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Artykuły w czasopismach na temat „Metal Powder Report”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Dowson, A. G. (Gordon). "Fifty years of Metal Powder Report." Metal Powder Report 50, no. 12 (1995): 12–13. http://dx.doi.org/10.1016/0026-0657(95)80017-4.

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Bland, Stewart. "A new look for Metal Powder Report." Metal Powder Report 70, no. 1 (2015): 1. http://dx.doi.org/10.1016/j.mprp.2014.12.055.

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Kim, Sang Youl, Norbert Babcsán, Duck Kyu Ahn, Yeong Hwan Song, and Bo Young Hur. "Corelationship Between Powder Metallurgy and Casting Method Using SiC Powder for Metal Foam." Materials Science Forum 534-536 (January 2007): 945–48. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.945.

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Metal foams are not easy to use as materials as their manufacturing process involves all three, solid, liquid and gaseous phases occurring simultaneously at varying temperatures and moreever the morphology of the solidified foam is quite complex. There has not been any report on the stabilization of metal foams. To compare the stabilisation of metal foams using a different method, powder metallurgy and casting method using SiC and Ca alloy particle are required. Our investigation results showed deeply etched valleys with high oxygen content and secondary phases attached to line-shaped pores wi

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4

Komarneni, Sridhar, Rajyalakshmi Pidugu, Qing Hua Li, and Rustum Roy. "Microwave-hydrothermal processing of metal powders." Journal of Materials Research 10, no. 7 (1995): 1687–92. http://dx.doi.org/10.1557/jmr.1995.1687.

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Novel microwave-hydrothermal processing has been developed by us recently for the synthesis of a wide variety of ceramic powders. Herein, we report the use of microwave-hydrothermal processing to synthesize several metal powders such as Cu, Ni, Co, and Ag by reducing their corresponding metal salts or hydroxides with ethylene glycol. Metal powders have been produced extremely rapidly a (few minutes) by microwave catalysis. The kinetics of metal powder synthesis have been increased by at least an order of magnitude by microwave-hydrothermal processing compared to the conventional refluxing proc

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5

Wang, Chuansheng, Ning Cai, Dewei Zhang, et al. "Preparation of optimum degreasing–sintering process for metal–polymer blending low temperature 3D printing." Rapid Prototyping Journal 25, no. 3 (2019): 515–29. http://dx.doi.org/10.1108/rpj-03-2018-0071.

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Purpose This purpose of this study was to develop a 3D printer based on powder particle. The best degreasing and sintering process of a blank body was investigated to obtain a metal product with high precision and high surface finish. This process will greatly reduce the difficulty and cost of forming a complex metal product with high application value. Design/methodology/approach Stainless steel powder and polymer materials were mixed using a rubber mixing machine. The powders were granulated to prepare a mixed material. A powder feed 3D printer was used at low temperature (about 200°C) to pr

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6

Hatti, Gururaj, Gangarekaluve J. Naveen, Vishwanath Koti, et al. "Green metal matrix composites: a multi-faceted study on Al alloy composites with egg shell powder and silicon carbide as reinforcements." Metallurgical Research & Technology 121, no. 6 (2024): 610. http://dx.doi.org/10.1051/metal/2024086.

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This article is about Green Metal Matrix Composites (GMMCs) produced with aluminum alloys and reinforcements include silicon carbide and eggshell powder. The GMMCs offer a new approach to sustainable materials through the use of ecofriendly reinforcements. A novel class of composites results from a combination of silicon carbide, which has superior mechanical properties, and agricultural waste based eggshell powder. Furthermore, eggshell powder mainly comprised of calcium carbonate lowers its density as well as serves as long-term reinforcement. Silicon carbide enhances their mechanical proper

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7

Li, Jiwen, Douqin Ma, Jingpei Xie, Fang Fang, Liujie Xu, and Shizhong Wei. "A novel high density W-30Cu alloy prepared via hydrothermal synthesis-co-reduction and canned hot extrusion methods." Metallurgical Research & Technology 116, no. 1 (2018): 113. http://dx.doi.org/10.1051/metal/2018034.

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We report herein the successful synthesis of in situ nanocomposite W-30Cu as powder via the hydrothermal approach combined with the co-reduction process, having sodium tungstate and copper nitrate as starting materials. The cold isostatic pressing, vacuum sintering and canned hot extrusion technology have been employed in order to improve the properties of the W-30Cu alloy. The impact of preparation’s methodologies on the microstructure, mechanical and physical properties have been investigated by the means of X-ray diffractometry (XRD); scanning electron (SEM); field emission electron (FE-SEM

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Chen, Wei Ping, Dong Hui Yang, Jun Lu, et al. "Fabrication of Zn Alloy Foam via Powder Metallurgical Approach." Materials Science Forum 849 (March 2016): 819–24. http://dx.doi.org/10.4028/www.scientific.net/msf.849.819.

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Powder metallurgical (PM) route is one of the methods for metal foam fabrication. In this paper, we report the fabrication of Zn alloy foams with 0~50wt.% Mg via powder metallurgical approach by using CaCO3 as the blowing agent. The fabrication process included 5 steps: powders mixing, cool-pressing, heat treatment, hot-pressing, foaming and cooling. The effects of Mg addition, foaming temperature on the foaming process were discussed. Finally, the compressive behavior of Zn alloy foam was evaluated.

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9

Escano, Luis I., Niranjan D. Parab, Qilin Guo, et al. "An instrument for in situ characterization of powder spreading dynamics in powder-bed-based additive manufacturing processes." Review of Scientific Instruments 93, no. 4 (2022): 043707. http://dx.doi.org/10.1063/5.0076235.

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In powder-bed-based metal additive manufacturing (AM), the visualization and analysis of the powder spreading process are critical for understanding the powder spreading dynamics and mechanisms. Unfortunately, the high spreading speeds, the small size of the powder, and the opacity of the materials present a great challenge for directly observing the powder spreading behavior. Here, we report a compact and flexible powder spreading system for in situ characterization of the dynamics of the powders during the spreading process by high-speed x-ray imaging. The system enables the tracing of indiv

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Chicinaş, Horea Florin, Darius Ovidiu Jucan, Glad Contiu, and Cătălin Popa. "Effect of Aqueous Milling on the Total Carbon Content of Hard Metal Powders." Advanced Engineering Forum 42 (September 7, 2021): 3–8. http://dx.doi.org/10.4028/www.scientific.net/aef.42.3.

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Materials consisting of a hard phase, usually WC, and a tough binder, traditionally Co, form the most successful class of composite materials, also known as Hard Metals (HM) or Cemented Carbides. Powder metallurgy routes are employed generally for the production of such [1]. The typical processing route of such materials involves mixing the components, kneading and consolidation. Alcohols, alkanes and alkenes are commonly used to limit any excessive heating and oxidation of powders during mixing the components. In this study, we report the results of milling in a more environmentally friendly

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11

Duo, Jia, Fangming Jin, Yuanqing Wang, et al. "NaHCO3-enhanced hydrogen production from water with Fe and in situ highly efficient and autocatalytic NaHCO3reduction into formic acid." Chemical Communications 52, no. 16 (2016): 3316–19. http://dx.doi.org/10.1039/c5cc09611a.

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Ikeo, Naoko, Hidetsugu Fukuda, Aira Matsugaki, et al. "3D Puzzle in Cube Pattern for Anisotropic/Isotropic Mechanical Control of Structure Fabricated by Metal Additive Manufacturing." Crystals 11, no. 8 (2021): 959. http://dx.doi.org/10.3390/cryst11080959.

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Metal additive manufacturing is a powerful tool for providing the desired functional performance through a three-dimensional (3D) structural design. Among the material functions, anisotropic mechanical properties are indispensable for enabling the capabilities of structural materials for living tissues. For biomedical materials to replace bone function, it is necessary to provide an anisotropic mechanical property that mimics that of bones. For desired control of the mechanical performance of the materials, we propose a novel 3D puzzle structure with cube-shaped parts comprising 27 (3 × 3 × 3)

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13

Moorhouse, Saul J., Yue Wu, Hannah C. Buckley, and Dermot O'Hare. "Time-resolved in situ powder X-ray diffraction reveals the mechanisms of molten salt synthesis." Chemical Communications 52, no. 96 (2016): 13865–68. http://dx.doi.org/10.1039/c6cc08133a.

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We report the first use of high-energy monochromatic in situ X-ray powder diffraction to gain unprecedented insights into the chemical processes occurring during high temperature, lab-scale metal oxide syntheses.

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14

Skatkov, Leonid, Valeriy Gomozov, and Boris Bayrachniy. "Investigation of porosity and fractal properties of the sintered metal and semiconductor layers in the MDS capacitor structure." Science of Sintering 44, no. 1 (2012): 95–101. http://dx.doi.org/10.2298/sos1201095s.

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MDS capacitor (metal - dielectric - semiconductor) is a structure in which metal plate is represented by compact bulk-porous pellets of niobium sintered powder, and semiconductor plate - by pyrolytic layer of MnO2. In the present paper we report the results of investigation of microporosity of sintered Nb and pyrolytic MnO2 and also the fractal properties of semiconductor layer.

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15

SUGA, TAKEO, SEIJI ISODA, and TAKASHI KOBAYASHI. "Characterization and Electrical Conductivity of Dithallium Phthalocyanine (Tl2Pc)." Journal of Porphyrins and Phthalocyanines 03, no. 06 (1999): 397–405. http://dx.doi.org/10.1002/(sici)1099-1409(199908/10)3:6/7<397::aid-jpp146>3.0.co;2-u.

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Dithallium phthalocyanine ( Tl 2 Pc ) has been synthesized from pure Tl metal and o-phthalodinitrile. The isolated compound was characterized by elemental analysis, X-ray powder diffraction, electron diffraction and EDX spectroscopy. Based on these results, the compound synthesized by the present method was concluded to be Tl 2 Pc . The electrical conductivity of this powdery Tl 2 Pc was measured and it exhibited the semiconductive property, in contrast with a previous report.

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16

Qing, Yongquan, Kuaikuai Guo, Chen Liu, et al. "Impact of Atomization Pressure on the Particle Size of Nickel-Based Superalloy Powders by Numerical Simulation." Materials 15, no. 9 (2022): 3020. http://dx.doi.org/10.3390/ma15093020.

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Vacuum induction melting gas atomization (VIGA) has evolved as an important production technique of superalloy powders used in additive manufacturing. However, the development of powder preparation techniques is limited because the crushing process of gas-atomized metal melt is difficult to characterize by conventional experimental methods. Herein, we report the application of computational fluid dynamics to simulate the breaking behavior of droplets in the process of preparing nickel-based superalloy powders by VIGA, as well as the results on the effect of gas pressure on the atomization proc

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17

Osada, Toshiko, Yoshitomo Tanaka, Hideshi Miura, Terukazu Tokuoka, and Takao Nishioka. "High-Densification for Ferrous Soft Magnetic Powder by Metal Injection Molding - 2nd Report." Journal of the Japan Society of Powder and Powder Metallurgy 57, no. 6 (2010): 387–91. http://dx.doi.org/10.2497/jjspm.57.387.

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18

Ke, Linda, Haihong Zhu, Jie Yin, and Xinbing Wang. "Effects of peak laser power on laser micro sintering of nickel powder by pulsed Nd:YAG laser." Rapid Prototyping Journal 20, no. 4 (2014): 328–35. http://dx.doi.org/10.1108/rpj-09-2012-0084.

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Purpose – The purpose of this paper is to report the influence of the peak laser power on laser micro sintering 4-μm nickel powder using Q-switched 1064-nm Nd:YAG laser. Design/methodology/approach – Experimental study has been performed. Nickel powder with grain size of 4 μm has been utilized. A Q-switching duration of 20-25 μs and rate of 20-40 kHz have been used. Findings – The peak power intensity is so high that the metal particles and molten pool are blown away, leading to laser micro sintering not being successfully proceeded. The scanning line obtained by continuous-wave (CW) laser loo

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19

Md, Zia Arzoo, Hassan Mozammil, and A.K.Madan. "Review on Spray Powder Process of Additive Manufacturing." Recent Trends in Automation and Automobile Engineering 4, no. 1 (2021): 1–11. https://doi.org/10.5281/zenodo.4629049.

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<em>As in Today’s fast-paced growing world, all technologies are continuously advancing in every field to increases performance one such advancement in the manufacturing sector is additive manufacturing which is one of the recent technology and it’s expected to have a market reach of 26.68 billion dollars by 2027 growing at a rate of 14.4%  according to report by reports and data. Additive manufacturing is the process of combining material to make objects by layer addition from the 3D CAD model. It is the opposite of subtractive manufacturing and it can produce products with g

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Rogers, Samuel, Matthew Dargusch, and Damon Kent. "Impacts of Temperature and Time on Direct Nitridation of Aluminium Powders for Preparation of AlN Reinforcement." Materials 16, no. 4 (2023): 1583. http://dx.doi.org/10.3390/ma16041583.

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Aluminium nitride (AlN) is an important technical ceramic with outstanding strength and thermal conductivity that has important applications for advanced heat sink materials and as a reinforcement for metal-based composites. In this study, we report a novel, straightforward and low-cost method to prepare AlN powder using a vacuum tube furnace for the direct nitridation of loose aluminium powder at low temperatures (down to 500 ∘C) under flowing high-purity nitrogen. Small amounts of magnesium powder (1 wt.%), combined with aluminium, promote nitridation. Here, we characterise the effects of ti

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21

Tayebi, Leyla, Rahmatollah Rahimi, and Mahboubeh Rabbani. "Synthesis of a Novel Porphyrin-Based Metal–Organic Framework (Co-Por MOF)." Proceedings 41, no. 1 (2019): 83. http://dx.doi.org/10.3390/ecsoc-23-06483.

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In this study, a novel porphyrin-based metal–organic framework (Co-Por MOF) was successfully synthesized by a simple one-step solvothermal method. We report a metal–organic framework based on the covalent interaction of an organic linker, 5,10,15,20-tetrakis(4-carboxyphenyl) porphyrin (TCPP) with cobalt clusters. The properties of this material were analyzed by powder X-ray diffraction (XRD), ultraviolet visible adsorption spectroscopy (UV–Vis), Fourier-transform infrared spectroscopy (FTIR), and differential reflectance spectroscopy (DRS).

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H. Jasim, Ruaa, Ahmed A. Al-Tabbakh, and Sinan M. Hasan. "Improvement of the Solar-Thermal Characteristics of the Flat-Plate Collector Using a Composite Coating." Al-Nahrain Journal of Science 24, no. 1 (2021): 24–29. http://dx.doi.org/10.22401/anjs.24.1.05.

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A commercially available matt black paint is used as the primary component of a composite coating for low-temperature flat collector systems. The composite coating is composed of the paint, carbon black powder (CBP) and lithium metal oxide (LMO) powder. The CBP and LMO powders are added on the top of the primary paint to improve the solar-thermal conversion characteristics of the collector. The optical and solar-thermal conversion characteristics of these coatings are investigated by means of optical microscopy, optical spectrophotometry, total reflectance measurement, and the measurement of t

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Dzakpasu, Cyril Bubu, Myung-Hyun Ryou, and Yong Min Lee. "Effect of Carbon Nanotubes on the Electrochemical Performance of Li Powder Composite Anodes." ECS Meeting Abstracts MA2022-02, no. 4 (2022): 427. http://dx.doi.org/10.1149/ma2022-024427mtgabs.

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To achieve the high energy density of lithium secondary batteries, the Li metal anode with a high theoretical capacity (3860 mAh g-1) and the lowest electrochemical potential (-3.04 vs. SHE) has attracted attention. However, Li metal is plagued with challenges such as irregular dendritic growth during cycling and low Coulombic efficiency (CE), which hinder its commercialization as an anode. Li metal powder (LMP) offers a solution to these problems by enlarging the surface area resulting in a lower effective current density. However, the commercial LMP passivated by Li2CO3 layer on the surface

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Chintada, Shoba, Siva Prasad Dora, and Dorathi Kare. "An overview on the microstructure and mechanical properties of sintered aluminum-based composites." Metallurgical and Materials Engineering 28, no. 1 (2022): 1–16. http://dx.doi.org/10.30544/687.

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Sintered composites have revolutionized as a thermal treatment to consolidate a wide range of engineering materials where the transition of powders takes place thermally in a thermodynamical equilibrium state with a decrease in free surface energy in materials owing to their specific capability. Sintering aids in providing effective bonding between the reinforced powder particles. However, the inadequate understanding of the sintering mechanism may limit the practical application of a few materials such as aluminum metal matrix composites. In addition to the rapid growth of various sintering r

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Jiang, Cho Pei, M. Fahrur Rozy Hentihu, Tzu Yi Lei, and Shyh Yuan Lee. "Three-Dimensional Slurry Printing Technology in Ceramic and Metal Application." Solid State Phenomena 311 (October 2020): 21–26. http://dx.doi.org/10.4028/www.scientific.net/ssp.311.21.

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Vat photopolymerization is one of additive manufacturing and also known as photo-curable three-dimensional printing technology. It uses light energy with the proper wavelength to expose on the liquid photo-curable resin inducing the photopolymerization process and resulting in solidification layer-by-layer. The building method is classified into two ways: free-surface and constrained-surface. The advantage and disadvantage of both methods are described and analysed according to the different material property and requirement. The basic composition for photo-curable resin consists of photo-init

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Ethiraj, Jayashree, Vinayagam Surya, Parasuraman Selvam, and Jenny G. Vitillo. "Water-Driven Structural Transformation in Cobalt Trimesate Metal-Organic Frameworks." Energies 14, no. 16 (2021): 4751. http://dx.doi.org/10.3390/en14164751.

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We report on the synthesis and the characterization of a novel cobalt trimesate metal-organic framework, designated as KCL-102. Powder X-ray diffraction pattern of KCL-102 is dominated by a reflection at 10.2° (d-spacing = 8.7 Å), while diffuse reflectance UV-Vis spectroscopy indicates that the divalent cobalt centers are in two different coordination geometries: tetrahedral and octahedral. Further, the material shows low stability in humid air, and it transforms into the well-known phase of hydrous cobalt trimesate, Co3(BTC)2·12H2O. We associated this transition with the conversion of the tet

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Greiwe, Magnus, Maximilian Krause, Oliver Osters, Alma Dorantes, Michele Piana, and Tom Nilges. "Zirconium Transition Metal (Poly)antimonides – Syntheses, Characterization and Electrochemical Properties." Zeitschrift für Naturforschung B 68, no. 9 (2013): 979–86. http://dx.doi.org/10.5560/znb.2013-3163.

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Herein we report on the syntheses, crystal structures and first electrochemical characterizations of ternary zirconium transition metal (poly)antimonides Zr2TSb3 (with T = Cu, Pd) and Zr3TSb7 (with T = Ni, Pd). The compounds were synthesized by arc-melting, followed by an annealing procedure at elevated temperatures. Phase analysis and structure analysis were performed by powder and singlecrystal measurements. The electrochemical properties of all compounds were measured in half cells against lithium to test their potential as anode materials for Li batteries. The Zr3TSb7 phases show metallic

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Mangano, Carlo, Adriano Piattelli, Susana d'Avila, et al. "Early Human Bone Response to Laser Metal Sintering Surface Topography: A Histologic Report." Journal of Oral Implantology 36, no. 2 (2010): 91–96. http://dx.doi.org/10.1563/aaid-joi-d-09-00003.

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Abstract This histologic report evaluated the early human bone response to a direct laser metal sintering implant surface retrieved after a short period of healing. A selective laser sintering procedure using a Ti-6Al-4V alloy powder with a particle size of 25–45 µm prepared this surface topography. One experimental microimplant was inserted into the anterior mandible of a patient during conventional implant surgery of the jaw. The microimplant and surrounding tissues were removed after 2 months of unloaded healing and were prepared for histomorphometric analysis. Histologically, the peri-impl

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FURUMOTO, Tatsuaki, Takashi UEDA, Naoto KOBAYASHI, Akira HOSOKAWA, Ryutaro TANAKA, and Satoshi ABE. "Study on the Sintering Characteristics of the Mixed Metal Powder with Yb : fiber laser (2nd Report)." Journal of the Japan Society for Precision Engineering 76, no. 2 (2010): 173–77. http://dx.doi.org/10.2493/jjspe.76.173.

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Kotinda, Ana Paula Samy Tanaka, Antoine Guilloux, Sylvie Breton, et al. "Hemostatic powder for the management of hemorrhage from esophageal self-expanding metal stents: A case report." Endoscopy 56, S 01 (2024): E384—E385. http://dx.doi.org/10.1055/a-2302-4686.

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Rangaraj, Lingappa, Canchi Divakar, and Vikram Jayaram. "Processing of Refractory Metal Borides, Carbides and Nitrides." Key Engineering Materials 395 (October 2008): 69–88. http://dx.doi.org/10.4028/www.scientific.net/kem.395.69.

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Transition metal borides, carbides and nitrides are candidates for very high temperature applications. A review of various processing techniques to fabricate dense monolithic and composite materials is presented. In particular, we focus on reactive hot pressing (RHP) which allows synthesis and densification to be achieved simultaneously. We report the RHP of composites in the Ti-B-N, Zr-B-C and Zr-B-Si-C systems using the reactions of Ti/BN, Zr/B4C (Si, SiC particulate) powder mixtures at moderate pressures and temperatures. Substantial reductions in processing temperature may be realized from

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Lefton, Jonathan B., Kyle B. Pekar, Daniel Sethio, Elfi Kraka, and Tomče Runčevski. "Crystal structure of 1-propanethiol–Co2(dobdc) from laboratory X-ray powder diffraction data." Powder Diffraction 35, no. 1 (2020): 3–6. http://dx.doi.org/10.1017/s0885715620000081.

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Laboratory X-ray powder diffraction was used to solve and refine the crystal structures of appended guest molecules within the pores of metal–organic frameworks (MOFs). Herein, we report the crystal structure of 1-propanethiol adsorbed in the pores of Co2(dobdc) (dobdc4– = 2,5-dioxido-1,4-benzenedicarboxylate, MOF-74). Soaking the activated MOF in neat 1-propanethiol resulted in the formation of 1-propanethiol–Co2(dobdc). The thiol appendant MOF maintained the crystal symmetry, with a rhombohedral space group R-3 and unit-cell parameters a = 25.9597(9) Å, c = 6.8623(5) Å, and V = 4005.0(4) Å3.

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del Rio, D. C., D. Juul Jensen, T. Yu, and N. S. Tiedje. "Laboratory-scale gas atomizer for the manufacturing of metallic powders." IOP Conference Series: Materials Science and Engineering 1249, no. 1 (2022): 012034. http://dx.doi.org/10.1088/1757-899x/1249/1/012034.

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Abstract Metallic powders for additive manufacturing (AM) processes are primarily produced by gas atomization, which consists of three steps: melting, atomization and cooling. In the present work, we report on the refurbishing of a laboratory-scale gas atomizer. The equipment facilitates small-scale atomization, useful for developing powders tailored specifically to metal AM processes (e.g. binder jetting, laser powder-bed fusion and direct energy deposition). The refurbished atomizer is operated by an in-house measurement and control system, fully equipped with pressure, oxygen, gas-flow and

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Kang, Dongyoon, Dahee Jin, Cyril Bubu Dzakpasu, Jiwon Han, Myung-Hyun Ryou, and Yong Min Lee. "Multi-Functional AgNO₃ Preplanted in Li Metal Powder Electrodes." ECS Meeting Abstracts MA2022-02, no. 4 (2022): 428. http://dx.doi.org/10.1149/ma2022-024428mtgabs.

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Li metal powder (LMP) is very promising in practically fabricating thin Li electrodes for high-energy-density Li metal batteries (LMBs), because it allows not only conventional slurry coating but also co-use of functional additives. Also, the LMP has several times higher surface area than that of the Li foil with tens of micrometers, which reduces the local current density and suppresses Li dendritic growth. However, the uneven and resistive protection layer on the LMP surface could lead to the non-uniform composition in solid electrolyte interphase (SEI), thereby resulting in the localized Li

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Nguyen, Hien Thi Thu, Hai Thi Le, Trang Thi Minh Nguyen, Hien Minh Nguyen, and Thi Tan Pham. "Hydrothermal synthesis of gold nanoparticles and metal organic framework hybrid structure." Science and Technology Development Journal - Natural Sciences 2, no. 2 (2019): 95–101. http://dx.doi.org/10.32508/stdjns.v2i2.740.

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We report a hydrothermal synthesis of a hybrid structure between gold nanoparticles and a metal organic framework, ZIF-8 (abbreviated as Au@ZIF-8). Au nanoparticles encapsulated in polyvinylpyrrolidone (PVP) was employed as seeds to grow the framework of ZIF-8. We controlled the position and concentrations of Au nanoparticles on ZIF-8 crystal by adjusting the volume of Au nanoparticles dissolved in DI water during the growth of ZIF-8. Morphology, structure, distribution of the hybrid structure were investigated by transmission microscope, powder xray diffraction, and diffuse reflectance UV-Vis

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Marina, M., K. Alir, W. Rahman, Z. Nooraizedfiza, Mohd Asri Selamat, and M. Z. M. Zamzuri. "Characteristics of Fe-Yttria Composites Fabricated by Powder Metallurgy Method." Advanced Materials Research 626 (December 2012): 738–42. http://dx.doi.org/10.4028/www.scientific.net/amr.626.738.

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This study is focused on fabricating and characterizing iron (Fe) composites prepared by powder metallurgy route reinforced with varying weight of Yttria (Y2O3). Composites were prepared based on 5 wt. % to 15 wt. % of reinforcement powder with particle size ranging from 1-10µm. Pure Fe matrix composites were also prepared for comparison purpose. This paper will report the microstructure, bulk density and micro hardness values of the composites. Powder characterization and microstructures of the composites were examined using Scanning Electron Microscope (SEM) which indicated homogenous distri

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Samal, Sneha, and Ignazio Blanco. "An Overview of Thermal Plasma Arc Systems for Treatment of Various Wastes in Recovery of Metals." Materials 15, no. 2 (2022): 683. http://dx.doi.org/10.3390/ma15020683.

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Thermal plasma systems are being used for the recovery of metals from complex waste and minerals. The latter contain multiphase metals in various forms that are extremely tedious to separate. Thermal plasma arc melts the waste and minerals for qualitative plasma products for powder industries. In this overview, we briefly report a description of the various thermal plasma systems and their uses in recovering metal from metal-containing materials in the form of waste or minerals. Various plasma arc systems, such as transferred, nontransferred, and extended arc, have enabled the development of a

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Kunieda, Yoshihiko, Hiroshi Shimofuruya, Tomoyuki Tanigawa, and Yasuyuki Ito. "Heating Behaviors of Powdered Metal Silicon Compact Under Microwave Irradiation." Materials Science Forum 638-642 (January 2010): 2080–84. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.2080.

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The use of microwave heating has now been applied to a wide variety of industrial fields. Especially, the use of microwave energy for the firing process of the advanced ceramics has been reportedly found to offer significant advantages compared to the conventional thermal heating. Generally, in the volume production, we use the suscepor, which is the pyrogenetic substance to be heated the specimens externally and to play a very important role in firing ceramics. Recently, we found out that the powdered metal silicon compact is one of the good candidates as susceptor materials. However, its mic

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SHELKE, P. N., Y. B. KHOLLAM, P. N. PABREKAR, et al. "SYNTHESIS AND CHARACTERIZATION OF Co3O4 POWDERS FOR HUMIDITY SENSING." International Journal of Modern Physics: Conference Series 06 (January 2012): 197–202. http://dx.doi.org/10.1142/s2010194512003170.

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In last few decades, great deal of research efforts were directed towards the development of miniaturized gas-sensing devices, particularly for toxic gas detection and for pollution monitoring. Though various techniques are available for gas detection, solid state metal oxides offer wide spectrum of materials with their high sensitivities for the detection of different gaseous species. In this paper, we report the humidity sensing behavior of cobalt oxide ( Co 3 O 4) pellets. The Co 3 O 4 powder was prepared from the precipitation of CoSO 4 using NaOH solution. This as-prepared powder was heat

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Assenhöj, Maria, Ann-Charlotte Almstrand, Stefan A. Ljunggren, Anna-Carin Ohlin, and Helen Karlsson. "49 Exposure Assessment and Health Surveys at Metal Additive Manufacturing Facilities." Annals of Work Exposures and Health 67, Supplement_1 (2023): i90—i91. http://dx.doi.org/10.1093/annweh/wxac087.221.

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Abstract Additive manufacturing (AM) is the process of building parts from 3D model data by joining materials. AM includes different techniques, such as binder jetting and powder bed fusion which uses metal powder as feedstock. Knowledge regarding exposure-related health risks in metal AM environments is still limited. Herein, we report emission data from 8 different AM companies along with health examinations of 39 controls and 48 additive manufacturing machine users (AMMU). Exposure assessment of dust and metals was performed through stationary and personal sampling of total and inhalable du

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Wong-Ng, Winnie, and J. Yang. "International Centre for Diffraction Data and American Society for Metals database survey of thermoelectric half-Heusler material systems." Powder Diffraction 28, no. 1 (2013): 32–43. http://dx.doi.org/10.1017/s0885715612000942.

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Phase diagrams and X-ray powder diffraction patterns provide critical information for thermoelectric (TE) research. We have conducted a survey of phase diagrams and powder diffraction patterns of TE systems in the ASM (American Society for Metals) Metal/Alloy database and ICDD (International Centre for Diffraction Data) PDF (Powder Diffraction File), respectively, for their availability and crystal systems. In this report, we focus on TE materials that have the half-Heusler XYZ structure, and related compounds, based on a set of materials selection rules. We found that among 306 potential XYZ

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Panda, Jagannath, Soumya Prakash Biswal, Himanshu Sekhar Jena, Arijit Mitra, Raghabendra Samantray, and Rojalin Sahu. "Role of Lewis Acid Metal Centers in Metal–Organic Frameworks for Ultrafast Reduction of 4-Nitrophenol." Catalysts 12, no. 5 (2022): 494. http://dx.doi.org/10.3390/catal12050494.

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Metal–Organic Frameworks (MOFs) can be a good alternative to conventional catalysts because they are non-toxic and can be selective without compromising efficiency. Nano MOFs such as UiO-66 have proven themselves to be competitive in the catalytic family. In this study, we report the excellent catalytic behavior of UiO-66 MOF in the reduction of a model reaction: 4-Nitrophenol (4-NP) to 4-Aminophenol (4-AP) over MOF-5 (Zn-BDC) and MIL-101 (Fe-BDC). Nano UiO-66 crystals were synthesized by a hydrothermal process and characterized by Powder X-ray Diffraction, Diffused Reflectance UV-Vis spectros

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Grecchi, Francesco, Piero Antonio Zecca, Aldo Macchi, et al. "Full-Digital Workflow for Fabricating a Custom-Made Direct Metal Laser Sintering (DMLS) Mandibular Implant: A Case Report." International Journal of Environmental Research and Public Health 17, no. 8 (2020): 2693. http://dx.doi.org/10.3390/ijerph17082693.

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Direct Laser Metal Sintering (DLMS) is an additive manufacturing (AM) technique that is capable of manufacturing metal parts according to a three-dimensional (3D) design made using computer-assisted-design (CAD) software, thanks to a powerful laser beam that melts selectively micro-powder layers, one on top of the other, until the desired object is generated. With DMLS, it is now possible to fabricate custom-made titanium implants for oral and maxillofacial applications. We present the case of a 67-year-old woman diagnosed with a squamous cell carcinoma of the mandible. The patient underwent s

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Ayare, Pooja, Shawn Gregory, Typher Yom, Mark D. Losego, and Aaron Vannucci. "Using Atomic Layer Deposition (ALD) to Immobilize Molecular Catalysts on Solid Powder Supports." ECS Meeting Abstracts MA2022-02, no. 31 (2022): 1151. http://dx.doi.org/10.1149/ma2022-02311151mtgabs.

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While homogeneous molecular catalysts are valued for their high reaction specificity, they are not as easily recoverable at industrial scales as heterogeneous catalyst powders that can be rapidly separated from the reaction solution. Here, we will discuss a new approach using atomic layer deposition (ALD) to immobilize molecular catalysts onto heterogeneous powder supports to achieve this combination of selectivity and recoverability. In this presentation, we demonstrate applicability using a non-noble metal (nickel) molecular catalyst to do Suzuki carbon-carbon cross-coupling reactions. Due t

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Soundaranayaki, V., and A. Kulandaisamy. "Structural and Biological Studies on Transition Metal Complexes of 4-Aminoantipyrine Derivative." Asian Journal of Chemistry 32, no. 11 (2020): 2846–54. http://dx.doi.org/10.14233/ajchem.2020.22866.

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Novel tetra dentate Cu(II), Ni(II), Co(II), VO(II) and Zn(II) Schiff base complexes have been synthesized from salicylidene-4-iminoantipyrine and tyrosine. The synthesized Schiff base complexes was characterized by powder X-ray diffraction studies (XRD), scanning electron microscopy (SEM), FT-IR, ESR, 1H NMR, 13C NMR, UV-vis, molar conductance and magnetic susceptibility measurements. The general formula of complexes was confirmed as [ML] type [M = Cu(II), Co(II), Zn(II), Ni(II) and VO(II); L = C27H24N4O4]. Magnetic susceptibility, IR and UV-vis, spectral data showed that all the complexes hav

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Paradis, Linsea, Noor Ul-Huda Altaf, Jennifer Gray, Daudi Waryoba, and Ramakrishnan Rajagopalan. "Preparation of Soft Magnetic Composite Using Cold Sintering Technique." ECS Meeting Abstracts MA2024-01, no. 25 (2024): 1437. http://dx.doi.org/10.1149/ma2024-01251437mtgabs.

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Soft magnetic composites are powder metal products under development as an alternative to 2D laminates in electric motor applications. The 3D design of SMCs offers greater energy efficiency but poses a challenge to maintain adequate strength properties required for application. Soft magnetic composites are fabricated through compaction and heat treatment of iron particles coated with insulated coating to form a dense compact. The soft magnetic properties of the compact are affected by the properties of the iron powder, density of compact as well as the efficacy of forming uniform thin insulati

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Bäucker, Christian, Soeren Bauch, and Rainer Niewa. "Synthesis and Characterization of the Amidomanganates Rb2[Mn(NH2)4] and Cs2[Mn(NH2)4]." Crystals 11, no. 6 (2021): 676. http://dx.doi.org/10.3390/cryst11060676.

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We report the successful synthesis of Rb2[Mn(NH2)4] and Cs2[Mn(NH2)4] from ammonothermal conditions at 723 K and pressures above 850 bar. Both compounds were obtained single phase according to powder X-ray diffraction. The crystal structures were determined by single crystal X-ray diffraction. For Rb2[Mn(NH2)4] we have obtained the high-temperature phase. The structures are analyzed with respect to the earlier reported alkali metal amidomanganates. Upon heating in inert atmosphere Cs2[Mn(NH2)4] decomposes to manganese nitrides. IR spectroscopic results are reported.

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Lommel, Bettina, Annett Hübner, Birgit Kindler, et al. "Natural and enriched tungsten as target for heavy ion experiments." EPJ Web of Conferences 327 (2025): 01004. https://doi.org/10.1051/epjconf/202532701004.

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Tungsten is applied as target material for experiments in the field of nuclear spectroscopy. Typically, targets of a thickness range of 100 µg/cm² up to 1000 µg/cm² that can safely stand the irradiation by the intense heavy-ion beam over a substantially long period are requested. Natural tungsten is commercially available as thick foils and as sputtering targets. Enriched tungsten is typically available as metal powder. We report on the production of natural and enriched tungsten targets on carbon backing. We compare the different production processes, taking into account the material yield.

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Atzori, Cesare, Jayashree Ethiraj, Valentina Colombo, Francesca Bonino, and Silvia Bordiga. "Adsorption Properties of Ce5(BDC)7.5(DMF)4 MOF." Inorganics 8, no. 2 (2020): 9. http://dx.doi.org/10.3390/inorganics8020009.

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In this article we report on the spectroscopic and adsorptive studies done on Ce(III)-based MOF possessing, upon desolvation, open metal sites, and a discrete surface area. The Ce-based MOF was synthesized from terephthalic acid linker (H2BDC) and Ce3+ cations by the classical solvothermal method. Preliminary powder X-ray diffraction analysis showed that the obtained materials corresponded to the ones reported by other authors. Spectroscopic techniques, such as XAS and in situ FTIR with probe molecules were used. In situ FTIR spectroscopy confirmed the successful removal of DMF molecules withi

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Sterri, Kjersti B., Volker L. Deringer, Andreas Houben, Philipp Jacobs, Chogondahalli M. N. Kumar, and Richard Dronskowski. "Neutron powder diffraction and theory-aided structure refinement of rubidium and cesium ureate." Zeitschrift für Naturforschung B 71, no. 5 (2016): 431–38. http://dx.doi.org/10.1515/znb-2015-0228.

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AbstractUrea (CN2H4O) is a fundamental biomolecule whose derivatives are abundant throughout chemistry. Among the latter, rubidium ureate (RbCN2H3O) and its cesium analog (CsCN2H3O) have been described only very recently and form the first structurally characterized salts of deprotonated urea. Here, we report on a neutron diffraction study on the aforementioned alkaline-metal ureates, which affords the positions for all hydrogen atoms (including full anisotropic displacement tensors) and thus allows us to gain fundamental insights into the hydrogen-bonding networks in the title compounds. The

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