The effects of Co content on the thermal stability, soft-magnetic properties, corrosion resistance and mechanical properties of (Fe1-xCox)86Ni1B13 (x = 0–0.25) amorphous alloys were systematically investigated. Adequate Co addition can significantly increase saturation magnetic flux density (Bs). Extremely high Bs of 1.78–1.92 T was obtained when Co content was added in the range of x = 0.05–0.25.

Boron removal from lithium-rich brine was systematically investigated by solvent extraction using 2,2,4-trimethyl-1,3-pentanediol (TMPD) dissolved in 2-ethylhexanol and sulfonated kerosene. The extraction parameters were determined, including the concentration of mixed alcohols, lithium and solvents loss. During the extraction, a single TMPD molecule reacted with a single boric acid molecule to form

A closed-loop, Ni extraction and mineral carbonation process is being developed for producing Ni from laterite ores, where the only inputs are heat that can come from regenerable resources, and the ore. This closed-loop relies on efficient regeneration of acid and base, which are required for leaching and neutralisation respectively. This contribution investigates the leaching efficacy of regenerated

Organic-inorganic hybrid perovskite solar cells (PSCs) are continuously attracting much attention due to the poential applications in low-cost and flexible solar energy system. In this work, potassium (K+) and cesium (Cs+) were added into the perovskite (FAMA)Pb(IBr)3 (FA = CH(NH2)2+, MA = CH3NH3+) to prepare the high-quality quadruple-cation (KCsMAFA) perovskite film and PSCs via two-step solution

In the present study, a comparison of the amenability of a monazite and xenotime (both rare earth phosphates) sample to treatment via alternative extraction techniques was conducted. Monazite and xenotime concentrates were studied under the effects of organic acids and mechanochemical pre-treatment. Maleic, tartaric, citric and oxalic acids have shown the ability to increase the dissolution of phosphorus

In recent years, metal matrix syntactic foams have drawn great attention for its benefits, such as lightweight and energy-absorbing characteristics, of being used as the material of packaging, armors and vehicles. In this paper, a novel compound casting technology is developed to produce steel matrix syntactic foams, which brings in hollow Al2O3 spheres with outer diameters of about Ø3.11mm, Ø3.97mm

In the present work, the influence of trace level Cu on intergranular corrosion (IGC) in AA6082 Al–Mg–Si alloy is studied using correlative accelerated corrosion testing and high resolution electron microscopy. Further, grain boundary structure and its correlation to IGC are also investigated using electron backscatter diffraction (EBSD) and transmission Kikuchi diffraction (TKD). It is found that

Rational design of sulfur host materials is the key to the development of superior lithium-sulfur batteries. Here, we designed a composite conductive scaffold that is expected to establish a conductive, adsorption, and catalytic barrier layer to inhibit polysulfide shuttle and improve Lithium-sulfur battery performance. The large scaffold of the carbon nanotube framework enables long-range conductivity

A novel 3D hierarchical urchin-like SiO2@TiO2 sphere with hollow structure and anatase-rutile biphase (3D-UHST) was synthesized via solvothermal process, followed by calcination at various temperatures. The morphology and structure of the synthesized 3D-UHSTs were characterized by SEM, TEM and XRD. A series of SEM characterization results showed that the solvothermal reaction time and the presence

(2020). 2021 Morris Award: Call for Nominations. Ambix. Ahead of Print.

Traditional gas metal arc-based additive manufacturing (GMA-AM), also referred to as wire arc additive manufacture (WAAM), improves deposition rate via increasing deposition current, but it is easy to affect the shape-forming and microstructure of the deposited part due to the increased heat input. To avoid such problems, a novel auxiliary wire feeding GMA-AM (A-GMA-AM) approach is proposed to achieve

This research highlights the influence of bonding pressure on the features of diffusion-bonded joints (DBJs) between Ti6Al4V alloy and TiAlNb alloy investigated at 900 °C for 120 minutes in vacuum with variable pressures of 0.5, 1, 2, 3, and 4 MPa. Characterization of the bonded interfaces was conducted using optical microscopy and scanning electron microscopy in backscattered mode. A molecular dynamics

Scheelite and calcite are usually intergrown calcium minerals that are separated via froth flotation. However, their selective separation remains difficult because of their similar surface properties. 2-phosphonobutane −1, 2, 4-tricarboxylic acid (PBTCA or H5L) is widely used in water treatment due to its low phosphorus content and efficient anti-scaling performance. With its excellent calcium-chelating

Due to the brittleness of molybdenum (Mo) and high difference in melting point, it is still a challenge to clad thick Mo onto copper (Cu) with high quality bonding. In this study, a 5 mm thick Mo plate was successfully welded with Cu plate by hot explosive welding, without any cracks being formed. The maximum shear strength of the interface exceeded 295 MPa. The calculated weldability window indicated

The research aims to provide an alternative to austempering treatment of ductile cast iron with a simple and cost-effective heat-treatment process. This goal was accomplished by applying a simple one-step spheroidization heat treatment to the as-cast ductile iron, which would normally possess a coarse pearlitic microstructure to a significant extent. Spheroidization experiments involving isothermal

Duplex-structured TC21 alloy samples were first solution-treated at a higher temperature in the α + β region (940°C) with furnace cooling (FC), air cooling (AC), and water cooling (WC), followed by a second-stage solution treatment at a lower temperature in the α + β region (900°C), and then finally aged at 590°C. The effects of the morphology and quantity of a phases on the structure and properties

Within the scope of the transregional collaborative research centre TCRC73, the effects of an oscillation superimposed forming process for the production of a demonstrator component are investigated. Previous studies in this field were limited to a consideration of the process-related parameters such as the influence of the plastic work and the friction or the component-related parameters such as the

Tin–silver–copper (SAC) solder alloys are the most promising candidates to replace Sn–Pb solder alloys. However, their application is still facing several challenges; one example is the electrochemical corrosion behaviour, which imposes a risk to electronics reliability. Numerous investigations have been carried out to evaluate the corrosion performance of SAC lead-free alloys, regarding the effect

Quinary AlCoCrFeNi high entropy alloy (HEA) is one of the most studied alloys in the recent decade due to its outstanding properties. However, it is still far from becoming an applicable industrial alloy. To our understanding, in order to promote this, the role of elements, constituting the quinary alloy, needs to be defined. Knowing the role of each element, modification of the quinary alloy toward

The refractory preheating process in oxygen furnaces is a dynamic input of energy in a chemically complex system requiring special attention to chemical emissions relative to permissible release limits. This particular industrial and regulatory interest is the emission of volatile organic compounds (VOC), given their detrimental impacts on human health. In the present work, a mathematical model was

The paper presents the results of microstructure tests of EN AC-46000 hypoeutectic Al–Si alloy with and without high-melting-point elements: chromium, molybdenum, vanadium, and tungsten. The above-mentioned elements were used individually or simultaneously in various combinations. The tested castings were made using two technologies: shell molding and high pressure die casting (HPDC). Using X-ray diffraction

Mining activities generate Acid Mine Drainage (AMD) and wastewater streams rich in dissolved inorganic species that negatively affect water quality. Conventional lime treatment of AMD leads to the precipitation of a voluminous sludge, comprising mainly of Ferri-Oxyhydroxide (Fe-O-OH) and gypsum, whose matrix renders it difficult to dewater. Such precipitates also show poor post-precipitation stability

A comparative study was carried out to investigate the effect of high-pressure grinding rolls (HPGR) comminution on agitation leaching of gold ore in comparison with the conventional jaw crusher (JC) comminution. The HPGR comminution products were evaluated in terms of particle size distribution, specific surface area and average pore volume, and the origin and density of micro-cracks. HPGR comminution

Voltage and capacity decay problems of Li2MnO3-based lithium rich layered cathode materials are still unsolved, which are the major barriers for its practical application. Intensive investigations of their mechanisms have been proceeded in recent years, which clarify cation ordered arrangement and spinel deterioration are culprits in structural aspect. Herein, we conduct various analyses to a rocksalt

GTD222 is an important structural alloy that is applied as a high-temperature hot-end part. In this work, the effect of a high-temperature (800–950 °C) aging treatment on the microstructural evolution and mechanical performance of a GTD222 superalloy fabricated with selective laser melting (SLM) processed is investigated. Precipitates of γ′-Ni3(Al, Ti) with different morphologies and sizes are obtained

In this study, CuFeO2 and Mg-doped CuFeO2 powders are synthesized by using a novel chemical solution route under an ambient atmosphere. By regulating the pH of the reaction solution, on the basis of Pourbaix diagrams, and the stoichiometric ratio of copper to iron ions, delafossite CuFeO2 powders are formed at 363 K in an aqueous solution. Mg-doped CuFeO2 powders are also synthesized by using the same

For purpose of improving the energy storage properties for the Na0.5Bi0.5TiO3 (NBT) film, NBT and BiFeO3 (BFO) were formed into solid solution. The outcomes are that the recoverable energy density (Ure) has been greatly improved, but the energy storage efficiency (η) has decreased. In this study, doping the best ratio of 0.9Na0.5Bi0.5TiO3-0.1BiFeO3 (NBT-0.1BFO) solid solution film with La3+ is to improve

The microstructural and electrochemical properties of anodes obtained by impregnation of the La0.4Sr0.6Ti0.8Mn0.2O3±d (LSTM) oxide system into two types of anode substrates such as Ni/ 8YSZ substrate (Ni (E)/ 8YSZ) and partially Ni removed Ni/ 8YSZ substrate (Ni(R)/8YSZ) were investigated in order to apply them as anode material for solid oxide fuel cells. All of the samples with LSTM impregnated on

Corrosion response of NiCo-carbon nanotube (CNT) composite coatings is extremely sensitive to the CNT content and an optimum CNT amount yields highest corrosion resistance performance. Here, electron back scatter diffraction (EBSD) technique was employed to correlate the microstructure and corrosion behaviour of Ni–Co and NiCo-CNT composite coatings. Texture and grain boundary character distribution

In this study, we synthesized spherical mixed-valence rhenium oxide (MVReO) nanoparticles with localized surface plasmon resonances (LSPRs) covering visible and NIR region. The spherical MVReO nanoparticles were converted into hydrogen rhenium bronze (HxReO3) nanosheets when dispersed in aqueous solution due to the hydrogen insertion into lattice. More importantly, the HxReO3 nanosheets exhibit enhanced

A two-step synthesis method was used to prepare a flexible PVDF/ZnFe2O4 multiferroic nanocomposite film. ZnFe2O4 nanofibers synthesized using electrospinning technique were incorporated into a PVDF matrix to form PVDF/ZnFe2O4 composite films through the solution-casting process. XRD patterns confirmed the formation of the polar β-phase in films, which is responsible for ferroelectricity. The percentage

The Janus WSSe monolayer is a new 2D direct band gap material attracting attention due to its unique physical and chemical properties. The lattice thermal conductivity is calculated using the self-consistent approach as well as single-mode relaxation time approximation. We notice that acoustic modes contribute mainly to the lattice thermal conductivity. Thermoelectric properties are investigated using

Advanced high-strength steel (AHSS) is a class of promising materials for safe and lightweight structural applications in the transportation industry due to its high energy absorption capacity during severe plastic deformation. However, some types of AHSS tend to become brittle after welding and fail during forming operations. This paper proposes a novel method of laser welding AHSS class of 22MnB5

Porous TC4 alloy scaffolds with curved struts were fabricated by selective laser melting (SLM), and the compression deformation behavior of the TC4 alloy scaffolds was studied. When the porous scaffold is compressed along the direction of the building, the stress of the porous scaffold first increases sharply with the increase in the strain, then decreases rapidly and finally shows a stepped increasing

The oxidation of cemented carbide can affect its service performance due to the significant reduction in mechanical properties. This paper investigates the oxidation of WC-Co cemented carbide under both isothermally and laser irradiation conditions. The nanosecond pulsed laser was used to perform laser-induced oxidation in both air and pure oxygen. In comparison, the microstructures of oxide layer

ZrB2 and ZrB2-based composites have extensive applications; however, their application is hindered by their low fracture toughness at room temperature. A ZrB2/(NbTi) composite with 60 wt% ZrB2 was densified to 97.1% through hot-pressing sintering at 1600 °C under 30 MPa. The phase, microstructure, and room and high-temperature (800–1200 °C) mechanical properties of the composite were investigated.

The average silicon content of the hot metal produced by Corex furnace is 0.6–1.5 mass%, which increases the oxygen blowing time and leads the unsatisfactory dephosphorization, high reblowing rate. The oxidation of carbon and silicon and optimization of dephosphorization during the refining process were studied through industrial practice and theoretical calculation. The results show that the optimum

The reduction of magnetite concentrate particles by H2 has been investigated in drop-tube reactor (DTR) to obtain a rate equation that can be applied to the design and analysis of an ironmaking flash reactor. The temperature range in this work is 1623 to 1873 K, where the magnetite concentrate particles become molten droplets. Full reduction of the magnetite concentrate is achieved at a residence time