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Exploring the Correlation Between Surface Roughness, Surface Energy, Nano-indentation, Electrical Properties, and Magnetic Characteristics of Annealed Co40Fe40Dy20 Thin Films Deposited on Si(100) Substrates

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Journal of Electronic materials 2024年第8期53卷 4498-4511页

作者： Liu, Wen-Jen Chang, Yung-Huang Hsu, Shuo-Ting Fern, Chi-Lon Chen, Yuan-Tsung Tsao, Shin-Ying Lin, Shih-Hung Department of Materials Science and Engineering I-Shou University Kaohsiung840 Taiwan Bachelor Program in Industrial Technology National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou64002 Taiwan Graduate School of Materials Science National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou64002 Taiwan Department of Electronic Engineering National Yunlin University of Science and Technology 123 University Road Section 3 Yunlin Douliou64002 Taiwan

The impact of film thickness and annealing temperature on the structural, electrical, magnetic, and mechanical properties of cobalt–iron–dysprosium (Co40Fe40Dy20 ) thin films deposited on Si(100) substrates have been investigated. X-ray diffraction (XRD) analysis confirmed the film's crystalline microstructure, featuring dysprosium oxide, Dy2O3(440), and cobalt oxide, Co2O3(422) and Co2O3(511), crystallographic phases. Surface energy measurements indicated a noticeable reduction in surface energy following annealing treatments, which could be ascribed to the alleviation of residual stress and enhanced atomic arrangement, resulting in a more stable film structure with reduced surface energy. The film exhibited a decreasing trend in hardness with increasing thickness, and film resistivity was significantly responsive to alterations in thickness and annealing temperature. Notably, the Co40Fe40Dy20 film demonstrated exceptional characteristics, featuring a high saturation magnetization (Ms) of 675 emu/cm3 and a low coercivity (Hc) of 9.5 Oe. Further analysis of magnetic domains and hysteresis loops revealed that larger and brighter domains were associated with higher Hc. To sum up, the surface roughness of CoFeDy films under various annealing temperatures played a pivotal role in shaping their magnetic, electrical, adhesive, and optical characteristics. An improved low-frequency alternating current magnetic susceptibility (χac) value was achieved by minimizing the pinning effect on domain walls through surface smoothing. Moreover, smoother surfaces displayed heightened carrier conductivity, resulting in a decrease in electrical resistance. On the whole, Co40Fe40Dy20 films exhibited outstanding soft magnetic properties, encompassing high saturation magnetization, low coercivity, exceptional mechanical attributes, and decreased surface energy. Graphical Abstract: (Figure presented.) © The Minerals, Metals & materials Society 2024.

关键词： Magnetic susceptibility

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Wet tissue adhesive polymeric powder hydrogels for skeletal muscle regeneration

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Bioactive materials 2024年第10期40卷 334-344页

作者： Mingyu Lee Daun Seo Junggeon Park Sun Hong Lee Jin Jeon Woochan Kim Jangho Kim Hee Seok Yang Jae Young Lee School of Materials Science and Engineering Gwangju Institute of Science and TechnologyGwangju61005Republic of Korea Department of Nanobiomedical Science&BK21 FOUR NBM Global Research Center for Regenerative Medicine Dankook UniversityCheonan31116Republic of Korea Department of Convergence Biosystems Engineering Chonnam National UniversityGwangju61186Republic of Korea Department of Rural and Biosystems Engineering Chonnam National UniversityGwangjuRepublic of Korea Interdisciplinary Program in IT-Bio Convergence System Chonnam National UniversityGwangju61186Republic of Korea

Volumetric muscle loss(VML)frequently results from traumatic incidents and can lead to severe functional *** have been widely employed for VML tissue regeneration,which are unfortunately ineffective because of the lack of intimate contact with injured tissue for structural and mechanical *** hydrogels allow for strong tissue connections for wound ***,conventional adhesive hydrogels exhibit poor tissue adhesion in moist,bleeding wounds due to the hydration layer at the tissue–hydrogel interfaces,resulting in insufficient *** this study,we developed a novel,biocompatible,wet tissue adhesive powder hydrogel consisting of dextran-aldehyde(dex-ald)and gelatin for the regeneration of *** powder absorbs the interfacial tissue fluid and buffer solution on the tissue,spontaneously forms a hydrogel,and strongly adheres to the tissue via various molecular interactions,including the Schiff base *** particular,the powder composition with a 1:4 ratio of dex-ald to gelatin exhibited optimal characteristics with an appropriate gelation time(258 s),strong tissue adhesion(14.5 kPa),and ***-ald/gelatin powder hydrogels presented strong adhesion to various organs and excellent hemostasis compared to other wet hydrogels and fibrin glue.A mouse VML injury model revealed that the dex-ald/gelatin powder hydrogel significantly improved muscle regeneration,reduced fibrosis,enhanced vascularization,and decreased ***,our wet-adhesive powder hydrogel can serve as an effective platform for repairing various tissues,including the heart,muscle,and nerve tissues.

关键词： Powder Hydrogel Wet-adhesive Skeletal muscle regeneration

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Machine learning of organic solvents reveals an extraordinary axis in Hansen space as indicator of spherical precipitation of polymers

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Aggregate 2023年第5期4卷 207-213页

作者： Yuta Ihara Hiroshi Yamagishi Masanobu Naito Yohei Yamamoto Department of Materials Science Faculty of Pure and Applied Sciencesand Tsukuba Research Center for Energy Materials Science(TREMS)University of TsukubaTsukubaJapan Research and Services Division of Materials Data and Integrated System(MaDIS) National Institute for Materials Science(NIMS)TsukubaJapan Program in Materials Science and Engineering Graduate School of Pure and Applied SciencesUniversity of TsukubaTsukubaJapan

Machine learning is an emerging tool in the field of materials chemistry for uncovering a principle from large ***,we focus on the spherical precipitation behavior of polymers and computationally extract a hidden trend that is orthogonal to the availability bias in the chemical *** constructing a dataset,four polymers were precipitated from 416 solvent/nonsolvent combinations,and the morphology of the resulting precipitates were *** dataset was subjected to computational investigations consisting of principal component analysis and machine learning based on random forest model and support vector ***,we eliminated the effect of the availability bias and found a linear combination of Hansen parameters to be the most suitable variable for predicting precipitation *** predicted appropriate solvents are those with low hydrogen bonding capability,low polarity,and small molecular ***,we found that the capability for spherical precipitation is orthogonal to the availability bias and forms an extraordinary axis in Hansen space,which is the origin of the conventional difficulty in identifying the *** extraordinary axis points toward a void region,indicating the potential value of synthesizing novel solvents located therein.

关键词： chemical space computational chemistry machine learning polymers precipitation

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The behavior of different clays subjected to a fast-drying cycle for traditional ceramic manufacturing

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Journal of King Saud University - engineering sciences 2024年第5期36卷 339-348页

作者： Zaccaron, Alexandre de Souza Nandi, Vitor Dal Bó, Marcelo Arcaro, Sabrina Bernardin, Adriano Michael Program on Materials Science and Engineering Universidade do Extremo Sul Catarinense Avenida Universitária 1105 Santa Catarina Criciúma88806-000 Brazil SC Criciúma88813-600 Brazil Ceramic Materials Group Parque Científico e Tecnológico Rodovia Jorge Lacerda 3800 Santa Catarina Criciúma88807-400 Brazil

Studies have been widely carried out on drying techniques and equipment. The behavior of clays subjected to drying stages requires further research. This study aims to evaluate the behavior of the clay ceramic body during the different stages of the drying cycle and match the characteristics of the raw materials with the final quality of the pieces. In this work, the behavior of three different clays in terms of drying performance was studied. The clays were selected, and their chemical, mineralogical, and particle size characteristics were measured. The mixture design (DoE) developed 10 formulations and was processed through vacuum extrusion. The samples were subjected to forced drying cycles of 180 min by varying the temperature from 30 to 90 °C and air speed from 1.5 to 4.0 m/s. At the end of the cycle, the retraction was a determining factor for the crack probability indicator, where formulations that obtained ∼10% retraction in the dry zone showed losses >25%. On the other hand, it is could be stated that claystone assists the drying process of the ceramic piece, minimizing losses. The drying sensitivity coefficient (k-factor) presented values that reproduce the number of losses during drying, proving to be a valid tool to relate clay properties, drying conditions, and losses in this process. In this case, drying process losses >25% were observed when the k-factor was from 1.6. © 2022 The Authors

关键词： Drying

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Severe Plastically Deformed Mg–Zn–Zr–RE Alloy Developed as a Biomaterial

Severe Plastically Deformed Mg–Zn–Zr–RE Alloy Developed a...

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Magnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2024

作者： Shunmugasamy, Vasanth C. Mansoor, Bilal Mechanical Engineering Program Texas A&M University at Qatar Doha Qatar Department of Materials Science and Engineering Texas A&M University College StationTX United States

ISBN: (纸本)9783031502392

Mg alloysMagnesium alloys (Mg alloys) have high corrosion rateCorrosion Rate that inhibits their application as biomaterialBiomaterials. For safe use as biomaterial, it is essential to control their corrosion ratesCorrosion Rate. In Mg alloys, microgalvanicMicro-galvanic corrosion coupling between the α-Mg matrix and secondary precipitates can exist which results in increased corrosion rate. To address this challenge, we engineered the microstructureMicrostructure of a biodegradable Mg–Zn–RE–Zr alloy by severe plastic deformationPlastic deformation process such as friction stir processingFriction Stir Processing (FSP) (FSP), improving its corrosion resistance and mechanical propertiesMechanical Properties simultaneously. Subjecting the alloy to FSP resulted in refined grains, basal textureTexture and broken and uniformly distributed secondary precipitates. In vitro corrosion of base material showed microgalvanic coupling between precipitate and matrix, resulting in unstable surface layer. The processed alloy showed uniform corrosion owing to formation of stable surface film formation, due to the refined grains, texture, and distribution of precipitates. The results show promising potential of Mg alloyMagnesium alloys (Mg alloys)as biomaterialBiomaterials. © The Minerals, Metals & materials Society 2024.

关键词： Corrosion resistance

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Continuous Lithium-Ion Extraction From Seawater and Mine Water With a Fuel Cell System and ceramic Membranes

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Energy & Environmental materials 2024年第6期 258-265页

作者： Cansu K?k Lei Wang Jean Gustavo A.Ruthes Antje Quade Matthew E.Suss Volker Presser INM-Leibniz Institute for New Materials Department of Materials Science & Engineering Saarland University Leibniz Institute for Plasma Science and Technology Faculty of Mechanical Engineering Technion-Israel Institute of Technology Wolfson Department of Chemical Engineering Technion-Israel Institute of Technology Grand Technion Energy Program Technion-Israel Institute of Technology Saarene-Saarland Center for Energy Materials and Sustainability

The demand for electronic devices that utilize lithium is steadily increasing in this rapidly advancing technological *** high-purity lithium in an environmentally friendly way is challenging by using commercialized ***,we propose the first fuel cell system for continuous lithium-ion extraction using a lithium superionic conductor membrane and advanced *** fuel cell system for extracting lithium-ion has demonstrated a twofold increase in the selectivity of Li+/Na+while producing electricity.

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Effect of Sn addition on electrochemical activity of ribbons of Mg-Al-Ca anode material for rechargeable magnesium batteries fabricated by rapid solidification

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Keikinzoku/Journal of Japan Institute of Light Metals 2025年第1期75卷 9-13页

作者： Fukuta, Yoshitaka Kikura, Kensei Tsukeda, Tadayoshi Aida, Tetsuo Tabata, Hironobu Kurihara, Hideki Suzuki, Mayumi Program of Materials Science and Engineering Studies in Science and Engineering Graduate School of Science and Engineering University of Toyama 3190 Gofuku Toyama-shi Toyama930-8555 Japan Graduate School of Science and Engineering University of Toyama Toyama-shi Toyama Japan Faculty of Sustainable Design Academic Assembly University of Toyama Toyama-shi Toyama Japan CHUETSU METAL WORKS CO. LTD. Nakaniikawagun Toyama Japan Saitama Industrial technology Center Kawaguchi-shi Saitama Japan Department of Mechanical Systems Engineering Faculty of Engineering Toyama Prefectural University Imizu-shi Toyama Japan

Magnesium-based batteries are potential candidates for next-generation rechargeable batteries due to the divalent nature of magnesium cations and the natural abundance of magnesium resources. In this study, the electrochemical activity of Mg-6mass%Al-3mass%Ca anodes combined with Sn was investigated. Thin ribbons of the anode specimens were prepared by a single-roll rapid solidification method. The results showed that the electrochemical activity increased upon adding 1 mass% Sn, while it decreased for 3 mass% Sn. Based on the results of an X-ray diffraction analysis, the addition of Sn led to the formation of Mg2Sn and Ca2Sn phases, which increased the lattice distortion. Scanning electron microscopy observations indicated that these secondary phases were homogeneously distributed for 1 mass% Sn addition, while they were coarsely distributed for 3 mass% Sn. © 2025 The Japan Institute of Light Metals.

关键词： X ray diffraction analysis

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Surface modification techniques of membranes to improve their antifouling characteristics:recent advancements and developments

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Frontiers of Chemical science and engineering 2023年第12期17卷 1837-1865页

作者： Muhammad Tawalbeh Haya Aljaghoub Muhammad Qasim Amani Al-Othman Sustainable and Renewable Energy Engineering Department University of SharjahSharjah 27272United Arab Emirates Sustainable Energy&Power Systems Research Centre RISEUniversity of SharjahSharjah 27272United Arab Emirates Industrial Engineering and Engineering Management Department University of SharjahSharjah 27272United Arab Emirates Department of Chemical and Biological Engineering American University of SharjahSharjah 26666United Arab Emirates Materials Science and Engineering Program College of Arts and SciencesAmerican University of SharjahSharjah 26666United Arab Emirates

Extensive research efforts are currently devoted to developing and improving conventional technologies for water treatment. Membrane-based water treatment technologies are among the most preferred options due to their commercial success, simple operation, low energy and space requirements, and high separation efficiency. Despite the advances made in membrane-based technologies, fouling remains a critical challenge. Fouling occurs upon the accumulation of unwanted impurities on the membrane surface and within the membrane pores which results in a significant decline in the membrane permeate flux. To alleviate the operational challenges from fouling, surface modification to develop antifouling membranes appears to be an effective technique. A comprehensive review of the surface modification techniques for the development of antifouling membranes is provided in this paper. Chemical surface modification techniques (grafting and plasma treatment), physical modification techniques (blending, coating, adsorption, and thermal treatment), and combined physical and chemical modification techniques have been discussed. Moreover, the challenges related to surface modification and the future research directions are addressed.

关键词： fouling antifouling membrane surface modification membrane pretreatment

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Effect of Mixing Strategy on the Structure-Properties of the PLA/PBAT Blends Incorporated with CNC

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Journal of Renewable materials 2022年第1期10卷 149-164页

作者： Deniz Sema Sarul Dogan Arslan Emre Vatansever Yusuf Kahraman Ali Durmus Reza Salehiyan Mohammadreza Nofar Polymer Science and Technology Program Institute of Science and TechnologyIstanbul Technical UniversityIstanbul34469Turkey Metallurgical&Materials Engineering Department Faculty of Chemical and Metallurgical EngineeringIstanbul Technical UniversityIstanbul34469Turkey Department of Chemical Engineering Faculty of EngineeringIstanbul University-CerrahpasaIstanbul34320Turkey Department of Materials Research and Technology Luxembourg Institute of Science and TechnologyEsch-sur-Alzette4362Luxembourg

Polylactide(PLA)/poly(butylene adipate-co-terephthalate)(PBAT)blend nanocomposites including 3 wt%of cel-lulose nanocrystals(CNCs)were prepared by melt compounding method in a twin-screw extruder and an inter-nal *** nanocomposites were formulated by diluting three different masterbatches prepared by solution casting method that contained 7 wt%of *** masterbatches were:(m1)PLA/PBAT/CNC masterbatch;(m2)PLA/CNC masterbatch;and(m3)PBAT/CNC *** were to explore how different prepara-tion methods affect the dispersion and localization of CNC and hence the properties of PLA/PBAT/CNC blend *** electron microscopy(SEM)was used to study the structural changes of the *** properties of PLA/PBAT blends and PLA/PBAT/CNC blend nanocomposites were also *** the samples prepared by internal mixer,the rheological behavior of blend nanocomposite prepared through premixing of CNC particles with PLA showed a transition from liquid-like to a gel-like *** to the rheological results and differential scanning calorimetry(DSC)analysis,it was found that the CNC overall enhanced the viscoelastic properties of blends and improved the PLA crystallization,*** mechanical analysis(DMA)illustrated that the incorporation of CNC also enhanced the elastic modulus of PLA/PBAT blends specifically above the glass transition temperature of *** expected improvements in mechanical properties did not occur due to the possible existence of residual solvent in the blends.

关键词： Polylactide poly(butylene adipate-co-terephthalate) cellulose nanocrystals blend nanocomposite morphology rheology

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Efficient Recycling of Magnesium Alloys via Partial Distillation Using Gravity-Multiple Effect Thermal System (G-METS)

Efficient Recycling of Magnesium Alloys via Partial Distilla...

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Magnesium Technology Symposium, 2025, held as part of the TMS Annual Meeting and Exhibition, TMS 2025

作者： McArthur Sehar, Daniel Saito, Kenichi Telgerafchi, Armaghan Gallego, Maya Sridhar, Meera Iurkovskyi, Artem Powell, Adam Department of Materials Science and Engineering Program Worcester Polytechnic Institute 100 Institute Rd. WorcesterMA01609 United States Department of Mechanical Engineering Shibaura Institute of Technology Tokyo Japan Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States

ISBN: (纸本)9783031810602

MagnesiumMagnesium’s remarkable stiffnessStiffness-to-weight and high strengthStrength-to-weight ratios could enable substantial vehicle lightweighting versus aluminum and steel. However, primary production is very energy- and emissions-intensive, and recyclingRecycling cannot cost-effectively produce magnesiumMagnesium of sufficient purity for die casting and other structural applications. Distillation can produce high-purity magnesiumMagnesium but is capital- and energy-intensive. Gravity-Driven Multiple Effect Thermal System (G-METS) is a continuous low-pressure magnesiumMagnesium distillation process used in primary production or recyclingRecycling in which heat re-use leads to just 0.5–1 kWh energy consumption per kgMg Mg product—which is 80–90% less energy than current Mg distillation. This paper presents new partial distillation experiments showing 99.96% product purity. An industrial distiller design can help to estimate capital costs. New modeling work describes temperature and pressure change in the vapor conduit, energy use and losses in the industrial distiller, and effects of evaporator flow vanes on the separation of volatile elements such as zinc. © The Minerals, Metals & materials Society 2025.

关键词： Magnesium alloys

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