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

作者： Yaghoobi, Mohammadreza Berman, Tracy Chen, Zhe Tallman, Aaron Greeley, Duncan A. Pilipchuk, Michael Allison, John E. Sundararaghavan, Veera Department of Materials Science and Engineering University of Michigan Ann ArborMI United States Department of Mechanical and Materials Engineering Florida International University MiamiFL United States Department of Aerospace Engineering University of Michigan Ann ArborMI United States

ISBN: (纸本)9783031502392

An open-source parallel 3D crystal plasticity finite elementCrystal Plasticity Finite Element (CPFE) software package, PRISMS-PlasticityPRISMS-Plasticity, is presented here as a part of the overarching PRISMS Center integrated framework. A new PRISMS-Plasticity indentation module is integrated into the framework which can efficiently model indentation of large microstructuresMicrostructureof Mg alloysMagnesium alloys (Mg alloys). A new rate-dependent twinningTwinning-detwinning model is incorporated into the framework based on an integration point sensitive scheme to model Mg alloys. The model includes both kinematic and isotropic hardening in order to handle cyclic response of structural metals. PRISMS-PlasticityPRISMS-Plasticity TM is incorporated to rapidly simulate the effects of alloying on textureTexture development in Mg-Zn-Ca alloys. Finally, the PRISMS-Plasticity software has been integrated with the PRISMS-PF phase-field framework to model twinningTwinningwithin Mg alloysMagnesium alloys (Mg alloys). © The Minerals, Metals & materials Society 2024.

关键词： Open systems

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Designing Accelerated Vibration Tests Using Model-Based Equivalent Damage Prediction 41st

Designing Accelerated Vibration Tests Using Model-Based Equi...

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41st IMAC, A Conference and Exposition on Structural Dynamics, 2023

作者： Kinnard, Taylor McMullan, Davis Pane, Katherine Flynn, Garrison S. Thompson, Thomas Moore, Keegan Department of Aerospace and Mechanical Engineering University of Notre Dame Notre DameIN United States Department of Mechanical Engineering Texas A&M University College StationTX United States Department of Materials Science and Mechanical Engineering Harvard University CambridgeMA United States Los Alamos National Laboratory Los AlamosNM United States Department of Mechanical and Materials Engineering University of Nebraska LincolnNE United States

ISBN: (纸本)9783031349294

The use of vibration testing to complete qualification of critical components is important for a wide variety of industries to understand the life cycles of their products in operational environments. A common problem with testing components to failure is the time and cost associated with mimicking the full life of a part, creating a need for shorter-duration testing that provides comparable life cycle information. The most common methods that accelerate damage tests use Miner’s Rule, an equation that sums damage percentages caused by varying stress amplitudes. The aim of using Miner’s Rule in damage analysis is to find a shorter-duration test cycle that will provide equivalent damage to the part’s real-world environment. This method has demonstrated accuracy under constant amplitude loading but loses reliability under variable amplitude loadings due to its lack of regard toward the loading sequence. Furthermore, translating from a stress-cycle (SN) curve to design amplitudes for testing requires system knowledge. Finally, the entire process of damage equivalence for additively manufactured (AM) parts is minimally explored in current research. This study seeks to improve the quality of test acceleration by utilizing models of the system under test to not only provide a method for faster, more accurate equivalent damage analysis but also to fill a void of a lack of information regarding test compression of AM parts. To do this, AM specimens designed with a failure point under a complex stress history are evaluated. First, parts are vibration tested on a shaker to achieve experimental failure time. Next, the base inputs used for experimentation are modeled in simulation to evaluate theoretical failure time. Finally, test results of the experimental setup and simulated environment were compared to evaluate the accuracy of Miner’s rule in equivalent damage analysis, as well as test accuracy of SN curves for designing tests of AM parts. © 2024, The Society for Experiment

关键词： Finite element method

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Fluorine-Free Cosolvent Chemistry Empowering Sodium-Sulfurized Polyacrylonitrile Batteries

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Advanced Energy materials 2025年第0期

作者： Pai, Min-Hao Manthiram, Arumugam Materials Science and Engineering Program & Walker Department of Mechanical Engineering The University of Texas at Austin AustinTX78712 United States

Localized high-concentration electrolytes (LHCE) show great promise for room-temperature sodium-sulfur batteries. However, the majority of diluents in LHCE systems consist of fluorinated ethers, which are not only dense and expensive but also demonstrate poor reductive stability with sodium metal. Herein, a low-density, non-fluorinated ether electrolyte is presented that demonstrates localized high-concentration behavior. This feature is driven by the weak solvating capabilities of 1,2-dimethoxypropane (DMP) and the ultra-weak solvating nature of cyclopentyl methyl ether (CPME). Impressively, the fluorine-free CPME cosolvent acts as a diluent within the electrolyte. Therefore, the electrolyte achieves a tailored solvation structure characterized by anion-rich species, which fosters the development of a resilient inorganic-rich SEI with superior Na-ion transport. Consequently, with a high sulfur-content sulfurized polyacrylonitrile (SPAN, S content > 45% in SPAN) loading of 4.4 mg cm⁻2 (sulfur loading: 2 mg cm⁻2) and a low electrolyte-to-SPAN ratio of 9 µL mg⁻¹ (E/SPAN = 9), the Na-SPAN cell demonstrates remarkable reversibility of 530 mA h gsulfur⁻¹ after 200 cycles at C/5 rate. This performance surpasses the majority of state-of-the-art Na-SPAN ether-based electrolyte systems reported to date. Hence, this work presents a novel approach for designing cost-effective, high-performance electrolytes for stable, practical Na-SPAN batteries. © 2025 Wiley-VCH GmbH.

关键词： Sodium-ion batteries

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Inhibiting scar formation via wearable multilayer stacked electret patch:Self-creation of persistent and customizable DC electric field for fibrogenic activity restriction

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InfoMat 2024年第3期6卷 66-80页

作者： Sung-Won Kim Sumin Cho Donghan Lee Jiyu Hyun Sunmin Jang Inwoo Seo Hyun Su Park Hee Jae Hwang Hyung-Seop Han Dae Hyeok Yang Heung Jae Chun Suk Ho Bhang Dongwhi Choi School of Chemical Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Department of Mechanical Engineering(Integrated Engineering Program) Kyung Hee UniversityYonginGyeonggiRepublic of Korea Biomaterials Research Center Biomedical Research DivisionKorea Institute of Science and Technology(KIST)SeoulRepublic of Korea Department of Medical Life Sciences College of MedicineInstitute of Cell and Tissue EngineeringThe Catholic University of KoreaSeoulRepublic of Korea

Electrical stimulation has recently received attention as noninvasive treatment in skin wound healing with its outstanding biological property for clinical ***,the complexity of equipment for applying appropriate electrical stimulation remains an ongoing ***,we proposed a strategy for skin scar inhibition by providing electrical stimulation via a multilayer stacked electret(MS-electret),which can generate direct current(DC)electric field(EF)without any power supply *** addition,the MS-electret can easily control the intensity of EFs by simply stacking electret layers and maintain stable EF with the surface potential of 3400 V over 5 days owing to the injected charges on the electret *** confirmed inhibition of type 1 collagen andα-SMA expression of human dermal fibroblasts(hDFs)by 90%and 44%in vitro,indicating that the transition of hDFs to myofibroblasts was restricted by applying stable electrical *** further revealed a 20%significant decrease in the ratio of myofibroblasts caused by the MS-electret in *** findings present that the MS-electret is an outstanding candidate for effective skin scar inhibition with a battery-free,physiological electrical microenvironment,and noninvasive treatment that allows it to prevent external infection.

关键词： DC electric field dermal fibroblasts electret scar formation restriction self-creation of electrical stimulation

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Single-element amorphous palladium nanoparticles formed via phase separation

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Nano Research 2022年第6期15卷 5575-5580页

作者： Dong Sheng He Yi Huang Benjamin D.Myers Dieter Isheim Xinyu Fan Guang-Jie Xia Yunsheng Deng Lin Xie Shaobo Han Yang Qiu Yang-Gang Wang Junhua Luan Zengbao Jiao Li Huang Vinayak P.Dravid Jiaqing He Pico Center and Department of Physics Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering Northwestern UniversityEvanstonIL 60208USA Department of Chemistry and Guangdong Provincial Key Laboratory of Catalytic Chemistry Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Materials Science and Engineering City University of Hong KongHong KongChina Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina

Physically vitrifying amorphous single-element metal requires ultrahigh cooling rates,which are still unachievable for most of the closest-packed ***,we report a facile chemical synthetic strategy for single-element amorphous palladium nanoparticles with a purity of 99.35 at.%±0.23 at.%from palladium–silicon liquid ***-situ transmission electron microscopy directly detected the solidification of palladium and the separation of *** hydrogen absorption experiment showed that the amorphous palladium expanded little upon hydrogen uptake,exhibiting a great potential application for hydrogen *** results provide insight into the formation of amorphous metal at nanoscale.

关键词： Pd single-element metallic glass nanoparticle phase separation undercooling

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Effect of polyethylene glycol on the crystallization,rheology and foamability of poly(lactic acid)containing in situ generated polyamide 6 nanofibrils

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Frontiers of Chemical science and engineering 2023年第12期17卷 2074-2087页

作者： Yuhui Qiao Qian Li Amirjalal Jalali Dongsheng Yu Xichan He Xiaofeng Wang Jing Jiang Zhiyu Min Department of Materials Science and Engineering Luoyang Institute of Science and TechnologyLuoyang 471023China Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium Based Battery Luoyang Institute of Science and TechnologyLuoyang 471023China National Center for International Research of Micro-Nano Molding Technology Zhengzhou 450001China Microcellular Plastics Manufacturing Laboratory Department of Mechanical and Industrial EngineeringUniversity of TorontoToronto M5S 3G8Canada School of Mechanical and Power Engineering Zhengzhou UniversityZhengzhou 450001China

In this study,the rheological properties,crystallization and foaming behavior of poly(lactic acid)with polyamide 6 nanofibrils were examined with polyethylene glycol as a *** 6 particles were deformed into nanofibrils during *** the 10%polyamide 6 case,polyethylene glycol addition reduced the polyamide 6 fibril diameter from 365.53 to 254.63 nm,owing to the smaller polyamide 6 particle size and enhanced interface *** experiments revealed that the viscosity and storage modulus of the composites were increased,which was associated with the three-dimensional entangled network of polyamide 6 *** presence of higher aspect ratio polyamide 6 nanofibrils substantially enhanced the melt strength of the *** isothermal crystallization kinetics results suggested that the polyamide 6 nanofibrils and polyethylene glycol had a synergistic effect on accelerating poly(lactic acid)*** the polyethylene glycol,the crystallization half-time reduced from 103.6 to 62.2 *** foaming results indicated that owing to higher cell nucleation efficiency,the existence of polyamide 6 nanofibrils led to a higher cell density and lower expansion ***,the poly(lactic acid)/polyamide 6 foams exhibited a higher cell density and expansion ratio than that of the foams without polyethylene glycol.

关键词： poly(lactic acid) foaming microfibrillation rheological property crystallization

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Automating life science labs at the single-cell level through precise ultrasonic liquid sample ejection:PULSE

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Microsystems & Nanoengineering 2024年第6期10卷 173-188页

作者： Peiran Zhang Zhenhua Tian Ke Jin Kaichun Yang Wesley Collyer Joseph Rufo Neil Upreti Xianjun Dong Luke P.Lee Tony Jun Huang Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNC 27708USA Department of Mechanical Engineering Virginia Polytechnic Institute and State UniversityBlacksburgVA 24061USA Genomics and Bioinformatics Hub Department of NeurologyBrigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA Department of Medicine Brigham and Women’s HospitalHarvard Medical SchoolBostonMAUSA Department of Bioengineering Department of Electrical Engineering and Computer ScienceUniversity of California at BerkeleyBerkeleyCAUSA Institute of Quantum Biophysics Department of BiophysicsSungkyunkwan UniversitySuwonKorea Department of Chemistry&Nanoscience Ewha Womans UniversitySeoulKorea

Laboratory automation technologies have revolutionized biomedical ***,the availability of automation solutions at the single-cell level remains scarce,primarily owing to the inherent challenges of handling cells with such small dimensions in a precise,biocompatible ***,we present a single-cell-level laboratory automation solution that configures various experiments onto standardized,microscale test-tube matrices via our precise ultrasonic liquid sample ejection technology,known as *** enables the transformation of titer plates into microdroplet arrays by printing nanodrops and single cells acoustically in a programmable,scalable,and biocompatible *** pipetting robots,PULSE enables researchers to conduct biological experiments using single cells as anchoring points(e.g.,1 cell vs.1000 cells per“tube”),achieving higher resolution and potentially more relevant data for modeling and downstream *** demonstrate the ability of PULSE to perform biofabrication,precision gating,and deterministic array barcoding via preallocated droplet-addressable *** cells can be gently printed at a speed range of 5–20 cell⋅s−1 with an accuracy of 90.5–97.7%,which can then adhere to the substrate and grow for up to 72 h while preserving cell *** the deterministic barcoding experiment,95.6%barcoding accuracy and 2.7%barcode hopping were observed by comparing the phenotypic data with known genotypic data from two types of single *** PULSE platform allows for precise and dynamic analyses by automating experiments at the single-cell level,offering researchers a powerful tool in biomedical research.

关键词： precise liquid offering

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UV-Enhanced Room-Temperature Ammonia Detection Using a Ga2O3/Ti3C2Tx MXene Gas Sensor

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IEEE Sensors Journal 2025年第11期25卷 18731-18740页

作者： Cha, Goeun Shanmugasundaram, Arunkumar Paeng, Changung Kang, Yunsung Yoon, Youngsam Yim, Changyong Park, Jongsung Chonnam National University MEMS and Nanotechnology Laboratory School of Mechanical Engineering Gwangju61186 Korea Republic of Kyungpook National University Department of Precision Mechanical Engineering Sangju37224 Korea Republic of Korea Military Academy Department of Electrical Engineering Seoul01805 Korea Republic of Kyungpook National University School of Advanced Science and Technology Convergence Graduate School Sangju37224 Korea Republic of Kyungpook National University Department of Energy Materials & Chemical Engineering Sangju37224 Korea Republic of Kyungpook National University Convergence Research Center of Mechanical and Chemical Engineering Sangju37224 Korea Republic of

The present study proposes a Ga2O3/Ti3C2Tx heterojunction-based gas sensor capable of detecting NH3 at room temperature. In this heterojunction, Ga2O3 nanorods, a type of metal oxide, were synthesized on two-dimensional Ti3C2Tx MXene using a hydrothermal method. The sensor was fabricated by drop-casting the Ga2O3/Ti3C2Tx composite onto interdigitated electrodes and evaluated under varying NH3 concentrations with and without UV illumination. The fabricated Ga2O3/Ti3C2Tx heterojunction exhibits enhanced reactivity with ammonia gas due to the high surface area of Ga2O3 and the superior electrical conductivity of Ti3C2Tx, resulting in a synergistic effect that significantly improves NH3 detection performance. Additionally, when exposed to UV light at room temperature, the Ga2O3/Ti3C2Tx gas sensor demonstrates an increased response and stable baseline resistance recovery. The response to 25 ppm NH increased from 18.68% without UV to 23.47% with UV, highlighting the enhanced performance enabled by UV illumination. These findings indicate the sensor's potential for ammonia detection across a wide concentration range and highlight its promise for commercial applications in various environmental settings. © 2025 IEEE.

关键词： Nanorods

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Microstructural evolution in lithium plating process and its effect on the calendar storage life

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Nano Research 2024年第10期17卷 8834-8841页

作者： Ki Hwan Koh Dong Ju Lee Anthony Mu Kangwoon Kim Taehee Kim Zheng Chen Department of Chemical and Nano Engineering University of California San DiegoLa JollaCA 92093USA Program of Materials Science and Engineering University of California San DiegoLa JollaCA 92093USA Sustainable Power and Energy Center University of California San DiegoLa JollaCA 92093USA

The growing demand for electric vehicles highlights the need for energy storage solutions with higher densities,spotlighting Li metal anodes as potential successors to traditional Li-ion batteries(LIBs).Achieving longer calendar aging life for Li metal anodes is crucial for their practical use,given their propensity for corrosion due to a low redox potential,which leads to compromised cycling stability and significant capacity loss during *** research investigated that this susceptibility is mainly dependent on the surface area of Li metal anode and the properties of the solid electrolyte interphase(SEI),particularly its stability and growth *** research adds to this understanding by demonstrating that the amount of Li plating is a key factor in its corrosion during open-circuit storage,as assessed across various *** discovered that increasing the Li plating amount effectively reduces Coulombic efficiency(C.E.)loss during aging,due to a lower surface area-to-Li *** implies that the choice of electrolyte for optimal storage life should consider the amount of Li plating,with higher capacities promoting better storage characteristics.

关键词： lithium metal batteries anode-free batteries calendar life of batteries lithium anode corrosion

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ZnCrXFe2-XO4 (X = 0–2) porous powder prepared through self-combustion glycine nitrate process and applied to methyl alcohol steam reforming for production of pure hydrogen

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International Journal of Hydrogen Energy 2024年第PartD期49卷 724-735页

作者： Wu, Ti-Hsuan Yu, Chung-Lun Chen, Jui-Hung Huang, Jhong-Ren Sakthinathan, Subramanian Kameoka, Satoshi Chiu, Te-Wei Lin, Chia-Cheng Fan, Liangdong Lee, Yi-Hsuan Chen, Po-Chou Department of Materials and Mineral Resources Engineering National Taipei University of Technology Taipei10608 Taiwan Institute of Materials Science and Engineering National Taipei University of Technology Taipei10608 Taiwan Department of Chemical Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Institute of Multidisciplinary Research for Advanced Materials Tohoku University Sendai980-8577 Japan Department of New Energy Science and Technology College of Chemistry and Environmental Engineering Shenzhen University Shenzhen518060 China Department of Mechanical Engineering National Taipei University of Technology Taipei10608 Taiwan Graduate Institute of Organic and Polymeric Materials National Taipei University of Technology Taipei10608 Taiwan E-Current Co. Ltd. Taipei10533 Taiwan

Climate change, global warming, and energy crisis have become an important problem due to the environmental impact of fossil fuels. Hence, alternate energy source is needed for environmental remediation. One such source could be hydrogen (H2). H2 is used as an alternate energy carrier due to it is non-toxic, clean, and efficient. Steam reforming of methyl alcohol (or) methanol (SRM) is a widely available and low-cost hydrogen production method. In this stream-reforming process, mostly commercial zinc-supported catalyst is used, these have some economic defect. Therefore, we need to find alternate suitable catalysts for the SRM process. In this study, ZnCrXFe2-XO4 (X = 0–2) porous catalyst powders of different ratios were synthesized by the glycine nitrate process (GNP) for hydrogen production by SRM. The specific surface areas of the ZnCrXFe2-XO4 powders ranged from 15.75 m2/g to 45.16 m2/g. The ZnCr0.4Fe1.6O4 powder had the highest H2 production without activation, reaching 6850.33 ml STP min−1 g-cat−1 at a reaction temperature of 450 °C. ZnCr0.4Fe1.6O4 porous powders prepared using the GNP method have simple, rapid process steps, low cost, high catalytic activity, and they can be applied to hydrogen fuel cells or other related catalysis applications in the future. The pure hydrogen production performance of these ZnCrXFe2-XO4 catalysts could be of great importance in industry and economic impact. © 2023 Hydrogen Energy Publications LLC

关键词： Amino acids

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