The Ni3Al-based alloy has been considered as a robust catalyst for oxygen evolution reaction (OER) due to its long-term durability and acceptable activity. However, related reports about understanding the catalytic mechanism are rare and desirable. Herein, the effect of γ/γ' phase lattice mismatch on the catalytic performance caused by various cooling rates after solution heat treatment was investigated

The B2 structure based MIL composites was fabricated by a two-step processing: the stacked Al and Fe foils were firstly hot pressed under eutectic reaction to form the Al-rich intermetallic phase(Fe2Al5) layer by consuming all the Al foils. And then, for forming the Fe-rich intermetallic phase (FeAl with B2 structure), three kinds of experiments were carried out to transfer the Al-rich phase layer

The recent electronic appliances and hybrid vehicles need a high energy density supercapacitor that can deliver a burst and a quick power supply. The high energy density supercapacitor can be obtained by designing proper electrode materials along with appropriate electrolytes. This review begins with different mechanisms of energy storage, giving a brief idea regarding how to design and develop different

Due to its unique I-V property, memristor is considered to be the key device for artificial intelligence application. Among the alternative memristor materials, organometal trihalide perovskite (OTP) follow with interest in photoelectric coupling area with excellent light absorption ability. However, the power consumption of OTP memristor still remains to be reduced. Here, Cs0.05(FAxMA1-x)0.95PbIyBr3-y

Temperature sensor and field emission displays (FED) are the intensive topics for Sm3+ activated red phosphor. In this study, a novel lithium nitride red phosphor Li2CaSi2N4:Sm3+ was successfully prepared by solid phase method. The photoluminescence and cathodoluminescence performances were systematically studied to explore the possibility in FED and temperature sensor applications. The results indicate

The in-situ TiC/Ti2Ni reinforced CrTi4-based laser cladding composite coating was fabricated on Ti811 alloy. The phased composition and microstructure of the composite coating was studied, and the interface relationship between CeCrO3 and Ti2Ni was investigated in detail. The results show that the formation phases of the coating contain TiC, Ti2Ni, CrTi4, and CeCrO3. The density functional theory (DFT)

The strategy of the strength-ductility balance of aluminum matrix composites (AMCs) reinforced with nano- and micro-SiC particles via deformation-driven metallurgy was designed. The grain refinement of SiCnp/AMCs was promoted with the nano-SiC particles intragranularly-dispersed, and the stability of the ultra-fine-grains was improved due to the Zener pinning mechanism. The ultimate tensile strength

Powders of Fe50Al30Ni20 (wt%) are being milled in a P7 high-energy planetary ball mill to determine the effect of milling time on magnetic properties. In order to track changes in morphology and magnetic properties, SEM, magnetic measurements, and Mossbauer spectroscopy were employed during milling. Multiple phases are present; B2-(Fe, Ni)Al dominates, and Fe(Ni, Al) is second in strength. This indicates

The effects of the extrusion temperature and extrusion ratio on the microstructure, corrosion resistance, and mechanical properties of Mg–Zn–Gd–Y–Zr alloy were investigated. The dynamically recrystallized grain sizes were found to increase with increasing temperature at a given extrusion ratio. At a smaller extrusion ratio, the alloys consist mainly of a bimodal grain structure. Although these have

All-inorganic CsPbI3 quantum dots perovskite solar cells (QDPSCs) have wide potential application due to their excellent photoelectric properties with high environmental stability. However, the poor interface contact between the light absorption layer and hole transport layer (HTL) results in the serious carrier recombination and the large open-circuit voltage (VOC) loss. Herein, we introduce the insulating

Perovskite oxides have been considered as ideal electrocatalysts for water electrolysis since they are eco-friendly, abundant, and easy to be fabricated. However, their application in hydrogen evolution reaction (HER) is still limited because of relatively poor efficiency and stability. Herein, we report that a facile fabrication method, pulsed laser deposition, is employed to fabricate nanoscale LaCoO3−δ

Strain-induced precipitation was systematically investigated in austenitic Inconel 617B superalloy (IN617B) after deformation of 0.2 true strain in its service temperature range (700–850 °C). The precipitation-time-temperature (PTT) curves obtained by stress relaxation experiments showed a classic C-shape with the nose temperature of 800 °C, and a minimum incubation period of 30 s, and the main strain-induced

In this study, the recrystallization process in deformed high-purity aluminum was investigated by using the internal friction (IF) and hardness measurement. In the heating process, two IF peaks were detected when the heating rate is 2 °C/min: a sharp peak (P1 peak) at ~139 °C and a wide peak (P2 peak) at ~278 °C (0.5 Hz). In the subsequent cooling process, the P1 peak disappears while the P2 peak remains

The multi-arc ion plating technology is used to prepare CrN coating on the valve seat material surface. Results show that the surface grains gradually increase in size and becomes less uniform with the increase of the Cr target current. At different Cr target currents, the main phases of the CrN coating are Cr, CrN, and Cr2N. The critical load of the coating and matrix is 49.2 N. When the Cr target

Inspired by the nanostructured graphene-based membranes for ionic sieving, an ion-oriented interface of few-layer graphene (FLG) was rationally constructed to achieve long-life zinc (Zn) metal anode. The ion-oriented interface increased the nucleation sites and inhibited localized dendrite growth, which aided the uniform transmission of Zn ions. Moreover, the fewer oxygen-containing functional groups

Ti3C2Tx (MXene) materials with multilayered structures have been widely developed in various academic fields. However, the application of electromagnetic wave (EMW) absorption is limited because of the high conductivity, which leads to impedance mismatch. Herein, the impedance-matching properties were optimized by loading highly defective TiO2 onto an MXene sheet with S-doping and high-temperature

The low depolarization temperature has hindered implementation of (Na1/2Bi1/2)TiO3 (NBT)-based lead-free piezoceramics in practical application, in particular, in high temperature environment. In this work, the impact of Fe modification on the microstructure, depolarization temperature, ferroelectric and piezoelectric properties of 0.94(Na1/2Bi1/2)TiO3-0.06BaTiO3 (NBT-6BT) lead-free ceramics were studied

Aluminum matrix nanocomposites were manufactured by selective laser melting (SLM) of 0.5 wt% multi-walled carbon nanotubes (MWCNTs) modified Al-Mg-Sc-Zr alloys. The influence of MWCNT addition on the manufacturing quality, the phase formation and the mechanical properties of the Al-Mg-Sc-Zr alloys was investigated. It is found that primary Al3(Sc,Zr) particles precipitated and were uniformly dispersed

In-situ synthesized Al matrix composites (AMCs) have drawn lots of interest recently relying on the designability of reinforcement configurations and promising mechanical properties. In this work, a new generation of AMCs reinforced by in-situ MgAl2O4 particles was fabricated based on Al-Mg-ZnO system using shift-speed ball-milling (SSBM) combined with reactive sintering method. The detailed microstructural

A cost-effective and simple hydrometallurgy procedure for recycling the diamond core drilling crowns by nitric acid leaching, followed by the sodium hydroxide leaching, has been developed. The effect of temperature, nitric acid/sodium hydroxide concentration, leaching time and stirring rate were studied. For the acid leaching process the optimal values for parameters were 60 °C, 1.0 M HNO3, 2.5 h,

The accurate description of the potential energy landscape of moderate-sized nanoparticles is a formidable task, but of paramount importance if one aims to characterize, in a realistic way, their physical and chemical properties. We present here a Neural Network potential able to predict structures of pure and mixed nanoparticles with an error in energy and forces of the order of chemical accuracy

Nanoscale precipitation is one of the most widely used microstructural tools to manipulate the properties of metallic alloys, and especially to reach high strength. Optimal microstructures are reached through complex solid state phase transformations involving non-isothermal heat treatments, metastable phases, complex chemistry, non-equilibrium vacancies, and interaction with structural defects. These

Cyanidation circuits that treat sulfidic ores may contain one or more of the following reduced sulfur species: sulfide (HS−), polysulfides (Sn2−), thiocyanate (SCN−), thiosulfate (S2O32−), trithionate (S3O62−), tetrathionate (S4O62−), pentathionate (S5O62−), hexathionate (S6O62−). The actual speciation of the reduced sulfur species in the circuits will primarily depend on the redox potential, pH, cyanide

Niobium consumption has burgeoned owing to the increasing application of niobium in critical industries, including the aerospace and oil and gas industries. Conventional metallurgical technologies and separation methods for niobium extraction use highly concentrated HF, which is hazardous to both humans and the environment. A solvent extraction system comprising trioctyl tertiary amine (N235) and

It is urgent to develop highly efficient, stable and low-cost bifunctional electrocatalysts for overall water splitting. Herein, an iron-nickel phosphide (Fe2P/Ni2P) heterostructure, constructed by Fe2P nanoparticles embedded on Ni2P nanosheets, is strategically fabricated on nickel foam via a facile process. As a bifunctional electrocatalyst, the Fe2P/Ni2P heterostructure delivers a very low overpotential