Articles tagged with Grain Boundary Migration
Researchers developed a Cu-Ta-Li alloy with exceptional thermal stability and mechanical strength, combining copper's conductivity with nickel-based superalloy-like properties. The alloy's nanostructure prevents grain growth, improving high-temperature performance and durability under extreme conditions.
Fadi Abdeljawad's team finds that triple junctions, where three nanocrystals meet, are key to maintaining stability and strength of materials. This discovery could lead to designing better nanocrystalline alloys for aerospace and energy industries.
Grain boundaries, common defects in polycrystalline materials, can migrate unidirectionally without a net driving force, exhibiting directionality. This phenomenon, similar to the unidirectional rotation of a Brownian ratchet, challenges traditional views on grain boundary mobility.
A team from Osaka University used electron microscopy and computer simulations to study the kinetics of microstructure formation in Fe3Al, leading to a deeper understanding of its superelastic properties. The findings could provide insights for heat treatments and applications in construction and healthcare industries.
A research team at NIMS has created a new method for measuring the movement of lithium ions along grain boundaries within solid electrolytes, identifying obstacles and their impact on battery performance. This technique may contribute to the development of higher-performance solid-state batteries.
A microscopic crack in platinum grew and then 'healed' itself by getting shorter after repetitive stretching, confirming Dr. Michael Demkowicz's 2013 prediction. The experiment used nanocrystalline metals with a small grain size, which allows for microstructural features to interact with cracks.
A new understanding of how particle shape controls grain flow can help engineers plan for downstream impacts of restoring a river or removing a dam. The MIT team's better formula estimates bed load transport by considering a grain's drag and friction, rather than its exact shape.
A team of researchers has identified three new turtle nesting sites in the central Red Sea, which could inform efforts to protect endangered sea turtles. The discovery was made using drone surveillance and sediment samples to identify optimal nesting conditions.
A research group at National Institutes of Natural Sciences has developed a high-speed automatic search method for the migration path of impurity atoms in materials with polycrystalline structures, enabling the investigation of collective migration and its impact on plasma confinement. This method uses molecular dynamics and parallel c...
MIT researchers discovered that under certain conditions, a cracked piece of metal can close and heal due to grain boundary migration. The mechanism, which involves disclination defects, has potential applications in designing self-healing materials for various industries.
Physicists propose new class of time machines that avoid difficulties inherent in other models. Researchers also analyze lateral vibrations to control friction and crack propagation in thin films. The horizontal Brazil nut effect is studied, showing grain migration to center or edge based on size and density.