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Magnesium Technology Symposium held during the 152nd TMS Annual Meeting and Exhibition, TMS 2023

作者： Sehar, Daniel Mcarthur Espinosa, Gabriel Telgerafchi, Armaghan Ehsani Chinwego, Chinenye Lynch, Keira Perrin, Benjamin Powell, Adam Materials Science and Engineering Program Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States Department of Mechanical Engineering Worcester Polytechnic Institute WorcesterMA United States 100 Institute Rd WorcesterMA01609 United States

ISBN: (纸本)9783031226458

Recent global supply shortages, combined with need for light-weight structural components for efficient transportation, have led to very high prices for magnesium due to its low density and high part stiffness/weight. This study continues prior work on magnesium recycling using multiple-effect distillation with gravity as the parameter to create the pressure difference between effects, called G-METS. The long-term vision is for continuous distillation, but experiments to date have only used batch distillers with maximum rate of 1 kg/h. and minimum energy consumption of 2 kWh/kg. This study presents the design of laboratory-scale continuous distiller including a custom-made furnace to sustain a high-power density and temperature gradient for rapid boiling and efficient recovery of magnesium. © The Minerals, Metals & materials Society 2023.

关键词： Distillation

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Recent advances in bio-integrated electrochemical sensors for neuroengineering

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Fundamental Research 2025年第1期5卷 29-47页

作者： Shulin Chen Tzu-Li Liu Yizhen Jia Jinghua Li Department of Materials Science and Engineering The Ohio State UniversityColumbusOH 43210USA Chronic Brain Injury Program The Ohio State UniversityColumbusOH 43210USA

Detecting and diagnosing neurological diseases in modern healthcare presents substantial challenges that directly impact patient *** complex nature of these conditions demands precise and quantitative monitoring of disease-associated biomarkers in a continuous,real-time *** chemical sensing strategies exhibit restricted clinical effectiveness due to labor-intensive laboratory analysis prerequisites,dependence on clinician expertise,and prolonged and recurrent ***-integrated electronics for chemical sensing is an emerging,multidisciplinary field enabled by rapid advances in electrical engineering,biosensing,materials science,analytical chemistry,and biomedical *** review presents an overview of recent progress in bio-integrated electrochemical sensors,with an emphasis on their relevance to neuroengineering and *** traverses vital neurological biomarkers and explores bio-recognition elements,sensing strategies,transducer designs,and wireless signal transmission *** integration of in vivo biochemical sensors is showcased through *** review concludes by outlining future trends and advancements in in vivo electrochemical sensing,and highlighting ongoing research and technological innovation,which aims to provide inspiring and practical instructions for future research.

关键词： Biochemical sensing Neuroengineering Bioimplants Analytical chemistry Bio-integrated electronics

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Multi-scale analysis of microstructural evolution and atomic bonding mechanisms in CoCrFeMnNi high-entropy alloys upon cold spray impact

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材料科学技术（英文版） 2025年第5期208卷 263-277页

作者： R.Nikbakht M.Saadati H.S.Kim M.Jahazi R.R.Chromik Department of Mining and Materials Engineering McGill UniversityMontrealQCCanada Mechanical Engineering Department École de Technologie Supérieure(ETS)MontrealQCCanada Graduate Institute of Ferrous&Eco Materials Technology Pohang University of Science and Technology(POSTECH)Pohang 37673South Korea Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai980-8577Japan Institute for Convergence Research and Education in Advanced Technology Yonsei UniversitySeoul03722South Korea

Large interfacial strains in particles are crucial for promoting bonding in cold spraying(CS),initiated ei-ther by adiabatic shear instability(ASI)due to softening prevailing over strain hardening or by hydrostatic plasticity,which is claimed to promote bonding even without ASI.A thorough microstructural analysis is vital to fully understand the bonding mechanisms at play during microparticle impacts and throughout the CS *** this study,the HEA CoCrFeMnNi,known for its relatively high strain hardening and resistance to softening,was selected to investigate the microstructure characteristics and bonding mech-anisms in *** study used characterization techniques covering a range of length scales,including electron channeling contrast imaging(ECCI),electron backscatter diffraction(EBSD),and high-resolution transmission microscopy(HR-TEM),to explore the microstructure characteristics of bonding and overall structure development of CoCrFeMnNi microparticles after impact in ***-TEM lamellae were prepared using focused ion beam ***,the effects of deformation field variables on microstruc-ture development were determined through finite element modeling(FEM)of microparticle *** ECCI,EBSD,and HR-TEM analyses revealed an interplay between dislocation-driven processes and twin-ning,leading to the development of four distinct deformation *** grain refine-ment occurs at the interface through continuous dynamic recrystallization(CDRX)due to high strain and temperature rise from adiabatic deformation,signs of softening,and *** the interface,a necklace-like structure of refined grains forms around grain boundaries,along with elongated grains,resulting from the coexistence of dynamic recovery and discontinuous dynamic recrystallization(DDRX)due to lower temperature rise and *** the particle or substrate interior,concurrent twinning and dislocation-mediated mechanisms refine the structure,forming straight,cur

关键词： Multi-length scale microstructure characteristics of bonding in cold spray DRX-induced softening and its role in bonding Interplay between twinning-induced hardening and DRX-driven softening EBSD&HR-TEM CoCrFeMnNi high entropy alloys

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Block Sequence Effects on the Self-Assembly Behaviors of Polypeptide-Based Penta-Block Copolymer Hydrogels

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ACS Applied materials and Interfaces 2024年第5期16卷 6674-6686页

作者： Wang, Ke-Hsin Liu, Chung-Hao Tan, Dun-Heng Nieh, Mu-Ping Su, Wei-Fang Department of Materials Science and Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei10617 Taiwan Polymer program Institute of Materials Science University of Connecticut 25 King Hill Road Unit 3136 StorrsCT06269-3136 United States Department of Chemical and Biomolecular Engineering University of Connecticut StorrsCT06269 United States Department of Materials Engineering Ming-Chi University of Technology 84 Gungjuan Rd. New Taipei City243303 Taiwan

Peptide-based hydrogels have great potential for applications in tissue engineering, drug delivery, and so on. We systematically synthesize, characterize, and investigate the self-assembly behaviors of a series of polypeptide-based penta-block copolymers by varying block sequences and lengths. The copolymers contain hydrophobic blocks of poly(γ-benzyl-l-glutamate) (PBG, Bx) and two kinds of hydrophilic blocks, poly(l-lysine) (PLL, Ky) and poly(ethylene glycol) (PEG, EG34), where x and y are the number of repeating units of each block, where PBG and PLL blocks have unique functions for nerve regeneration and cell adhesion. It shows that a sufficient length of the middle hydrophilic segment capped with hydrophobic end PBG blocks is required. They first self-assemble into flower-like micelles and sequentially form transparent hydrogels (as low as 2.3 wt %) with increased polymer concentration. The hydrogels contain a microscale porous structure, a desired property for tissue engineering to facilitate the access of nutrient flow for cell growth and drug delivery systems with high efficiency of drug storage. We hypothesize that the structure of Bx-Ky-EG34-Ky-Bx agglomerates is beyond micron size (transparent), while that of Ky-Bx-EG34-Bx-Ky is on the submicron scale (opaque). We establish a working strategy to synthesize a polypeptide-based block copolymer with a wide window of sol-gel transition. The study offers insight into rational polypeptide hydrogel design with specific morphology, exploring the novel materials as potential candidates for neural tissue engineering. © 2024 The Authors. Published by American Chemical Society

关键词： Block copolymers

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Accelerating matrix/boundary precipitations to explore high-strength and high-ductile Co_(34)Cr_(32)Ni_(27)Al_(3.5)Ti_(3.5) multicomponent alloys through hot extrusion and annealing

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Journal of materials science & Technology 2023年第12期143卷 62-83页

作者： Xiaoming Liu Zongde Kou Ruitao Qu Weidong Song Yijia Gu Changshan Zhou Qingwei Gao Jiyao Zhang Chongde Cao Kaikai Song Vladislav Zadorozhnyy Zequn Zhang Jürgen Eckert Shenzhen Research Institute of Shandong University Shenzhen 518057China State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China School of Mechanical Electrical&Information EngineeringShandong UniversityWeihai 264209China School of Material Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China Department of Materials Science and Engineering Missouri University of Science and TechnologyRollaMO 65409USA Research and Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China National University of Science and Technology«MISIS» Moscow 119049Russia Erich Schmid Institute of Materials Science Austrian Academy of SciencesLeoben A-8700Austria Department of Materials Science Montanuniversität LeobenLeoben A-8700Austria

Annealing-regulated precipitation strengthening combined with cold-working is one of the most efficient strategies for resolving the conflict between strength and ductility in metals and ***,precipitation control and grain refinement are mutually contradictory due to the excellent phase stability of multicomponent *** work utilizes the high-temperature extrusion and annealing to optimize the microstructures and mechanical properties of the Co_(34)Cr_(32)Ni_(27)Al_(3.5)Ti_(3.5) multicomponent *** extrusion effectively reduces grain sizes and simultaneously accelerates the precipitation of coherent L12 nanoparticles inside the face-centered cubic(FCC)matrix and grain boundary precipitations(i.e.,submicron Cr-rich particles and L12-Ni 3(Ti,Al)precipitates),resulting in strongly reciprocal interaction between dislocation slip and hierarchical-scale *** annealing regulates grain sizes,dislocations,twins,and precipitates,further allowing to tailor mechanical *** high yield strength is attributed to the coupled precipitation strengthening effects from nanoscale coherent L12 particles inside grains and submicron grain boundary precipitates under the support of pre-existing *** excellent ductility results from the synergistic activation of dislocations,stacking faults,and twins during plastic *** present study provides a promising approach for regulat-ing microstructures,especially defects,and enhancing the mechanical properties of multicomponent alloys.

关键词： Multicomponent alloys Hot extrusion Microstructure mechanical properties Precipitation strengthening

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Multiplexed electrospraying of water in cone-jet mode using a UV-embossed pyramidal micronozzle film

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Microsystems & Nanoengineering 2022年第5期8卷 247-256页

作者： Ji-hun Jeong Kwangseok Park Hyoungsoo Kim Inyong Park Jinyoung Choi Seung S.Lee Department of Mechanical Engineering Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea Department of Environmental Machinery Korea Institute of Machinery and MaterialsDaejeon 34103Republic of Korea Department of Mechanical Engineering Dongshin UniversityNaju 58245Republic of Korea

The electrospraying of water in the cone-jet mode is difficult in practical applications owing to its low throughput and the electrical discharge caused by the high surface tension of water.A film with multiple dielectric micronozzles is essential for multiplexed electrospraying of water in cone-jet mode without electrical ***,a pyramidal micronozzle film with five nozzles was fabricated using the UV-embossing *** pyramidal micronozzle film consisted of pyramidal micronozzles,a micropillar array,and an in-plane extractor,which were proposed to minimize wetting and concentrate the electric field to the water meniscus at the tip of the pyramidal *** electrospraying of water using a single pyramidal micronozzle was visualized by a high-speed camera at a flow rate of 0.15–0.50ml/h with voltages of 0.0–2.3 kV,−1.6 kV,and−4.0 kV at the water,guide ring,and collector,*** distinct modes,the dripping,spindle,and cone-jet modes,were observed and distinguished according to the motion of the water meniscus at the nozzle *** steady Taylor cone and jet were observed in a voltage range of 1.3–2.0 kV in water,particularly in cone-jet *** electrospraying of water in cone-jet mode at a flow rate of 1.5ml/h was performed using a pyramidal micronozzle film,demonstrating the potential for a high-throughput electrospraying system.

关键词： process. film pyramidal

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Stoichiometric Ti_(3)C_(2)T_(x)Coating for Inhibiting Dendrite Growth in Anode-Free Lithium Metal Batteries

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Energy & Environmental materials 2024年第4期7卷 153-162页

作者： Xiangrong Zeng Manmatha Mahato Woong Oh Hyunjoon Yoo Van Hiep Nguyen Saewoong Oh Geetha Valurouthu Soon-Ki Jeong Chi Won Ahn Yury Gogotsi Il-Kwon Oh National Creative Research Initiative for Functionally Antagonistic Nano-Engineering Department of Mechanical EngineeringKorea Advanced Institute of Science and Technology(KAIST)291 Daehak-roYuseong-guDaejeon 34141Korea Department of Materials Science&Engineering and A.J.Drexel Nanomaterials InstituteDrexel UniversityPhiladelphiaPennsylvania 19104USA Department of Energy Engineering Soonchunhyang University22Soonchunhyang-roSinchang-myeonAsan-siChungcheongnam-do 31538Korea National Nanofab Center(NNFC) Korea Advanced Institute of Science and Technology(KAIST)291 Daehak-roYuseong-guDaejeon 34141Korea

Lithium metal batteries(LMBs)and anode-free LMBs(AFLMBs)present a solution to the need for batteries with a significantly superior theoretical energy ***,their adoption is hindered by low Coulombic efficiency(CE)and rapid capacity fading,primarily due to the formation of unstable solid electrolyte interphase(SEI)layer and Li dendrite growth as a result of uneven Li ***,we report on the use of a stoichiometric Ti_(3)C_(2)T_(x)(S-Ti_(3)C_(2)T_(x))MXene coating on the copper current collector to enhance the cyclic stability of an anode-free lithium metal *** S-Ti_(3)C_(2)T_(x)coating provides abundant nucleation sites,thereby lowering the overpotential for Li nucleation,and promoting uniform Li ***,the fluorine(-F)termination of S-Ti_(3)C_(2)T_(x)participates in the SEI formation,producing a LiF-rich SEI layer,vital for stabilizing the SEI and improving cycle *** equipped with S-Ti_(3)C_(2)T_(x)@Cu current collectors displayed reduced Li consumption during stable SEI formation,resulting in a significant decrease in capacity *** with S-Ti_(3)C_(2)T_(x)@Cu current collectors achieved a high initial capacity density of 4.2 mAh cm^(-2),70.9%capacity retention after 50 cycles,and an average CE of 98.19%in 100 *** innovative application of MXenes in the energy field offers a promising strategy to enhance the performance of AFLMBs and could potentially accelerate their commercial adoption.

关键词： anode-free lithium metal batteries stoichiometric MXene solid electrolyte interphase surface terminations

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Achieving superb strength in single-phase FCC alloys via maximizing volume misfit

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materials Today 2023年 63卷 108-119页

作者： Li, Zhongtao Ma, Shihua Zhao, Shijun Zhang, Weidong Peng, Fei Li, Qian Yang, Tao Wu, Chia-Yi Wei, Daixiu Chou, Yi-Chia Liaw, Peter K. Gao, Yanfei Wu, Zhenggang College of Materials Science and Engineering Hunan University Changsha410082 China Department of Mechanical Engineering City University of Hong Kong Hong Kong Department of Materials Science and Engineering City University of Hong Kong Hong Kong Department of Electrophysics National Yang Ming Chiao Tung University Hsinchu30010 Taiwan Institute for Materials Research Tohoku University 2-1-1 Katahira Miyagi Sendai980-8577 Japan Department of Materials Science and Engineering National Taiwan University Taipei10617 Taiwan Department of Materials Science and Engineering The University of Tennessee KnoxvilleTN37996-2100 United States

Single-phase face-centered cubic (SP-FCC) alloys normally possess low strength. Conventionally strengthening strategies inevitably cause significant ductility sacrifice. Here, a single-phase Ni-based FCC alloy with a superb yield strength of ∼1.05GPa and a good ductility of 37% is designed through maximizing the volume misfits. The misfit of the purposely targeted Ni80Mo20 alloy is severer than all existing FCC alloys, bringing the alloy a highest-ever Hall-Petch coefficient (kHP = 1034 MPa·μm1/2) and a pronounced solid solution strengthening (Δσss = 224 MPa). Current work yields two surprising and novel findings for SP-FCC alloys. First, volume misfit is a good pertinent indicator of kHP. Second, the conventional impression about the sole contribution of edge dislocations to strengthening in SP-FCC alloys may no longer hold;instead, screw dislocations can also kick in once the nonsphericity of the solute-induced stress field reaches a critical value. Altogether, this work paves a new avenue of pursuing ultimate strengthening without significant ductility sacrifice for SP-FCC alloys relying on the volume-misfit-maximization strategy. © 2023 Elsevier Ltd

关键词： Ductility

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Insights into the effects of alkaline treatment and soaking duration on the properties of pterocarpus angolensis (mukwa) wood fibers

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materials Today: Proceedings 2023年 77卷 1132-1136页

作者： Setswalo, K. Oladijo, O.P. Namoshe, M. Siengchin, S. Sanjay, M.R. Department of Mechanical Energy and Industrial Engineering Botswana International University of Science and Technology Palapye Botswana Department of Chemcial Materials and Metallurgical Engineering Botswana International University of Science and Technology Palapye Botswana Natural Composites Research Group Lab Department of Materials and Production Engineering King Mongkut's University of Technology North Banmkok Bangkok Thailand

This work is focused on finding an ecological and economic soaking duration suitable for natural fibers, and in the process obtaining the best possible mukwa wood fibers for manufacturing polymeric composites. Waste mukwa wood fibers found in the semi-arid conditions of Botswana were subjected to 5 wt% NaOH at soaking durations of 1.5 h, 2.5 h, 4 h, 8 h, 12 h, and 24 h. The effect of soaking duration and alkaline treatment on the chemical components, crystallinity, surface morphology, character of molecular bonds, and thermal stability were studied through weight loss, chemical composition, scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscope (FTIR) and Thermogravimetric analysis (TGA) respectively. The results of this study found the 2.5 h soaking duration to be more economic, time saving, and effective in modifying mukwa wood fibers. © 2022

关键词： Thermodynamic stability

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Injectable nanofiber-reinforced bone cement with controlled biodegradability for minimally-invasive bone regeneration

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Bioactive materials 2023年第3期21卷 267-283页

作者： Peihao Cai Shunyi Lu Jieqin Yu Lan Xiao Jiayi Wang Haifeng Liang Lei Huang Guanjie Han Mengxuan Bian Shihao Zhang Jian Zhang Changsheng Liu Libo Jiang Yulin Li The Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic ChemistryEngineering Research Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China Department of Orthopaedic Surgery Zhongshan HospitalFudan UniversityShanghai200032China Centre for Biomedical Technologies School of MechanicalMedical and Process EngineeringQueensland University of TechnologyBrisbane4059Australia

Injectable materials show their special merits in regeneration of damaged/degenerated bones in minimally-invasive *** calcium phosphate bone cement(CPC)has attracted broad attention for its bioactivity,as compared to non-degradable polymethyl methacrylate ***,its brittleness,poor anti-washout property and uncontrollable biodegradability are the main challenges to limit its further clinical application mainly because of its stone-like dense structure and fragile inorganic-salt ***,we developed a kind of injectable CPC bone cement with porous structure and improved robustness by incorporating poly(lactide-co-glycolic acid)(PLGA)nanofiber into CPC,with carboxymethyl cellulose(CMC)to offer good injectability as well as anti-wash-out ***,the introduction of PLGA and CMC also enabled a formation of initial porous structure in the cements,where PLGA nanofiber endowed the cement with a dynamically controllable biodegradability which provided room for cell movement and bone ***-estingly,the reinforced biodegradable cement afforded a sustainable provision of Ca^(2+)bioactive components,together with its porous structure,to improve synergistically new bone formation and osteo-integration in vivo by using a rat model of femur condyle *** study on regenerative mechanisms indicated that the good minimally-invasive bone regeneration may come from the synergistic enhanced osteogenic effect of calcium ion enrichment and the improved revascularization capacity contributed from the porosity as well as the lactic acid released from PLGA *** results indicate the injectable bone cement with high strength,anti-washout property and controllable biodegradability is a promising candidate for bone regeneration in a minimally-invasive approach.

关键词： Injectable calcium phosphate cement Biodegradable PLGA nanofiber Angiogenesis Osseointegration Minimally-invasive bone regeneration

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