boundary with a cluster of MAX micro-grains.
Fig. SEM images of the composites with different Ti3AlC2 volume fractions: (a, a’) 5%, (b, b’) 10% and (c, c’)30% in SE mode. (a’, b’, c’): Zoom out on an AZ91 powder grain boundary with a cluster of MAX micro-grains.
Mechanical properties of Ti3AlC2 /AZ91 composites compared to pure AZ91: True compressive stress-strain curves.
Mechanical properties of Ti3AlC2 /AZ91 composites compared to pure AZ91: True compressive stress-strain curves.
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