Dynamic mechanical relaxation behavior of (La0.7Ce0.3)65Al10Co25 bulk metallic glass was studied by using dynamic mechanical analysis (DMA). The experimental results demonstrated that (La0.7Ce0.3)65Al10Co25 bulk metallic glass displays a pronounced slow β relaxation. Influence of the physical aging and heat treatment on the internal friction of the metallic glass were also analyzed. Physical aging

The deformation behaviour of a metastable β Ti-10V-2Fe-3Al (wt%) alloy containing ~10 vol% α phase was investigated via single-peak fitting and Rietveld refinement of in-situ neutron diffraction data collected during uniaxial tension. The formation of the 021α″ fibre is related to martensite variant selection during β → α″ transformation under applied load. The β lattice parameter increases by ~0.08%

In the current study, we explored the influence of structural, morphological, and magnetic properties of diamagnetic aluminum (Al3+) ions substituted nickel-zinc-cobalt (Ni-Zn-Co) spinel ferrites synthesized by the conventional ceramic technique. Single-phase cubic spinel structures with the Fd3m space group of Ni0.4Zn0.35Co0.25Fe(2‐x)AlxO4 (0 ≤ x ≤ 0.12) ferrites were confirmed by the Rietveld refinement

The present work aims to highlight the enhanced dielectric permittivity and electronic properties of GO-based ZnO, CuO and Ag2O mixed ternary nanostructured composite developed by simple sol-gel based hetero-selection synthesis approach. The significant dielectric properties is observed for GO/ZnO@Ag2O nanostructured composite with the dielectric constant ε′ between 5 × 102 up to 3.1 × 104 with the

Bimetallic alloy nanoparticles (NPs) exhibit superior catalytic and chemical storage properties relative to the monometallic NPs. Previously, it has been reported that bimetallic AgRh forms solid-solution alloy NPs that have unusual hydrogen storage properties not commonly observed in individual Ag and Rh NPs. Here, we use a combination of X-ray diffraction (XRD) and X-ray absorption fine structure

We studied the influence of surface pinning on the domain structure and magnetization dynamics in permalloy stripe domain films. The effect of the pinning in the film was controlled by introducing the defects via the interface roughness of the silicon substrate. The results show that the pinning, induced by these defects, leads to the irregularity of the stripe domain and change of their local distributions

The A15-type conventional superconductor Nb3Al alloys have been widely studied because of their high-performance superconductivity, which is generally considered a β-W3O-type structure with space group Pm3̅n at ambient pressure. In this study, four new crystalline phases of Nb3Al with space groups C2/m, I4/mmm, Pmmm and Pm3̅m were predicted using the particle swarm optimisation method. The mechanical

Lead-free perovskite-structured single-phase Na0.5Bi0.5TiO3 (NBT) thin films were successfully prepared by a sol-gel technology. The films exhibited a leakage current density of about 3.1 × 10-3 A/cm2 under an electric field of 500 kV/cm and their characteristic breakdown strength was 1250.49 kV/cm. At a frequency of 1 kHz, the dielectric constant and dielectric loss of the NBT films were 405 and 0

Metal ion capacitors (MICs) are a new type of hybrid electrochemical energy storage (EES) device, comprising of a battery-type electrode and supercapacitor-type electrode, and with integrated the advantages of batteries and supercapacitors (high energy density, high power density, and long lifespan), making it an advanced energy storage device with commercial application prospects. However, the practical

In the present work, the deformation mechanisms of face-centred cubic (fcc) Fe–C single crystal with nanovoid containing hydrogen at various contents are investigated by molecular dynamics (MD) tensile simulations. The microstructural evolution of the supercell without H reveals that the plastic deformation mechanism is fcc→bcc→hcp continuous martensitic transformation. For the supercell containing

Indium selenide (In2Se3) has got much recent attraction in a variety of research areas mainly due to its multiphase structure. Many existing studies, however, have focused on growth of α and β phase, while chemical vapor deposition (CVD) growth of the γ-phase has only been achieved for micon-thick flakes with the assistance of iodine trichloride (ICl3) catalysts. Here, we present the “catalyst-free”

Unravelling the surface physical and chemical properties, especially the surface activity of Pu-oxides (PuO2, α-Pu2O3) toward molecules, is essential to the long-term storage and surface reaction of Pu. Within DFT+U-D3 scheme, we systematically investigate the adsorption behaviors of H2O and CO2 on α-Pu2O3(111) surface, and clarify the different chemical activity of α-Pu2O3(111) surface from PuO2(111)

Soft magnets are extensively deployed in rotating electric machines. Accelerated development of new high Curie temperature, mechanically strong, magnetically soft magnets is urgently needed for next generation rotating electrical machines. The ternary Fe-Co-Ni alloy system was investigated. Spark plasma sintering (SPS) was employed to process compositionally graded (Ni-21Fe)-xCo samples. A combinatorial

With wearable smart textiles playing an increasingly important role in people’s life, aramid fiber (AF) stands out among high-performance materials due to its outstanding flexibility, high strength, and impact resistance. However, its excellent insulation makes it unable to sense and respond to external stimuli, which seems to be a call to multiwalled carbon nanotubes (MWCNTs) with high conductivity

With the booming of flexible and wearable electronic devices, demands for compatible power supply devices with high energy density and safety, excellent flexibility for superior comfort, as well as compact structure to drive these wearable electronic devices are increased rapidly. Rechargeable solid-state flexible Zn-air battery (F-ZAB) is considered as one of the most competitive and promising energy

2D composite nanomaterials of insulating boron nitride (BN) and semiconductor molybdenum disulfide (MoS2)-based flexible threshold switching selectors (Ag/BN+MoS2/Ag based on BM1 and BM2) are fabricated. Both selectors shown excellent bidirectional threshold switching characteristics. The assembled 1S1R unit comprising Ag/BN+MoS2/Ag based on BM1 selector and bipolar rewritable Ag/ZnO/Ag resistive switching

A layered perovskite structure K0.5Na0.5NbO3Bi4−xPrxTi3O12 lead-free relaxation ferroelectric capacitor was fabricated by inserting piezoelectric K0.5Na0.5NbO3 unit into Bi4Ti3O12 matrix. Pr element doping induced lattice distortion assists the matching between inserting unit and matrix. K0.5Na0.5NbO3Bi2.6Pr1.4TiO12 capacitor has aroused the large energy storage density (Ure) 69.7 J/cm3 and high efficiency

The silver microspheres with controllable morphology and structure were prepared by electroless plating with activated PS microspheres as template, which were used to construct a 3D absorbing hybrids of Ag@MWCNTs. The SEM and EDS results illustrated that a uniform silver shell was coated on the surface of PS microsphere because of the activation, which was conductive to construct an excellent conductive

The intermetallics of U(Mn1−xCux)2Ge2 (0.0 ≤x≤ 0.2) were synthesised and their magnetic properties and crystal structure were investigated by means of dc magnetization and Neutron Diffraction (ND) measurements. With Cu doping up to x = 0.2, the crystal structure remains the same in tetragonal structure with space group (I4∕mmm). Rietveld refinement of the room temperature ND data suggests that the

Magnetolpumbite nanoparticles of Cr-doped strontium hexaferrites (SrFe12-xCrxO19 x= 0.0-1.0) were synthesized by using sol-gel method. X-Ray diffraction (XRD) pattern of the prepared samples showed hexagonal structure, however in some composition hematite phase α-Fe2O3 was also observed. The average crystallite size was found to be in the range of 31-42 nm. By using Williamson-Hall (W-H) Analysis the

Copper oxide (CuO) nanosheets (NS) produced by the microwave chemical assisted route were reported to have attractive structural and thermoelectric (TE) properties. They possess the non-agglomeration property and have two-dimensional (2D) ultra-thin NS with a high Seebeck coefficient and relatively elevated electrical conductivity. This study controlled nanostructuring of CuO NS via aluminum (Al) doping

The fine-tuning of magnetic parameters and the identification of different magnetic phases are essential for the effective utilization of magnetic nanoparticles. In this work, we aim at controlling the magnetic parameters of Mg0.5Zn0.5Fe2O4 nanoparticles by varying the particle size and to determine magnetic phases using three analytical techniques having different operating time scales: VSM, ESR,

The structural stability of LiCoO2 at high voltage is a crucial concern of LiCoO2 electrode. The experiment in this work have proved that mixed LiCoO2 and LiFePO4 electrode can stabilize the layered structure of LiCoO2 and improve their cycle stability significantly. The SEM images show that a protective thin film was gradually formed on the surface of LiCoO2 particles during charging and discharging

The experimental isothermal kinetic curves for Fe48Co32P14B6 glass measured in the temperature range 683–714 K have been analyzed with using the analytical equation derived as a combination of the integral form of Kolmogorov’s equation of mass crystallization kinetics and the Kashchiev’s transient nucleation model. The transient nucleation rates show the trend to the steady-state values with increasing

The high-pressure phase behavior of the Bi–Sb system was investigated experimentally and modeled thermodynamically to study the effect of the transition to the incommensurate Bi-III type structure, which is adopted by the high-pressure phases Bi-III and Sb-II of the pure elements. The thermodynamic model of the Bi–Sb phase diagram including the effect of pressure in the isomorphous regime was extended

The temperature effect on deformation behavior, microstructural evolution and fracture mechanism of Inconel 625 superalloy sheet were systematically investigated in a wide temperature range from room temperature (RT) to 950 °C. Tensile temperature was varied in increments of 50 °C after reaching 500 °C. Obvious serrations occurred at the medium temperature range and evolved in the sequence of B→B+C→C

Thermal Annealing is a simple and powerful tool to improve the crystallinity in general or promote the functionality for peculiar purposes, ultimately leading to metastable states with lower energy. We report the annealing effect focusing primarily on the structural and magnetic properties of two different Mn3Ga thin films. One is the D022 tetragonal ferrimagnetic phase Mn3Ga, and the other is the

Successful synthesis of novel multi-component metal composites with a unique structure can effectively promote the electrochemical performance improvement of supercapacitors. Herein, three-dimensional (3D) ZnCo2O4@NiCoMn-S(denoted as ZnCo2O4@NxCyMzS-X, x, y and z refer to the element content ratio, X refers to the number of cycles) arrays growing on nickel foam (NF) were synthesized with facile hydrothermal

Due to its abundance and ecological friendliness, alpha-manganese dioxide (α-MnO2) is recognized as a cost-effective bifunctional electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). The α-MnO2 is widely used in rechargeable zinc-air batteries (ZABs). However, its performance gradually deteriorates upon charge-discharge cycling. Thus, its deactivation mechanisms