A5090651808- Metallic Glasses and Amorphous Alloys
- Glass properties and applications
- Material Dynamics and Properties
- Phase-change materials and chalcogenides
- Electric Motor Design and Analysis
- High Entropy Alloys Studies
- Theoretical and Computational Physics
- Magnetic Bearings and Levitation Dynamics
- Magnetic Properties and Applications
- Magnetic properties of thin films
- High-Temperature Coating Behaviors
- nanoparticles nucleation surface interactions
- High-pressure geophysics and materials
- Magnetic Properties of Alloys
- ZnO doping and properties
- Sensorless Control of Electric Motors
- Metal and Thin Film Mechanics
- Magnetic Properties and Synthesis of Ferrites
- Microstructure and mechanical properties
- Thermodynamic and Structural Properties of Metals and Alloys
- Boron and Carbon Nanomaterials Research
- Iron oxide chemistry and applications
- Quasicrystal Structures and Properties
- Advanced materials and composites
- Electromagnetic wave absorption materials
Jiangnan University
2008-2025
Fuzhou University
2023-2025
Wuhan Institute of Technology
2025
Zhejiang University
2015-2024
Institute of New Materials
2014-2023
State Key Laboratory of Silicon Materials
2012-2023
Yixing People's Hospital
2023
Jiangsu University
2023
Foton Motors (China)
2022
Sichuan University
2022
This paper proposes a novel in-wheel motor, which artfully integrates magnetic gear into permanent-magnet brushless (PMBL) DC motor so that they can share common PM rotor, hence offering both high efficiency and power density. Moreover, the low-speed requirement for direct driving high-speed compact design be achieved simultaneously. A 2-kW 600/4400-rpm magnetic-geared outer-rotor PMBL is designed analyzed, particularly suitable battery-powered electric motorcycles
Ferromagnetic zinc ferrite nanocrystals at ambient temperature were synthesized via the thermal decomposition of metal−surfactant complexes. Characterization measurements including transmission electron microscopy and X-ray diffraction performed for as-synthesized ZnFe2O4 particles. The sample has a relatively narrow size distribution with an average particle 9.8 ± 0.2 nm standard deviation 30%. are superparamagnetic room blocking TB = 68 2 K saturation magnetization MS 65.4 emu·g-1 T 10 K,...
Geometries, electronic structures, and magnetic properties of transition metal $M$ adatom dimer adsorbed graphene have been studied ($M=\text{Fe}$, Co, Ni, Cu). With adsorption, we confirm the previously reported stable adsorption site, adatoms are chemically bonded with except copper adatom. observed that configurations dependent on exchange-correlation functional for iron nickel dimer; while do not depend cobalt dimer. The energy indicates can barrierlessly diffuse along C-C bonds. or...
Topological insulators (TIs) are a new type of electronic materials in which the nontrivial insulating bulk band topology governs conducting boundary states with embedded spin-momentum locking. Such edge more robust two-dimensional (2D) TI against scattering by nonmagnetic impurities than its three-dimensional (3D) variant, because 2D two helical protected from only possible backscattering. This makes family better candidate for coherent spin transport and related applications. While several...
We present a precipitation-strengthening strategy to produce strong and ductile alloy at broad range of temperatures.
This paper proposes a new outer-rotor permanent-magnet (PM) vernier machine for direct-drive wind power generation, which can offer low-speed operation to directly capture power, and enable high-speed rotating field design maximize the density. Compared with its mechanical gear counterpart, proposed eliminate wear tear as well transmission loss, thus improving generation reliability efficiency. The key is newly introduce flux-modulation poles effectively modulate of armature windings PM...
First-principles calculations are performed to study the geometry, electronic structure and magnetic properties of light non-metallic atom-doped graphene (B, N, O F). The planar quasi-linear energy dispersion near Dirac point remain through doping with B N atoms, by which p-type n-type respectively induced. A bandgap about 0.5 eV is generated doping, geometrically atom also in plane. No moment detected B- , N- O-doped graphene. For F bonds one carbon atoms close vacancy, other two undergoing...
The structural evolution and magnetic properties of nanostructured copper ferrite, CuFe2O4, have been investigated by x-ray diffraction, Mössbauer spectroscopy, magnetization measurements. Nanometre-sized CuFe2O4 particles with a partially inverted spinel structure were synthesized high-energy ball milling in an open container grain sizes ranging from 9 to 61 nm. Superparamagnetic relaxation effects observed milled samples at room temperature At 15 K, the average hyperfine field decreases...
An intrinsic plastic ${\mathrm{Cu}}_{45}{\mathrm{Zr}}_{46}{\mathrm{Al}}_{7}{\mathrm{Ti}}_{2}$ bulk metallic glass (BMG) with high strength and superior compressive strain of up to 32.5% was successfully fabricated by copper mold casting. The attributed a large amount randomly distributed free volume induced Ti minor alloying, which results in extensive shear band formation, branching, interaction self-healing cracks. mechanism plasticity presented here suggests that the creation BMGs...
The pressure-induced formation of a single crystal reveals the metallic glass Ce 75 Al 25 to have long-range ordering.
A new permanent-magnet (PM) hybrid brushless (PMHB) machine is proposed and implemented as the integrated starter-generator (ISG) for electric vehicles (HEVs). It has advantages of higher torque density than other PMHB machines much wider speed range PM machines. The key to tune its dc-field winding current in such a way that three major modes ISG system operation HEVs, namely, engine cranking, battery charging, boosting, can be achieved effectively. finite-element method employed simulate...
The change of bonding status, typically occurring only in chemical processes, could dramatically alter the material properties. Here, we show that a tunable breaking and forming diatomic bond can be achieved through physical means, i.e., by moderate biaxial strain, newly discovered MoN2 two-dimensional (2D) material. On basis first-principles calculations, predict as lattice parameter is increased under there exists an isostructural phase transition at which N–N distance has sudden drop,...
Magnetic behaviors of pure CeO2 nanoparticles and nanocubes have been investigated both experimentally theoretically. It is found that monodisperse with an average size 5.3 nm do show ferromagnetic behavior at ambient temperature a saturation magnetization about 5.7 memu/g coercive force 69 Oe. First-principles calculations reveal oxygen vacancies in cause spin polarization f electrons for Ce ions surrounding vacancies, resulting net magnetic moment samples. One vacancy surface can induce...
Using high-pressure synchrotron x-ray absorption spectroscopy, we observed the Ce $4f$ electron in ${\mathrm{Ce}}_{75}{\mathrm{Al}}_{25}$ metallic glass transform from its ambient localized state to an itinerant above 5 GPa. A parallel diffraction study revealed a volume collapse of about 8.6%, coinciding with delocalization. The transition started low-density below 1.5 GPa, went through continuous densification ending high-density This new type electronic polyamorphism densely packed is...
When a material is heated, generally, it dilates. Here, we find general trend that the average distance between center atom and atoms in first nearest-neighbor shell contracts for several metallic melts upon heating. Using synchrotron X-ray diffraction technique molecular dynamics simulations, elucidate this anomaly caused by redistribution of polyhedral clusters affected temperature. In melts, high-coordinated polyhedra are inclined to evolve into low-coordinated ones with increasing As...
This paper describes how an inerter-based device for structural vibration suppression can be realized using electromagnetic transducer such as a linear motor. When the motor shaft moves, difference of voltage is generated across coil. The proportional to relative velocity between its two terminals. will exert force current following Lorentz principle if circuit closed around If electronic consisting capacitor, inductance and resistance with appropriate configuration connected, resulting...
Robust elemental ferroelectricity and switchable spin-textures in air-stable Te multilayers.
We investigate Cu-Zr liquid alloys using molecular dynamics simulation and well-accepted embedded atom method potentials over a wide range of chemical composition temperature as model metallic glass-forming (GF) liquids. As with other types GF materials, the these complex liquids are characterized by "dynamic heterogeneity" in form transient polymeric clusters highly mobile atoms that composed turn atomic exhibiting string-like cooperative motion. In accordance string relaxation, an...
The issue, composition dependence of glass-forming ability (GFA) in metallic glasses (MG), has been investigated by systematic experimental measurements coupled with theoretical calculations Cu-Zr and Ni-Nb alloy systems. It is found that the atomic-level packing efficiency strongly relates to their GFA. best GFA located at largest difference solute-centered clusters between glassy crystal alloys both MG This work provides an understanding from atomic level will shed light on development new...
High‐entropy alloys (HEAs) composed of multiprincipal elements with near‐equiatomic ratio have gained numerous attention in recent years. The design concept and unique microstructure make them exhibit a wide range attractive properties, promoting suitable for most structural functional applications. HEAs four core effects: severe lattice distortion, high entropy, sluggish diffusion, cocktail effects, which are all interconnected. Among these distortion is seen as the key factor determining...