Simerjeet K. Gill
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View article: Grain Boundary Segregation Suppresses Local Short‐Range Ordering in Nanocrystalline High‐Entropy Alloys
Grain Boundary Segregation Suppresses Local Short‐Range Ordering in Nanocrystalline High‐Entropy Alloys Open
Multi‐principal‐element alloys like high‐entropy alloys (HEAs) have potential applications in many engineering fields due to their unique mechanical/functional properties. While HEAs are generally considered random solid solutions, recent …
X‐Ray Absorption Studies of Local Structure of Dilute Ionic Species in Molten Salts Open
Molten salts are crucial materials with exceptional properties that make them suitable for applications such as heat transfer media, coolants, and liquid fuels in molten salt nuclear reactors and the concentrated solar power industry. Unde…
Correlative analysis of Ni( <span>ii</span> ) coordination states in molten salts using a combination of X-ray and optical spectroscopies and simulations Open
A multi-modal approach combining in situ X-ray absorption spectroscopy, optical spectroscopy, and ab initio molecular dynamics simulations was used to investigate and understand nickel metal speciation in molten salt systems.
View article: Electron Radiation-Induced Nickel Nanoparticle Formation in KCl-ZnCl<sub>2</sub> Eutectic Molten Salt Using X-ray Absorption Spectroscopy
Electron Radiation-Induced Nickel Nanoparticle Formation in KCl-ZnCl<sub>2</sub> Eutectic Molten Salt Using X-ray Absorption Spectroscopy Open
Understanding the speciation and local structure of metal solutes in molten salts is essential for predicting thermal properties and the redox and corrosion potentials of molten salts for next-generation nuclear reactors and concentrated s…
View article: Design and Development of Stable Nanocrystalline High‐Entropy Alloy: Coupling Self‐Stabilization and Solute Grain Boundary Segregation Effects
Design and Development of Stable Nanocrystalline High‐Entropy Alloy: Coupling Self‐Stabilization and Solute Grain Boundary Segregation Effects Open
Grain growth is prevalent in nanocrystalline (NC) materials at low homologous temperatures. Solute element addition is used to offset excess energy that drives coarsening at grain boundaries (GBs), albeit mostly for simple binary alloys. T…
View article: Effect of Remnant Carbon and Etching of Particles on Pyrolysis Bonded Silicon Carbide (PBSC)
Effect of Remnant Carbon and Etching of Particles on Pyrolysis Bonded Silicon Carbide (PBSC) Open
Silicon carbide (SiC) formed through pyrolysis of preceramic polymers loaded with SiC particles has gained significant attention for applications such as coatings, composite matrix modifications, and most importantly additive manufacturing…
View article: Three-dimensional strain imaging of irradiated chromium using multi-reflection Bragg coherent diffraction
Three-dimensional strain imaging of irradiated chromium using multi-reflection Bragg coherent diffraction Open
Radiation-induced materials degradation is a key concern in limiting the performance of nuclear materials. The formation of nanoscale void and gas bubble superlattices in metals and alloys under radiation environments can effectively mitig…
View article: Unraveling the Early-Stage Ordering of Krypton Solid Bubbles in Molybdenum: A Multimodal Study
Unraveling the Early-Stage Ordering of Krypton Solid Bubbles in Molybdenum: A Multimodal Study Open
Self-organization of defects such as fission gas bubbles in materials can lead to high inventory capacity for fission gas storage and help mitigate swelling caused by fission gases in nuclear fuel materials under radiation in nuclear react…
A Holistic Approach for Elucidating Local Structure, Dynamics, and Speciation in Molten Salts with High Structural Disorder Open
To examine ion solvation, exchange, and speciation for minority components in molten salts (MS) typically found as corrosion products, we propose a multimodal approach combining extended X-ray absorption fine structure (EXAFS) spectroscopy…
X-ray scattering reveals ion clustering of dilute chromium species in molten chloride medium Open
Ion clustering of dilute chromium species was unexpectedly revealed in a high-temperature molten chloride salt, challenging several long-held assumptions regarding specific ionic interactions and transport in molten ionic media.
Radiation-Assisted Formation of Metal Nanoparticles in Molten Salts Open
Knowledge of structural and thermal properties of molten salts is crucial for understanding and predicting their stability in many applications such as thermal energy storage and nuclear energy systems. Probing the behavior of metal contam…
Connections between the Speciation and Solubility of Ni(II) and Co(II) in Molten ZnCl<sub>2</sub> Open
Understanding the factors that control solubility and speciation of metal ions in molten salts is key for their successful use in molten salt reactors and electrorefining. Here, we employ X-ray and optical absorption spectroscopies and mol…
Structure and dynamics of the molten alkali-chloride salts from an X-ray, simulation, and rate theory perspective Open
Molten salts are of great interest as alternative solvents, electrolytes, and heat transfer fluids in many emerging technologies.