By utilising the solid-state sintering route, bulk polycrystalline ex-situ MgB2 added with 0.5 mol Mg + 5.0 wt.% B4C + x wt.% Dy2O3 (x = 0.0, 0.5, 1.0, 2.0) were fabricated. X-ray Diffraction (XRD) showed the dominance of MgB2 phase across the samples. Simultaneous addition of Mg, B4C and Dy2O3 was found to increase the MgB2 fraction. The onset of critical temperature remained unchanged indicating

This study investigates the effect of Cu2Se doping on the morphology, structure, and reaction process of MgB2 superconductors. Polycrystalline MgB2 samples with different Cu2Se doping levels were synthesized using the conventional solid-state sintering method. A comprehensive analysis of the phase formation, microstructure, and sintering mechanisms was investigated. The results indicated that Cu2Se

The high-entropy perovskite oxides (HEPOs) have distinctive electrical properties stemming from the high-entropy effect, rendering them as promising candidates for utilization in dielectric energy storage applications. In this work, a collection of (1-x)(Bi0.4Na0.2K0.2Ba0.2)TiO3- xBi(Zn2/3Nb1/3)O3 HEPOs was fabricated. A systematic investigation was conducted into the ferroelectric properties and dielectric

In order to achieve high-quality welded joint of spray-formed (SF) 7055 aluminum alloy (Sc element added) plate, the electrically-magnetically-assisted friction stir welding (EMAFSW) method was used in this investigation, and the plate was docked by changing the coil current of the rotating magnetic field generator. The effects of rotating magnetic field and different coil currents on the microstructure

With the advancement in superconducting magnet technology, Nb3Sn has emerged as the preferred choice for applications requiring high magnetic field. Moreover, Cu-Sn alloy is thought to be the primary material used to prepare Nb3Sn superconductor. And Sn chemical potential (or Sn activity) could significantly affect the formation and the microstructure of Nb3Sn superconductor. However, insufficient

The advancement of modern industry requires the development of high-performance materials capable of operating in extreme environments, such as at cryogenic and high temperatures. Face-centered cubic (FCC) high entropy alloys (HEAs) show remarkable mechanical properties at low temperatures caused by nano-twinning. However, their strength is insufficient at both room and elevated temperatures. To address

This study reports a novel coating with enhanced solar absorptance and reduced thermal emittance with high efficiency at elevated temperature for next-generation concentrated solar power (CSP) plants, with targeted operating temperatures around 750°C. Highly textured cobalt-nickel oxide (CNO) coatings were electrodeposited onto Inconel substrate by systematically varying the molarity of cobalt and

This study investigated the behavior of B4C-Gr nanoparticles filled aluminum alloy 6061 (AA 6061) syntactic foam under high temperature compressive deformation. The experiment examined varied strain rates (ranging from 0.001 to 1 s-1) and temperatures (changing between 100 to 250°C). Calcium carbonate powders are utilized as blowing agents in this process (CaCO3 3 wt.% of composite with a 40-50 µm

Given the persistent and detrimental impact of atmospheric ozone (O3) on human health, achieving high-sensitivity detection of ozone at low temperatures is crucial for mitigating its harmful effects. Here, by hydrothermal synthesis and annealing, hexagonal and orthogonal WO₃ (h/o-WO3) homojunction nanosheets were prepared and used as high-performance O3 sensors. The results showed that the optimal

The present study used mechanical milling and Spark Plasma Sintering (SPS) techniques to synthesize the sintered Fe-Mo-Si alloys from ferromolybdenum and ferrosilicon lumps. Three different compositions of ferromolybdenum and ferrosilicon ratio (in at%) as 65:35, 60:40, and 55:45, namely as 6535FMS, 6040FMS, and 5545FMS, respectively, were prepared at 950 °C for 5 min in holding time under a constant

An overview of the microstructural and mechanical properties of Al-Co-Cr-Fe-Ni-Ti high entropy alloys (HEAs) at high temperatures is presented. With exceptional properties at high temperature and high dissolution temperature of the L12 phase (γ′), HEAs exhibit excellent wear resistance, thermal stability, high hardness and strength, superior corrosion resistance, and remarkable electrical and magnetic

During the directed energy deposition (DED) of superalloys, rapid solidification rates and nonuniform temperature gradients usually lead to the formation of coarse columnar grains and complex precipitates. The appropriate post-processing techniques are necessary, and the heat treatment shows the promising in optimizing microstructure of the DEDed superalloys. To simultaneously control second phase

To enhance the wear resistance of the Ti6Al4V alloy surfaces, four TiB-reinforced titanium matrix composite (TMC) coatings were in-situ synthesized via laser cladding. This study systematically explored the effects of varying TiB2 contents (5, 15, 25 and 35 wt%) on the microstructure, hardness and wear resistance of the coatings. The results revealed that all TMC coatings contained in-situ synthesized

Oxide-dispersion-strengthened (ODS) steels are important candidate structural materials for the first wall cladding of fusion reactors. In this study, 2–3 mm thick Fe-9Cr alloy thin strip steel (Fe-9.13Cr-0.76W-0.09Y-0.26Zr-0.35Ti-0.06 C) was successfully prepared using a new two-roll thin strip continuous casting technique featuring sub-rapid solidification and continuous forming. The microstructure

Structural regulation of both macro-shape (cubes, films) and microstructure (ligament size, porosity) of nanoporous metals is of central importance for their fundamental studies and practical applications. The choice of dilute solid solutions as precursors for dealloying provides great chances for structural regulation of nanoporous metals, but has received little attention. Herein, a series of dilute

Tin-doped indium oxide (ITO) films are often used as transparent electrodes for optoelectronic applications such as electrochromic devices (ECDs) and solar cells. Preparing ITO films below intermediate temperatures (≤ 350 °C) has become a challenge that must be solved to expand their range of applications (such as all-solid-state ECDs based on phosphate proton conductors and flexible optoelectronic

In perovskite resistive random access memories working with the formation of iodine vacancies conductive channels, I- ions in perovskite are migrated toward the anode and oxidized to I2 molecules, which then accumulated at the perovskite/anode interface under the applied positive voltage. However, I2 molecules are extremely unstable and easy to sublimate outside the devices. Here, a crown ether dibenzo-24-crown-8

The infrared-radar compatible stealth material with a double-layer structure was prepared by using polysiloxane as an organic binder, Al powder as a low infrared emissivity functional filler, and carbonyl iron powder as a radar-absorbing material, respectively. The influence mechanism of metal powder content on electromagnetic waves has been studied by using the Al powder random distribution model

The development of high-temperature electronic equipment places high demands on ultra-wide temperature multilayer ceramic capacitors (UWT-MLCCs). However, the contradiction between the high dielectric constant and excellent temperature stability of existing dielectric materials has hindered the development of UWT-MLCCs. Here, these problems have been solved by constructing localized defect dipoles

This paper investigates the electrochemical performance of LixNa1-xNi0.8Al0.2 (x=0.1, 0.2, 0.3, 0.4, LNNA) with different ratios of Na doping as electrode materials for ceramic fuel cells. It is found that the maximum power density (MPD) of the ceramic fuel cells prepared by co-pressure method with LNNA as symmetrical electrodes and GDC as electrolyte gradually decreases with the increase of Na doping

In addressing the challenges of complex electromagnetic environments, the development of lightweight, thin, and multifunctional radar-absorbing devices is essential. This study advances previous work on composites of high-entropy dual-core shell HEOs@C and graphene (GR) by optimizing a cross-arrow gradient structure for broad-angle and wideband microwave absorption. Fabricated via FDM 3D printing,

The machined surface geometric quality including surface roughness, surface morphology and surface defects can significantly influence the wear and fatigue resistance of components, and this problem is garnering increasing attention. However, for heterogeneous materials such as cast irons, the systematic investigation of the machined surface geometric quality and the role of secondary phase particles

The Ni nanowire arrays (NWAs) with different aspect ratios were prepared in anodized aluminum oxide (AAO) template nanopores by electrodeposition. The results of SEM and TEM demonstrate that the vertically aligned, free-standing Ni NWAs are uniformly distributed on the gold substrate, and the diameter of the nanowires is basically consistent with the pore size of the template. The crystal form is a

In this study, pure perovskite NiMnO3 and various Mn3O4/NiMnO3 nanocomposites were synthesized using a hydrothermal method and applied as supercapacitor electrodes. The crystal structures, surface morphologies, and chemical species of the samples were investigated using X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy. The electrochemical properties of these materials

Co2Z, a magneto-dielectric ferrite, has the potential to be used in the study of antenna miniaturization. The solid-state reaction method was employed to synthesize a series of Ba1.5Sr1.5Co2MnxFe23-xO41 (x = 0.0-1.0) hexaferrites in this paper. The crystal structure, microstructure, magnetic and dielectric properties were tested and investigated. The Mn3+ substitution did not introduce a second phase;

Undesirable interfacial reactions and the resulting capacity degradation hinder the widespread application of lithium-rich layered oxide (LLO) as a cathode in high-energy lithium-ion batteries. Herein, a method to suppress the interfacial reactions of LLO is devised by treating the carbonate precursor with weak-base salts to induce elemental segregation and promote particle growth, by which a rock-salt

Core-shell nanowire (C/S NW) photoanodes for photoelectrochemical water splitting (PEC-WS) are an effective and promising strategy to enhance light harvesting. Here, ZnO/Ta3N5 C/S NWs passivated by pyridine are fabricated for the first time as photoanodes in PEC-WS. The ZnO/Ta3N5/Pyridine C/S NW with an optimal Ta3N5 shell coating, 10 nm thick, exhibit a maximum photocurrent density of 4.46 mA/cm2

This study uses hydrothermal synthesis combined with calcination to prepare magnesium aluminate spinel powders, discussing the impact of hydrothermal conditions and the stoichiometric ratio on the structure and intrinsic luminescence of magnesium aluminate spinel. The results show that at a low hydrothermal temperature of 120 °C for 24 hours, a standard MgAl2O4 phase can be obtained. However, at higher

In this work, solid-phase hydrogen diffusion is investigated as a treatment for a Co-based (Co75.4Fe3.5Cr3.3Si17.8) amorphous membrane, made of metallic glass. We report a noticeable growth of diffusion through the amorphous membrane at higher environmental acidity and constant ionic activity in the chloride-acidic solutions. This effect has been explained by a presence of two adsorpted hydrogen atomic

Recently, vacancy-ordered double perovskite phosphors have garnered significant attention due to their high quantum efficiency, elevated carrier mobility, and favorable fluorescence properties. Vacancy ordered double perovskite phosphors has poor fluorescence properties due to the high number of vacancies. The fluorescence characteristics and stability can be enhanced through strategic ion doping.

The construction of NiFe-based composites on foam metal is an advanced strategy to design high-performance catalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Herein, we chose Fe foam (FF) as the substrate, which was first modified by anodic electrodeposition to form a porous and loose FeSx/FeOx layer. This modified layer facilitates the construction of nanoflower-structured