A5088579113- Material Dynamics and Properties
- Metallic Glasses and Amorphous Alloys
- Theoretical and Computational Physics
- Glass properties and applications
- Catalytic Processes in Materials Science
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Metal-Organic Frameworks: Synthesis and Applications
- High Entropy Alloys Studies
- Nanomaterials for catalytic reactions
- Catalysis and Hydrodesulfurization Studies
- Electrocatalysts for Energy Conversion
- Phase-change materials and chalcogenides
- High-Temperature Coating Behaviors
- Liquid Crystal Research Advancements
- Copper-based nanomaterials and applications
- Advanced oxidation water treatment
- Environmental remediation with nanomaterials
- Layered Double Hydroxides Synthesis and Applications
- Mesoporous Materials and Catalysis
- Organic Chemistry Cycloaddition Reactions
- Covalent Organic Framework Applications
- Material Science and Thermodynamics
- Advanced battery technologies research
- Electrochemical Analysis and Applications
Huazhong University of Science and Technology
2016-2025
Hubei Polytechnic University
2025
Wuhan National Laboratory for Optoelectronics
2016-2024
Fujian University of Technology
2021-2024
Shandong University of Science and Technology
2021-2024
Wuhan Institute of Technology
2024
Hubei University
2024
Chongqing Academy of Environmental Science
2024
Beijing YouAn Hospital
2024
Capital Medical University
2024
Metallic glasses, combining metallic bonding and disordered atomic structures, are at the cutting edge of materials research. Recent advances in this field have revealed that many key questions glassy physics inherently connected to one important relaxation mode: so-called secondary (β) relaxation. Here, we review features β relaxations their relations other processes properties. Special emphasis is put on current roles future promise understanding glass transition phenomenon, mechanical...
The mechanisms of plastic deformation glassy solids and structural origin $\ensuremath{\beta}$ relaxation are two fundamental issues. We provide compelling experimental evidence that the activation shear transformation zones (STZs) relaxations in metallic glasses directly related, energy potential-energy barriers STZs nearly equivalent. Our results suggest an intrinsic correlation among potential STZs, relaxation, inhomogeneous atomic structure glasses, which has implications for...
We report a close correlation between the dynamic behavior of serrated flow and plasticity in metallic glasses (MGs) show that plastic deformation ductile MGs can evolve into self-organized critical state characterized by power-law distribution shear avalanches. A stick-slip model considering interaction multiple bands is presented to reveal complex scale-free intermittent shear-band motions quantitatively reproduce experimental observations. Our studies have implications for understanding...
Metallic glasses are commonly brittle, as they generally fail catastrophically under uniaxial tension. Here we show pronounced macroscopic tensile plasticity achieved in a La-based metallic glass which possesses strong $\ensuremath{\beta}$ relaxations and nanoscale heterogeneous structures. We demonstrate that the relaxation is closely correlated with activation of structural units plastic deformations global plasticity, transition from brittle to ductile tension follow similar...
Abstract Focusing on metallic glasses as model systems, we review the features and mechanisms of β-relaxations, which are intrinsic universal to supercooled liquids glasses, demonstrate their importance in understanding many crucial unresolved issues glassy physics materials science, including glass transition phenomena, mechanical properties, shear-banding dynamics deformation mechanisms, diffusion breakdown Stokes–Einstein relation well crystallization stability glasses. We illustrate that...
Abstract One important goal of the current electrocatalysis is to develop integrated electrodes from atomic level design multilevel structural engineering in simple ways and low prices. Here, a series oxygen micro‐alloyed high‐entropy alloys (O‐HEAs) developed via metallurgy approach. A (CrFeCoNi) 97 O 3 bulk O‐HEA shows exceptional electrocatalytic performance for evolution reaction (OER), reaching an overpotential as 196 mV Tafel slope 29 dec −1 , with stability longer than 120 h 1 m KOH...
Metal-organic framework (MOF) glasses are a fascinating new class of materials, yet their prosperity has been impeded by the scarcity known examples and limited vitrification methods. In work described in this report, we applied synergistic stimuli vapor hydration thermal dehydration to introduce structural disorders interpenetrated dia-net MOF, which facilitate formation stable super-cooled liquid quenched glass. The material after stimulus glass transition temperature (Tg) 560 K, far below...
In multicomponent metallic glasses, we demonstrate that diffusion and secondary (β) relaxation are closely related. The motion of the smallest constituting atoms takes place within temperature time regimes where β relaxations activated, and, in particular, two processes have similar activation energies. We suggest cooperative stringlike atomic plays an important role both processes. This finding provides additional insights into structural origin as well mechanisms diffusions glasses.
A new metallic glass, which was created by vapour deposition at an appropriately high substrate temperature, shows exceptional thermal stability, and enhanced glass transition temperature elastic modulus. Comparing this material with other organic glasses prepared similar routes known as ultrastable demonstrates the formation of glassy materials correlates to important concept fragility.
The Johari-Goldstein secondary (β) relaxations are an intrinsic feature of supercooled liquids and glasses. They crucial to many properties glassy materials, but the underlying mechanisms still not established. In a model metallic glass, we study atomic rearrangements by molecular dynamics simulations at time scales up microseconds. We find that distributions single-particle displacements exhibit multiple peaks, whose positions quantitatively match pair distribution function. These...
Glassy materials display numerous important properties which relate to the presence and intensity of secondary ($\ensuremath{\beta}$) relaxations that dominate dynamics below glass transition temperature. However, experimental protocols such as annealing allow little control over $\ensuremath{\beta}$ relaxation for most glasses. Here we report on toluene in highly stable glasses prepared by physical vapor deposition. At conditions generate highest kinetic stability, about 70% is suppressed,...
One puzzling phenomenon in glass physics is the so-called 'shadow transition' which an anomalous heat-absorbing process below real transition and influences properties. However, it has yet to be entirely characterized, let alone fundamentally understood. Conventional calorimetry detects limited heating rates. Here, with chip-based fast scanning calorimetry, we study dynamics of shadow over four orders magnitude rates for 24 different hyper-quenched metallic glasses. We present evidence that...
Finding highly efficient and reusable catalysts for advanced oxidation processes is a crucial endeavor to resolve the severe water pollution problems. Although numerous nanocatalysts have been developed in past few decades, their recyclability along with sustainably high catalytic efficiency still remain challenging. Here, we propose new strategy designing catalysts, that is, introducing Cu as reductant into metallic glass-based catalyst constructing three-dimensional hierarchical porous...
Most metallic glasses (MGs) exhibit weak evidence of slow β-relaxation in their dynamic mechanical spectroscopy spectra. In contrast to other MGs, the La-based MGs we report here show a distinct peak relaxation measurements. We find that behavior can be tuned by modification chemical composition and fragility. The structural origin correlation between α-relaxation are also discussed. with pronounced tunable properties might provide model system investigate some long-standing issues glass field.
We investigate the fast β- and Johari–Goldstein (JG) β-relaxation processes, along with elastic scattering response of glass-forming (GF) liquids boson peak, in a simulated Al–Sm GF material exhibiting fragile–strong (FS) transition. These dynamical processes are universal “ordinary” fluids collectively describe their “fast dynamics,” we find these relaxation also arise liquid FS String-like particle motion, having both an irreversible reversible nature (stringlets) component, occurs...
Abstract Even in their bulk forms, complex alloys like high-entropy (HEAs) exhibit favorable activity and stability as electrocatalysts for the oxygen evolution reaction (OER). However, underlying reasons are not yet fully understood. In a family of Mo-doped CrFeCoNi-based HEAs, we have identified three crucial factors that govern performance: (i) homogeneous solid solution phase HEAs helps to maintain high-valence states metals; (ii) surface reconstruction results hybrid material comprising...