A5059921322- Hydrogen Storage and Materials
- Ammonia Synthesis and Nitrogen Reduction
- Hybrid Renewable Energy Systems
- Magnesium Alloys: Properties and Applications
- Superconductivity in MgB2 and Alloys
- Nuclear Materials and Properties
- Nuclear Physics and Applications
- Magnetic Properties of Alloys
- Advanced Chemical Physics Studies
- Aluminum Alloys Composites Properties
Université du Québec à Trois-Rivières
2012-2017
Universidade Federal de São Carlos
2011-2015
Université du Québec
2013
We examined the formation of ternary complex hydride phase Mg2FeH6 during thermal hydrogen absorption a ball-milled powder mixture MgH2 and Fe. Analytical measurements, scanning transmission electron microscopy, energy-loss spectroscopy, with sample cooled to liquid nitrogen temperature, were utilized identify various phases present study features this transformation. The low-loss region spectrum was mainly used distinguish constituents. initially formed ball milling Fe, demonstrating...
In this study, we have investigated the synthesis, microstructure and hydrogen storage properties of Mg-based nanocomposites containing different concentrations TiCrV TiCr1.2V0.8 alloys. The Mg Ti-Cr-V additives were prepared by reactive milling (RM) under atmosphere. structural characterization revealed presence β-MgH2, γ-MgH2 BCC phases in powders samples after RM. addition, a very refined homogenous with average MgH2 crystallite size around 10-12 nm was observed, including nanometric...
In this study we investigated the synthesis and hydrogen storage properties of Mg2FeH6. The complex hydride was prepared by ball milling under argon atmosphere from 2Mg + Fe 2MgH2 compositions. samples were characterized X-ray powder diffraction scanning electron microcopy. Kinetics absorption desorption measured in a Sievert’s apparatus. We found that plays more important role on Mg2FeH6 than starting Ball pressure resulted smaller particles sizes doubled yield formation. Despite...
In this paper we address some aspects of the kinetics hydrogen absorption and desorption Mg2FeH6 nanocomposite powder. The material was prepared from a 2Mg-Fe composition by reactive milling under H2 pressure at room temperature. After mechano-chemical processing, mainly constituted having gravimetric capacity corresponding to 94% theoretical capacity. constant temperature transformation phases during process were studied. presented two-step behaviour. First, β-MgH2 formed with faster than...
Abstract Mg 2 FeH 6 is a promising material for hydrogen storage applications, since it presents the highest known volumetric capacity of 150 kg m −3 H and its metallic constituents are inexpensive. The major drawbacks application difficulties associated with synthesis also high thermal stability. In this paper, -based nanocomposites were prepared from elements via reactive milling. A high-yield complex hydride was obtained after systematic processing study, best conditions successfully...
The compound Mg2FeH6 was synthesized from a 2Mg-Fe mixture in single process through high-energy ball milling under hydrogen atmosphere at room temperature. complex hydride prepared Mg powder and granulated or powdered Fe using planetary mill. phase evolution during different times performed by X-rays diffraction technique. dehydrogenation behavior of the investigated simultaneous thermal analyses differential scanning calorimetry thermogravimetry coupled with mass spectrometer. use iron as...
In this communication we report the effect of macro and microstructure on hydrogen storage properties magnesium based materials. Magnesium hydride is an attractive material for applications since it has a high volumetric density. Furthermore, enthalpy formation makes thermal energy applications. Besides, abundant low cost material. However, Mg/MgH 2 system requires operating temperatures due to its thermodynamic stability slow absorption desorption kinetics. Magnesium’s first hydrogenation...