In this research, the influence of plastic deformation on the corrosion behaviors of CrCoFeMnNi high entropy alloy were comprehensively investigated. As the degree of plastic deformation increases, both the acceptor density of the passive film and the thickness of the space charge layer increase, while the resistance of the passive film gradually weakens. The Fe and Cr oxides on the passive films decrease

Biodegradable implants are taking an increasingly important role in the area of orthopedic implants with the aim to replace permanent implants for temporary bone healing applications. During the implant preparation process, the material's surface and microstructure are being changed by stresses induced by machining. Hence degradable metal implants need to be fully characterized in terms of the influence

A metastable β Ti alloy was additively manufactured by laser powder bed fusion (LPBF). Tensile testing along the build direction of the as-LPBF material (LPBF-0°) revealed significant work softening immediately following yielding with no uniform deformation. By contrast, substantial work hardening and uniform elongation well over 10% were achieved perpendicular to the build direction (LPBF-90°). Similar

Self-lubricating composites are required to have excellent tribological performances and good mechanical properties when they are applied as mechanic parts. However, the brittle nature of most lubricants will weaken the mechanical properties of the composites where in order to get the lubricating ability proper amount of lubricants are usually incorporated, bringing challenges for them to get well-balanced

Effects of a precipitation treatment on the thermoelectric properties in a CoSi thermoelectric material are investigated by scanning and transmission electron microscopy. The Seebeck coefficient and electrical conductivity are explained based on electron-phonon scattering by considering relaxation time approximation and its electronical structure in the framework of the Boltzmann transport equation

A charge ordering phenomenon within the crystallographic sites as following Sr4(Fe0.143+Co0.363+)48h(Fe0.114+Co0.144+Co0.253+)48fO10.52 was previously reported thanks to neutron diffraction coupled with Mossbauer spectroscopy studies. Such distribution supports a natural magnetic layered structure combining both in-plane ferromagnetic super-exchange interactions mainly on the octahedron “8 f” sub-layer

We report two new quaternary BaCu6Sn2As4-x and BaCu6Sn2P4-x phases with a new structure type, which are fully characterized by single crystal X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and scanning transmission electron microscopy (STEM). These two phases crystallize in tetragonal cell with space group I4/mmm (#139) and Pearson symbol tI26. The refined

Many interesting physical phenomena emerge in the vicinity of phase transition temperature (Tc) for magnetic materials. However, it remains a big challenge to elucidate the near-Tc behaviors of chiral helimagnets, owing to their diversified magnetic interactions and complicated phase transitions. Here, we have systematically studied the near-Tc properties of a chiral helimagnet Cr1/3NbS2 by magnetotransport

In this paper, silicone-resin coating Fe-Si soft magnetic composites (SMCs) with high magnetic permeability, low core losses and good temperature/frequency stability were successfully fabricated. Microstructural characterizations suggest that the thin, continuous and heat-resistant silicone-resin coatings are constructed surrounding magnetic particles. The effective permeability of SMCs is significantly

ZnO samples were prepared by an easy process based on green synthesis using three different concentrations of the parsley extract as natural reducing agents. The semiconductors were characterized structural, morphological, and opto-electronically by XRD, SEM-EDS, diffuse reflectance, and photo-response, respectively. Hexagonal structure ZnO-based semiconductors were obtained after the annealing process

To improve microstructure and fracture toughness of MASC alloy, the effects of element substitution of Zr for Hf on the microstructure and room-temperature fracture toughness in Nb-24.7Ti-16Si-xHf-yZr-2.0Cr-1.9Al (x+y=8.2) alloys have been investigated in this study. The results show that the substitution of Zr for Hf in MASC alloy promotes the eutectic reaction of (Nb, X)3Si phase → Nbss/γ(Nb, X)5Si3

In this work micro-arc oxidation (MAO) process in the presence of an alkaline electrolyte with different amount of graphene oxide (0, 10, 20 and 30 mg/L) has been applied on AZ91 magnesium alloys, successfully. Microstructure, phase evaluation, scratch test, corrosion behavior, bioactivity and antibacterial properties of fabricated ceramic coating were compared. The results reveal that in addition

Mechanical properties of fine-grained Al-(1, 2, 3)%Zn alloys obtained by Equal Channel Angle Pressing were studied. The recrystallization activation energy was found to decrease with increasing Zn content. The Hall-Petch coefficient for the Al-Zn alloys was found to change nonmonotonously during annealing. An increased Zn concentration at the grain boundaries was shown to result in altering the creep

We investigate the piezoelectric and ferroelectric properties in island-like ferroelectric regions of bismuth ferrite oxide films. Samples were synthesized by the simultaneous laser ablation of bismuth, and iron oxide targets. Bismuth content in the deposited films was controlled with the plasma density (Np) that is produced during the ablation of the Bi target. A change in the NpBi alters the Bi incorporation

The high-temperature deformation mechanical behavior and dynamic recrystallization(DRX) kinetics model of Ti-47.5Al-2.5V-1.0Cr-0.2Zr alloy were studied by thermal compression tests on a Gleeble thermal simulator. The influences of deformation heat and friction on rheologic stress were calculated and corrected. The results show that the rheologic stress corrected by friction is less than the experimental

In the present paper, polycrystalline samples of LiInCr4-xMnxO8 varying from 0.0 to 0.5 were synthesized by the solid state method. In order to explore the effect of substitution Cr by Mn in LiInCr4O8, the structural, magnetic and dielectric properties are studied. The result of XRD patterns show that there is a nonmonotonic expansion in the lattice parameter, which may be due to ions disorder or/and

Cu1.8S (digenite), a copper sulfide with natural Cu deficiencies, possesses excellent conductivity, low-cost, as well as environmentally friendly features. It has thus recently attracted heightened attention. However, the thermoelectric performance of pristine Cu1.8S is poor, and the related mechanical properties have not been deeply investigated, which hinders this material from becoming a candidate

Photocatalytic overall water splitting is considered as one of the most promising way to solve the energy crisis. Herein, Pt/g-C3N4/BiOBr S-scheme heterojunction photocatalyst with hollow microsphere structure was prepared by solvothermal method, and its photocatalytic activity toward overall water splitting was evaluated. The H2 evolution rate of Pt/g-C3N4/BiOBr is 361 μmol·g-1·h-1, which is 2.7 times

Flexible force-sensitive sensors are widely used in wearable devices, electronic skins, human-computer interaction and other fields due to their simple manufacturing process, low cost, strong flexibility and great integration potential. A new type of FeSiBY amorphous alloy flexible force-sensitive film and its sensor has been developed in this paper. The film had high elastic modulus, microhardness

In dye-sensitized solar cells (DSSCs), TiO2 has long been a popular electron transport material for carrying photo-generated electrons from the dye to the outer circuit. However, increasing the electrical conductivity of TiO2 while preserving its properties is one of the most significant challenges for increasing DSSC efficiency. Here, cobalt-reduced graphene oxide co-doped TiO2 nanoparticles were

Molecular dynamics (MD) simulations based on the embedded atomic method (EAM) are used to study the annealing effect on elastic and structural behavior for different cooling rates of binary Mg25Al75metallic glasses (MGs). Firstly, we examine the cooling rates effect (5×1011K/s, 1012K/s, 5×1012K/s and 1013K/s) on the atomic locale structure of Mg25Al75MG through a variety of local structure analysis

In this work, the influence of different heat treatments on the martensitic transformation and precipitation in polycrystalline Cu13%Al4%Ni shape memory alloys have been investigated. A CuAlNi strip were subjected to different heat treatments in order to obtain a variety of microstructures. In this way, the samples were aged at a temperature between 200 and 450 °C. Some specimens were heat-treated

The experimentally determined integral enthalpy of mixing of liquid Ag-Mg alloys has been presented. Three separate measurements have been made at 991, 1141, and 1272 K with the use of an MHTC 96 Line Evo line drop calorimeter. The values of integral molar mixing enthalpy are characterized by negative deviations from the ideal solutions in the entire concentration range. Based on the obtained calorimetric

Phosphor covered light-emitting diodes (PC-LEDs) are wide applied to diverse fields due to its great advantages compared with the traditional light source. Therefrom, we report new rare-earth-free red-emitting Mn4+ doped Ca2InSbO6 and Sr2InSbO6 phosphors with excellent photoluminescence performance by the solid phase synthesis route. The resultant samples possess broad excitation band that is able

Lead-free ferroelectric ceramics of (1-x)Ba0.98Li0.02TiO3-xBi(Mg1/2Sn1/2)O3 (abbreviated as (1-x)BLT-xBMS, x = 0, 0.02, 0.04, 0.05, 0.06, 0.08) were synthesized through conventional solid-state sintering method. The effects of Bi(Mg1/2Sn1/2)O3 addition on the phase transition, microstructure, the dielectric properties and the energy storage properties were investigated. All the BLT-BMS samples exhibited

SnS has become a popular anode material for lithium-ion batteries (LIBs) because of its higher theoretical capacity and lower cost. However, the huge volume change and dissolution of sulfur lead to sharply attenuated capacity and less than ideal rate performance in the process of repeated discharge/charge. Here we use silica spheres and allyl thiourea as hard template and carbon/sulfur sources, respectively

A high‑manganese steel-bonded carbide with 50 wt% TiC was prepared using powder metallurgy. In particular, two types of binder systems were prepared with Cr: a FeMoCr pre-alloyed powder and a 304stainlesssteel powder combined with FeMo pre-alloyed powder. We investigated the influence of the Cr content and its alloying methods on the microstructure and mechanical properties of steel-bonded carbides

Metallic vanadium has special properties and is widely used in metallurgy, aviation, nuclear industry and other fields. Vanadium is a rare and refractory metal, its high purity metal is difficult to prepare. The current mainstream extraction method is a combined process of aluminothermic reduction of vanadium oxide and electron beam smelting. Based on the properties of vanadium oxide and vanadium chloride

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,