A5031257115- Metallic Glasses and Amorphous Alloys
- Advanced materials and composites
- Hydrogen Storage and Materials
- Phase-change materials and chalcogenides
- Advanced ceramic materials synthesis
- Glass properties and applications
- Ammonia Synthesis and Nitrogen Reduction
- Metal and Thin Film Mechanics
- Aluminum Alloys Composites Properties
- Intermetallics and Advanced Alloy Properties
- Hybrid Renewable Energy Systems
- High-Temperature Coating Behaviors
- Quasicrystal Structures and Properties
- MXene and MAX Phase Materials
- Superconductivity in MgB2 and Alloys
- Material Dynamics and Properties
- Magnetic Properties of Alloys
- Magnesium Alloys: Properties and Applications
- Spacecraft and Cryogenic Technologies
- High Entropy Alloys Studies
- Metallurgical and Alloy Processes
- Nuclear Materials and Properties
- Microstructure and mechanical properties
- Diamond and Carbon-based Materials Research
- Material Properties and Applications
Kuwait Institute for Scientific Research
2014-2022
Al-Azhar University
1999-2012
Japan Science and Technology Agency
2003-2006
Nippon Steel (Japan)
2001
Tohoku University
1990-1997
Al-Azhar University
1995-1997
Institute for Materials Research, Tohoku University
1996
Abstract One practical solution for utilizing hydrogen in vehicles with proton-exchange fuel cells membranes is storing metal hydrides nanocrystalline powders. According to its high capacity and low cost of production, magnesium hydride (MgH 2 ) a desired storage system. Its slow hydrogenation/dehydrogenation kinetics thermal stability are the major barriers restricting usage real applications. Amongst several methods used enhancing behaviors MgH powders, mechanically milling powders one or...
We have found that a cyclic crystalline–amorphous phase transformation can occur in Co75Ti25 alloy powder when subjected to ball milling. The results shown single amorphous of is obtained after 11 ks mechanical alloying (MA) time. This transforms into new metastable bcc-Co3Ti upon milling for 86 ks. thermally stable and does not transform any other phase(s) heating up 1300 K. It however returns the same 360 Further leads formation crystalline and/or phases depending on MA
Because of its low density, storage hydrogen in the gaseous and liquids states possess technical economic challenges. One practical solution for utilizing vehicles with proton-exchange fuel cells membranes is storing metal hydrides. Magnesium hydride (MgH2) remains best material due to high capacity cost production. Due activation energy poor sorption/desorption kinetics at moderate temperatures, pure form MgH2 usually mechanically treated by high-energy ball mills catalyzed different types...
Storing hydrogen gas into cylinders under high pressure of 350 bar is not safe and still needs many intensive studies dedic ated for tank's manufacturing. Liquid faces also severe practical difficulties due to its very low density, leading larger fuel tanks three times than traditional gasoline tank. Moreover, converting liquid phase an economic process since it consumes energy needed cool down the temperature -252.8 °C. One solution storing in metal lattice such as Mg powder nanocomposites...
Differential thermal analysis, differential scanning calorimetry, optical metallography, electron microscopy, and transmission microscopy were used to study the amorphization crystallization processes of mechanically alloyed Al50Nb50 powder prepared by rod-milling technique. The results have shown that crystalline-to-amorphous transformation occurs in three stages. At intermediate stage milling, from crystalline into amorphous was conducted heating alloy 800 K. This has occurred due a...