Powders - Science topic

DEAR ALL I am the guest editor of the Special Issue "Trends and Advances in Photocatalytic Thin/Thick Film Materials", This is a a special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Surface Engineering for Energy Harvesting, Conversion, and Storage". I invite to every one interested in photocatalysis research to...

The concept of cell boundary (CB) engineering was proposed to explore the potential benefits of segregation engineering in obtaining superior mechanical properties in materials printed via laser powder bed fusion (LPBF). Mo-doped and Mo-free ferrous medium-entropy alloys (FeMEAs) were additively manufactured using LPBF. A high density of dislocatio...

Currently, every 1 kg of instant coffee produced results in 2 kg of wet SCG, accounting for 45% of total annual production. Instead of being wasted and causing environmental issues, SCG can be utilized for its potential to create valuable products with added value. This study explores the underutilized potential of spent coffee grounds (SCG) as a f...

This study focuses on the powder grinding process, which is a necessary step for material synthesis in materials science experiments. In material science, powder grinding is a time-consuming process that is typically executed by hand, as commercial grinding machines are unsuitable for samples of small size. Robotic powder grinding would solve this...

This study focuses on the powder grinding process, which is a necessary step for material synthesis in materials science experiments. In material science, powder grinding is a time-consuming process that is typically executed by hand, as commercial grinding machines are unsuitable for samples of small size. Robotic powder grinding would solve this...

Dependence on external raw materials, the high cost of fertilizers, and the search for more sustainable alternatives have encouraged research with remineralizers. This study aimed to evaluate the effect of adding remineralizers associated or not with a bioactivator on pH, H+Al, Al, P, and K in two soils after four incubation times. A completely ran...

CHEN Zhiyong，LI Ye．Deciphering the chemical profile and pharmacological mechanism of Jinlingzi powder (金铃子散) against bile reflux gastritis using ultra-high performance liquid chromatography coupled with Q Exactive Focus mass spectrometry， network pharmacology， and molecular docking[J/OL]．Journal of Traditional Chinese Medicine.

Hierarchical structure features complex geometric topology and excellent mechanical properties. In this work, analytical models are developed to predict the mechanical properties as Young's modulus, Poisson's ratio, and yield stress of a lattice structure composed of hierarchical body-centered cubic. Analytical results were validated by finite elem...

Polycrystalline powder samples of La0.67Sr0.33−xKxMn0.95Ni0.05O3 (x = 0.1, 0.125, 0.15) (LSKMNO) were prepared using the sol–gel method (S-G) in this study. The influence of K⁺ doping was systematically investigated on the lattice structure, morphology, and magnetic and magnetocaloric effect (MCE) of LSKMNO. Through the X-ray diffraction (XRD) to c...

Herein, a simple, solvent‐free method to fabricate polymer‐encapsulated halide perovskite photoconductors is described. Dry mechanochemical synthesis is used to prepare CsPbBr3 in the presence of poly(butyl methacrylate) (PBMA). The resulting composite powder is then heated and pressed into a free‐standing disk with a thickness controlled by a meta...

Random granular media can exhibit characteristics that are often related to ordered media. In the present work, this feature is observed in the polarized Second Harmonic Generation (SHG) response from reduced iron‐doped lithium niobate (LN:Fe) powders, which is an unexpected effect due to multiple scattering. In addition, the subsisting‐order prope...

Self-seeded hard X-ray pulses at PAL-XFEL were used to commission a resonant X-ray emission spectroscopy experiment with a von Hamos spectrometer. The self-seeded beam, generated through forward Bragg diffraction of the [202] peak in a 100 µm-thick diamond crystal, exhibited an average bandwidth of 0.54 eV at 11.223 keV. A coordinated scanning sche...

The effect of graphite powder on the machining characteristics in graphite-powder-mixed electrochemical discharge machining of microholes was still not clear. How the discharge mechanism changed with the addition of graphite powder into the electrolyte, which further led to changes in the morphology of the machined holes, remained to be revealed. I...

In order to achieve rapid detection of galactooligosaccharides (GOS), fructooligosaccharides (FOS), calcium (Ca), and vitamin C (Vc), four micronutrient components in infant formula milk powder, this study employed four methods, namely Standard Normal Variate (SNV), Multiplicative Scatter Correction (MSC), Normalization (Nor), and Savitzky–Golay Sm...

The employment of metal-organic frameworks in powder form is undesirable from an industrial perspective due to process and safety issues. This work is devoted to evaluating the impact of compression on the textural and structural properties of CPO-27(Ni). For this purpose, CPO-27(Ni) was synthesized under hydrosolvothermal conditions and characteri...

High-pressure forming at 300 MPa and room temperature was applied before the sintering of a lithium fluoride (LiF) powder. The as-fired samples were tested as dielectrics and showed very interesting characteristics. The best sample, sintered at 750 °C for 8 h, had a relative permittivity of 12.1 and a loss tangent of 0.0006, both of them frequency-...

This study investigates the wear and corrosion performance of AlSi10Mg alloy produced through casting and laser powder bed fusion (LPBF), followed by direct aging (DA) treatment at 180 °C for 6 h. Further, metallurgical characteristics and hardness performance were analyzed to assess the impact of DA heat treatment and to correlate the microstructu...

Проведение оценки гемостатического действия тромбина в монокомпонентных лекарственных формах и в составе комбинированных покрытий на основе природного полимера – бактериальной целлюлозы явилось для нас важным этапом в разработке новых гемостатических средств локального действия. Были проведены исследования «in vivo» и «in vitro» препарата тромбина...

Additively manufactured parts consisting of polymer powders blended with carbon black have increased protection against ultraviolet radiation and thus are beneficial for applications involving intensive exposure to sunlight. However, this powder blends are challenging to be processed in laser-based powder bed fusion of polymers (PBF-LB/P) due to th...

Thermal damage to diamonds is a major limitation in laser powder bed fusion (LPBF) processing of metal matrix diamond composites. In this paper, a numerical simulation model was established to describe the thermal effect of the Diamond-CuSn10 composite on the LPBF process. The simulation results show that the temperature of the diamond presents a d...

Objective: The Areca catechu L. is a tropical fruit, which is also called betel nut and is widely distributed in different parts of the world. Areca catechu L is used for various treatment aliments in the form of various preparations especially in powdered form and it used extensively in Ayurveda to treat Mukhavikara, Aruchi, Yonishaithilya, Shveta...

Selective laser melting is a form of additive manufacturing in which a high-power density laser is used to melt and fuse metallic powders to form the final specimen. By performing fatigue and tensile tests under various loading conditions, the study sought to establish the impact of internal defects on the specimens’ fatigue life. Scanning electron...

The compounds Li 6 MoN 4 and Li 6 WN 4 were prepared from the reactants M ( M = Mo, W) and Li 3 N in a radiofrequency furnace at 1000 °C. The lithonitridometallates crystallize in the tetragonal system with the lattice parameters: a = 6.6844(1), c = 4.9294(1) Å for Li 6 WN 4 based on single-crystal X-ray diffraction data and a = 6.6611(3), c = 4.93...

In this study, nano-scale hydroxyapatite (HAP) powder was successfully synthesized from waste eggshells and combined with Lysinibacillus cavernae CR-2 to form bio-microcapsules, which facilitated the enhanced removal of Cr(VI) from wastewater. The effects of various parameters, such as bio-microcapsule dosage, HAP dosage, and initial Cr(VI) concent...

Newly developed copper-iodide cluster microcubes offer a solution to the issues commonly faced by powder scintillation screens. These problems include inadequate scintillation performance and significant light scattering, resulting in poor image quality. With the advent of monodisperse copper-iodide cluster microparticle scintillators, efficient an...

In order to improve the high-temperature oxidation resistance of Ti60 alloy, a Ti-Hf-Mo-Ta-Nb-B composite coating was prepared on Ti60 alloy with Ti, Hf, Mo, Ta and Nb powder and B powder as raw materials using laser cladding. The microstructure and oxidation behavior of the coating before and after oxidation at 1100 °C × 120 h in static air were s...

Concrete is one of the materials in construction that continues to develop in strength and efficiency. Since most areas in Indonesia are vulnerable to earthquakes, the building structures must be more resistant to seismic forces. Increasing the concrete's strength might reduce the building structure's dimensions and weight, which will also reduced...

Laser melt injection (LMI) provides a new route for fabricating multi-material components with tailored physical performance and distributed functional properties. However, the widespread industrial adoption of metal matrix composite (MMC) fabricated by LMI is still hampered by repeatability and reliability compared to monolithic alloys. This study...

Additive manufacturing technology like laser powder bed fusion represents a valid alternative for the production of ferromagnetic cores. In this study, two grades of steel were considered, with standard (3.0 wt%) and high (6.5 wt%) Si content. The study is aimed at optimizing the process parameters in order to obtain components suitable for magneti...

The microstructure of AS10/xNi hypoeutectic alloys with (x = 0.01% and 0.05%) was investigated using X-ray diffraction (XRD) and scanning electron microscopy (SEM). Localized permanent plastic deformation (Vickers hardness (HV)) was conducted on the samples before and after sintering. After sintering, the results showed a significant improvement in...

The general-purpose powder diffractometer beamline (BL2-1) at the Stanford Synchrotron Radiation Lightsource (SSRL) is described. The evolution of design and performance of BL2-1 are presented, in addition to current operating specifications, applications and measurement capabilities. Recent developments involve a robotic sample changer enabling hi...

This research focuses on reducing the manufacturing cost of metal components through “hybrid additive manufacturing”, i.e. laser powder bed fusion (LPBF) carried out on a pre-machined functional base. By incorporating part of the final component's geometry (such as cooling channels) in the base, the cost for large and bulky products can be minimize...

In this paper, snail shell powder was used an adsorbent for safranine dye due to its low cost, high efficiency and high adsorption capacity. Experiments were conducted at a temperature of 298 K to find out the effect of pH, concentration, weight, ionic strength and equilibrium time. Also, the best conditions for the adsorption of Safranin dye were...

Laser powder bed fusion of metals offers important advantages for several industrial applications. Research work is needed to improve the production rates while reducing the likelihood of defects compromising part quality. It is feasible to improve production rates by fabricating parts with thicker layers, but this often leads to an increased prese...

The present study concerns the development of titanium carbide (TiC) dispersed titanium matrix composite by laser surface processing of titanium with titanium and carbon (in the weight ratio of 90:10 and 50:50). Laser surface processing has been carried out using a 4 kW continuous wave (CW) Nd:YAG laser with a beam diameter of 2 mm, at varied appli...

The seafood industry is economically important and generates high income. Therefore, the government has a policy to push the Thai food industry into a global food hub. This is a good opportunity for Thai seafood industries throughout the supply chain. In increasing the quantity and value of the export of Thai aquatic products. The fish sauce market...

The single crystalline growth and characterization of Gd doped Sb2Te3 topological insulator is discussed in this article. The single crystals of Sb2Te3 and Gd0.25Sb1.75Te3 are synthesized by solid-state reaction route via self-flux method. The crystalline nature and structural details of the as grown crystals are investigated through X-ray diffract...

A series of SrZrO3:xHo³⁺ (x = 0.01, 0.03, 0.05, 0.07, 0.09, and 0.11 mol) perovskite phosphors have been synthesized by using the sol–gel technique. The structural and optical characteristics of the prepared phosphors have been investigated through powder XRD, FT-IR, UV-visible diffuse reflectance, and photoluminescence analysis. The photoluminesce...

Citation: Abedi, M.; Moskovskikh, D.; Nepapushev, A.; Suvorova, V.; Wang, H.; Romanovski, V.

The effect of mechanical alloying on the development of Ni–Al–Ti–Mn–Co–Fe–Cr high entropy alloys (HEAs) utilizing the spark plasma sintering (SPS) method is the main goal of this study. A bulk sample was fabricated using SPS after the alloys were mixed for 12 h. Thermodynamic simulation, X-ray diffraction, scanning electron microscopy, nanoindentat...

A novel non-centrosymmetric NdSr 4 O(BO 3) 3 borate and solid solutions of Nd(Ca 1−x Sr x) 4 O (BO 3) 3 (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.7, 1.0) were synthesized by solid-state reactions as well as crystallization from a melt. The crystal structures of the Nd(Ca 1−x Sr x) 4 O(BO 3) 3 solid solutions with x = 0.2, 0.5 and 1.0 were determined fro...

The understanding of granule growth mechanisms and the effects of formulation and operating conditions over product quality and process performance in fluidized bed co-melt granulation is nowadays of great interest. In this sense, this work systematically studies the combined effects of binder content (W_PEG) and fluidization air flowrate (F_A) and...

Flake-shaped FeSiCr (FFSC) material is expected to be a promising microwave absorbent due to its excellent magnetic properties and environmental resistance. By introducing carbon-based materials through suitable coatings, the electromagnetic parameters and energy loss can be tuned to improve the performance of FFSC. A facile solution-blending metho...

Laser-based Powder Bed Fusion (LPBF) of oxide ceramics enables fabrication of objects with complex three-dimensional shapes. However, mechanical properties of dense LPBF-manufactured ceramics are poor due to large amount of structural defects. Here, we perform the operando tomographic microscopy during LPBF of a magnetite-modified alumina to gain a...

This work reports a simple, low-cost, and environmentally friendly method to synthesize Ni-Co alloy nanoparticles (Ni-CoNPs) onto a glassy carbon electrode, GCE, and its use towards the efficient urea electrooxidation in basic aqueous media. Ni-CoNPs were directly electrodeposited onto the GCE surface, GCE/Ni-CoNPs by a single potentiostatic step,...

The ever-evolving construction sector demands technological developments to provide consumers with products that meet stringent technical, environmental, and economic requirements. Self-compacting cementitious mixtures have garnered significance in the construction market due to their enhanced compaction, workability, fluidity, and mechanical prope...

The relationship between pulsed laser processing parameters and epitaxial growth of alloy is essential to additive manufacturing technology in repairing and manufacturing nickel-based single crystal (SX) superalloys. In this paper, orthogonal experiments of Laser Direct Energy Deposition (DED-L) process have been designed to optimize the process fo...

The average sizes L¯i, and their dispersion Wi along the i-th axis, of crystallites in powders are used to determine X-ray diffraction sizes, Di XRD, averaged over crystallite columns within the BWA method. Numerical calculations have been carried out for an orthorhombic lattice of crystallites, such as LiFePO4, NMC, having a Lamé’s g-type superell...

This study aimed to assess the effectiveness of utilizing a tannin-based natural brown colorant from neem bark for dyeing wool under microwave treatment, specifically evaluating its coloring efficiency. The colorant was extracted in a methanol solution that had been acidified both before and after being subjected to microwave treatment for up to 6...

In this paper, a brake cylinder coating comprising composite material of Fe3Al and Cr3C2 mixed powder was prepared by laser cladding onto carbon structural steel. The microstructure of the cladding materials was investigated through X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and transmission e...

Porous carbon is an emerging material for the capture of CO2 from point sources of emissions due to its high structural, mechanical, and chemical stability, along with reusability advantages. Currently, research efforts are mainly focused on high- or medium-pressure adsorption, rather than low-pressure or DAC (direct air capture) conditions. Highly...

Kesulitan penggiat usaha ekonomi mandiri dalam memanfaatkan pasca panen jahe merah menjadi produk siap konsumsi. Penggunaan tenaga manusia di keseluruhan unit proses menjadi perpanjangan waktu dan penekanan jumlah bahan yang akan diproses. Hal ini dialami oleh mitra JAMER di kabupaten Karawang yang mampu memproses jahe merah di bawah 5 kg per hari....

Solanaceous vegetable play important role in vegetable production and they are integral part of human diet. Pruning and training is an important factor necessary in growing vegetables which leads to early fruiting, increase in the qualitative and quantitative crop yield and ease of fertilizing operation through solution spray and powder spray. Prun...

SUPPLIER FOR HAGER WERKEN EMBALMING POWDER +27786655025 / WHATSAPP Hager Werken Embalming Compound Pink Powder we advise on prices and uses +27786655025 both pink and white hot radioactive from Germany Embalming compound in powder form both PINK and WHITE Radio active and not (HOT and not HOT) its all available. Our prices are affordable and we su...

Smart robotic devices remotely powered by magnetic field have emerged as versatile tools for wide biomedical applications. Soft magnetic elastomer (ME) composite membranes with high flexibility and responsiveness are frequently incorporated to enable local actuation for wireless sensing or cargo delivery. However, the fabrication of thin ME membran...

To clarify the Ni species of NiO/SiO2-Al2O3 catalysts that are active for ethylene oligomerization, 18 types of NiO/SiO2-Al2O3 were prepared using three Ni-loading methods (i.e., ion-exchange, impregnation, and homogeneous precipitation), with different Ni-loadings (1–20 wt%), and examined with respect to their structure and catalytic activity for...

Copper trihydroxychlorides, which are known as "bronze disease", are dangerous corrosion products that compromise the stability and conservation of bronze sculptures. Here, we performed artificial patina corrosion experiments on quaternary bronze (Cu-Zn-Sn-Pb) to examine the corrosion behavior of the chloride patina commonly found in bronze objects...

WC 3%-‫بواسطة‬ ‫افيت‬ ‫غر‬ (‫افيت‬ ‫الغر‬ ‫اكيز‬ ‫تر‬ ‫زيادة‬ ‫تأثير‬ ‫اسة‬ ‫در‬ ‫تم‬ ‫املساحيق.‬ ‫ميتالورجيا‬ 0 , 2 ,% 4 ,% 6 ,% 8)% ‫تقل‬ ‫التلبيد‬ ‫كثافة‬ ‫ان‬ ‫النتائج‬ ‫أوضحت‬ ‫للمركبات.‬ ‫ارية‬ ‫الحر‬ ‫واملوصلية‬ ‫التلبيد‬ ‫كثافة‬ ‫على‬ (‫بمعدل‬ ‫افيت‬ ‫الغر‬ ‫تركيز‬ ‫زيادة‬ ‫مع‬ 16.75 ‫بمقدار‬ ‫تقل‬ ‫ارية‬ ‫الحر‬ ‫املوصلية‬ ‫وكذلك‬)% (25.90...

Additive manufacturing offers significant design freedom and the ability to selectively influence material properties. However, conventional processes like laser powder bed fusion for metals may result in internal defects, such as pores, which profoundly affect the mechanical characteristics of the components. The extent of this influence varies de...

Aims and objectives: The clinical efficacy of different forms of denture adhesives have been inconsistent among studies with unclear differences among them. The aim of this study is to evaluate the masticatory efficiency and satisfaction of complete denture wearers without and with the use of two different forms of commercially available denture ad...

Reviewing the research on reinforced reactive powder concrete’s bonding properties from three perspectives: bonding test methods, influencing factors of bonding properties and bonding stress-slip constitutive relationship. For the central pull-out test, steel bar and concrete’s bond stress state deviates from the actual engineering structure, and t...

Briquette blending aims to increase coke strength by increasing the bulk density of the coal charge by blending in high-density briquettes. This technique tends to decrease the bulk density of the powder coal portion of the coal blend. In this study, we attempted to elucidate the mechanism behind this decrease in the bulk density of the powder coal...

The perception of retailers is crucial for consumer trust, brand reputation, and competitive advantage. It influences customer choices, employee engagement, investor confidence, and supplier relationships, ultimately impacting the success and sustainability of retail businesses. This research study explored the retailers' perception towards curry p...

Long-lasting phosphors, SrAl2O4: Eu, Dy and CaAl2O4: Eu, Nd, have been prepared by a short process using the spark plasma sintering method. The raw oxide powders were mixed for 5 min using a high-energy mill. Subsequently, solid-state reaction and sintering were simultaneously performed for approximately 20 min using a spark plasma sintering appara...

The work presents a mathematical model of a thermogravimetric curve for the growth and simultaneous sublimation of scale on a metal or alloy surface. Reduction of the reaction area as a result of the formation of oxides of alloying elements (for obtaining the basic oxide) is considered for the alloy. For metals, the case where this area is increase...