A5040984864- MXene and MAX Phase Materials
- Aluminum Alloys Composites Properties
- Advanced ceramic materials synthesis
- Advanced Photocatalysis Techniques
- Copper-based nanomaterials and applications
- Intermetallics and Advanced Alloy Properties
- Optimization and Packing Problems
- Additive Manufacturing and 3D Printing Technologies
- Machine Learning and ELM
- Electron and X-Ray Spectroscopy Techniques
- Advanced materials and composites
- Advanced Materials and Mechanics
- Electrocatalysts for Energy Conversion
- Transition Metal Oxide Nanomaterials
- Advanced battery technologies research
Helmholtz-Zentrum Berlin für Materialien und Energie
2024-2025
Université de Poitiers
2023-2024
École Nationale Supérieure de Mécanique et d'Aérotechnique
2024
Institut Pprime
2021-2024
Centre National de la Recherche Scientifique
2024
The oxidation of MAX phases has largely been investigated, but the effect secondary and microstructure is still unclear. We report on reactive non-reactive sintering, starting powders, microstructure, phase formation, chemical composition Cr2AlC phases. grain sizes are shown to be sensitive both processing method powders. Secondary were observed mostly in reactively sintered samples as Cr7C3 AlCr2 identified, Al contents varied between 24.4 28.0 at%. Finally, behavior produced was evaluated...
High-temperature oxidation of bulk single crystal, fine and coarse grained polycrystals Cr2AlC has been performed from 800 °C to 1500 °C. In the temperature range T = [800;1400] °C, an α-Al2O3 scale with a Cr7C3 subscale are in-situ formed independently initial microstructure on top Cr2AlC. CALPHAD calculations were explain formation instead expected mixture carbides, indicating favourable driving force for formation. The kinetic study is consistent previous works activation energy about 400...
Abstract Herein, the synthesis and characterization of Co 0.66 Fe 0.34 layered double hydroxides (LDH) derived from pure vacancy‐engineered V 2 CT x MXenes their use as electrocatalysts for oxygen evolution reaction (OER) is reported. Two distinct MXene materials are investigated: pristine 1.8 containing 10% vanadium vacancies. Through systematic variation content (17–75 wt.%), it demonstrates that utilization significantly enhances OER activity compared to . The composite @V achieved...
Abstract Bimetallic nickel‐iron based oxides are regarded as one of the most promising catalysts for oxygen evolution reaction (OER). In this study, we show that precursor metal salts can affect OER activity resulting Ni/Fe oxide under same hydrothermal synthesis conditions. Pure sulfate, pure nitrate and mixed sulfate/nitrate were used to fabricate NiFe materials study importance choice OER. The results nature in bimetallic influence different multi‐phase form which effects
Nickel-iron layered double hydroxide (NiFe LDH) are high performance catalysts for the oxygen evolution reaction (OER) which become unstable under potential in alkaline media. According to preparation method, they can present different type of impurities at their surface. The cover picture depicts how oxidizing during OER operation leads secondary phase dissolution and a faster degradation catalyst, hindering oxygen. More details be found Research Article by Axel Zuber, Michelle P. Browne,...
Cr2AlC-20 wt% (Sn; Cu; Co; Fe; Ag) powder mixtures were hot isostatically pressed at 1000 °C for 4 h under 150 MPa to investigate the possible alloying behaviour of metals with MAX phase. The as-synthesized bulk materials further oxidized and 1200 10 dry air flux study effect on oxidation performance metallic elements did not dissolve into phase grains: they mainly acted as oxidizing agents grains, draining aluminum from it form intermetallic phases. tests resulted in formation an alumina...
MAX phases are a family of nanolayered carbides and nitrides widely studied for their unique properties cumulating those ceramics metals. Cr2AlC is considered as one the most promising phase its corrosion resistance properties. In this study, fine coarse-grained samples were respectively synthesized using spark plasma sintering hot isostatic pressing techniques. The operating parameters varied to optimize purity density end-product. Oxidation tests carried out in dry air on polycrystalline...