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2nd International Conference on Functional material, Manufacturing and Performances, ICFMMP 2021

作者： Singh, Jarnail Bhardwaj, Pankaj Kumar, Ravi Dixit, Saurav Kumar, Kaushal Verma, Vikram Department of Mechanical Engineering K.R. Mangalam University Gurgaon122103 India Department of Material Science and Engineering National Institute of Technology Hamirpur Hamirpur177005 India Division of Research & Innovation Uttaranchal University Dehradun India

ISBN: (纸本)9789811941467

In this present report, effect on iron (Fe) substitution on the structural properties of chromium oxide (Cr2O3) nanoparticles has been investigated in detail. Simple and cost-effective co-precipitation technique was used to synthesize Fe-substituted Cr2O3 nanoparticles at various Fe-concentrations. Structural properties of as-prepared nanoparticles were examined using X-ray diffraction (XRD) technique and Fourier transform infrared (FTIR) spectroscopy. XRD results demonstrated that crystal structure remains single phase up to x = 0.20 of Fe-content. Single-phase Cr2O3 nanoparticles crystallize in rhombohedral crystal structure with space group. Beyond x = 0.20 of Fe-content into Cr2O3 nanoparticles, formation of secondary phase in the form of iron oxide (Fe2O3) has been initiated. Both Cr2O3 and Fe2O3 materials crystallize in same corundum structure with same space group. Hence, we have performed Rietveld refinement for detailed structural study of multi-phase compound. In a multi-component system, phase fraction has also been determined using Rietveld refinement method. FTIR spectra also complement the XRD results and demonstrated the Cr–O and Fe–O vibration band in octahedral environment. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Rietveld refinement

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Manufacturing of PEEK-PDMS Composite materials for Intervertebral Disc Implants 23

Manufacturing of PEEK-PDMS Composite Materials for Intervert...

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23rd International Conference on Electronics Packaging, ICEP 2024

作者： Mie, Heng-Ching Liu, Yu-Chen Mizuno, Jun National Cheng Kung University Department Of Materials Science And Engineering Taiwan National Cheng Kung University Program On Smart And Sustainable Manufacturing Academy Of Innovative Semiconductor And Sustainable Manufacturing Taiwan National Cheng Kung University Department Of Mechanical Engineering Taiwan

ISBN: (纸本)9784991191176

The current treatment approach for lower back pain caused by intervertebral disc (IVD) degeneration involves the use of PEEK (polyether ether ketone) polymer or titanium alloy based spinal cages to replace the degenerated IVD. However, this method not only restricts the natural mobility of the vertebrae but also fails to mimic the structure and function of the human IVD with a single material. Additionally, the use of high-hardness materials may lead to vertebral settling, further contributing to lower back pain. Therefore, this study is dedicated to utilizing high-biocompatibility polymer (PEEK and Polydimethylsiloxane (PDMS)) composites to create an artificial IVD closely mimics the real intervertebral disc. Through adjusting the manufacture parameters, the proportion of PEEK and PDMS, and the porosity we were able to achieve the elastic modulus that is close to those of humans' IVD. Furthermore, the dual-layer structure can better replicate the functions and structure of human intervertebral disc then spinal cage. © 2024 Japan Institute of Electronics Packaging.

关键词： Polydimethylsiloxane

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Aqueous Zn-CO_(2) batteries:a route towards sustainable energy storage

Industrial Chemistry & Materials

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Industrial Chemistry & materials 2024年第4期2卷 514-532页

作者： Yanxiu Liu Junjie Chen Weichen Li Yu Zhang Xianwei Fu Erling Li Shangbin Jin Li-Ming Yang Zhihong Tian Markus Antonietti Tianxi Liu School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China Engineering Research Center for Nanomaterials Henan UniversityKaifeng 475004P.R.China Department of Colloid Chemistry Max Planck Institute of Colloids and InterfacesPotsdam 14476Germany Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122P.R.China School of Chemical Engineering and Technology Xi'an Jiaotong University28 Xianning RoadXi'anShaanxi710049China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China

In recent years,the concept of rechargeable aqueous Zn–CO_(2) batteries has attracted extensive attention owing to their dual functionality of power supply and simultaneous conversion of CO_(2) into value-added chemicals or *** state-of-the-art research has been mainly focused on the exploration of working mechanisms and catalytic cathodes but hardly applies an integrative *** numerous studies have proven the feasibility of rechargeable aqueous Zn–CO_(2) batteries,challenges remain including the low CO_(2) conversion efficiency,poor battery capacity,and low energy *** review systematically summarizes the working principles and devices,and the catalytic cathodes used for Zn–CO_(2) *** challenges and prospects in this field are also elaborated,providing insightful guidance for the future development of rechargeable aqueous Zn–CO_(2) batteries with high performance.

关键词： Zn-CO_(2)battery CO_(2)reduction reaction Working mechanism Electrocatalysts

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On the Propulsion of a Rigid Body in a Viscous Liquid Under the Action of a Time-Periodic Force

arXiv

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arXiv 2024年

作者： Karakouzian, Mher M. Galdi, Giovanni P. Department of Mechanical & Material Science Swanson School of Engineering University of Pittsburgh Pittsburgh United States

A rigid body B moves in an otherwise quiescent viscous liquid filling the whole space outside B, under the action of a time-periodic force f of period T applied to a given point of B and of fixed direction. We assume that the average of f over an interval of length T does not not vanish, and that the amplitude, δ, of f is sufficiently small. Our goal is to investigate when B executes a non-zero net motion;that is, B is able to cover any prescribed distance in a finite time. We show that, at the order δ, this happens if and only if f and B satisfy a certain condition. We also show that this is always the case if B is prevented from spinning. Finally, we provide explicit examples where the condition above is satisfied or not. All our analysis is performed in a general class of weak solutions to the coupled system body-liquid problem. © 2024, CC BY-NC-SA.

关键词： Navier Stokes equations

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Na-22 for Safeguarding and Mass Accounting of Molten Salt Systems

Na-22 for Safeguarding and Mass Accounting of Molten Salt Sy...

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2023 Transactions of the American Nuclear Society Winter Conference and Expo, ANS 2023

作者： Zile, Matthew Van Kauffman, Andrew Herminghuysen, Kevin Li, Shelly Simpson, Michael Kandlakunta, Praneeth Cao, Guoping Cao, Lei R. Nuclear Engineering Program Department of Mechanical and Aerospace Engineering Ohio State University United States Nuclear Reactor Laboratory College of Engineering Ohio State University United States Department of Materials Science and Engineering University of Utah.Idaho National Laboratory United States

The Na-22based radioactive tracer dilution (RTD) technique has been previously demonstrated for mass accounting in small quantities of clean molten salt for bench top testing. While the concept of RTD has proven to be a promising method, it has lacked further validation in large-scale quantities and in fuel-bearing salt. Towards that end, two research initiatives are on-going at The Ohio State University (OSU) and Idaho National Laboratory (INL) to address these challenges. Current work at OSU is focused on evaluating the RTD using the full gamma-ray spectrum of fission products produced by irradiating fuel bearing salt, i.e., UCl3-MgCl2-KCl in a 500-kW research reactor. The INL team has successfully demonstrated the RTD for mass determination using an 8-kg LiCl-KCl-UCl3salt for uranium electrorefining and is currentlyseeking to validate the tracer method with large(about 60 kg)molten salt system(bearing fission products) in an oxide reduction (OR) facility for spent nuclear fuel (SNF) reprocessing. © 2023 American Nuclear Society. All rights reserved.

关键词： Fission products

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Incorporation of modeling and experimentation to unveil the mechanical behavior, deformation mechanisms, and microstructure evolution of the LA103Z Mg–Li alloy under complex loading conditions

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Journal of materials Research and Technology 2025年 37卷 734-749页

作者： Yun Wang Ali Abd El-Aty Shuo Zheng Chunmei Liu Xunzhong Guo College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 China Department of Mechanical Engineering College of Engineering at Al Kharj Prince Sattam Bin Abdulaziz University Al Kharj 11942 Saudi Arabia Mechanical Engineering Department Faculty of Engineering Helwan University Cairo Egypt School of Mechanical and Electrical Engineering Suqian University Suqian 223800 China

LA103Z is a lightweight Mg–Li alloy combining exceptional strength and ductility for aerospace and defense. However, its complex deformation mechanisms require advanced processing techniques for optimized formability. Therefore, it is crucial to understand its deformation behavior, and microstructure evolution under complex loading conditions to enhance its performance and reliability in structural applications. The LA103Z Mg–Li alloy exhibited low anisotropy under uniaxial loading, on the other hand, showed significant tension-compression asymmetry under ETC loading, with a stress difference of 33.21 MPa, highlighting its sensitivity to complex loading paths. Slip activation varied with external conditions, shifting from {111} planes under uniaxial loading to {011} planes under ETC loading, increasing overall slip activity. The α-Mg phase displayed texture evolution, forming an RD-S texture under uniaxial loading with basal and pyramidal slip while shifting to TD-S under ETC loading, with a 153.56 % increase in prismatic slip activity. The β-Li phase, initially cube-textured, showed grain rotation along the rolling direction (RD) under uniaxial tension, while under ETC loading, rotation followed the <110> axes, resulting in a more dispersed texture. Finally, the Chaboche nonlinear combined hardening (CNCH) model was developed to characterize the deformation behavior of LA103Z alloy under complex loading conditions. The parameters of the developed CNCH model have been further determined through experimentation and validated through finite element modeling. The developed CNCH model effectively captured the tension-compression asymmetry and nonlinear deformation behavior of the LA103Z Mg–Li alloy, providing a reliable predictive framework for its mechanical response under complex loading conditions.

关键词： LA103Z Mg–Li alloy Deformation mechanisms Slip modes Texture evolution Hardening model

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Lightweight Dual‑Functional Segregated Nanocomposite Foams for Integrated Infrared Stealth and Absorption‑Dominant Electromagnetic Interference Shielding

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Nano-Micro Letters 2024年第11期16卷 38-55页

作者： Zhonglei Ma Ruochu Jiang Jiayao Jing Songlei Kang Li Ma Kefan Zhang Junxian Li Yu Zhang Jianbin Qin Shuhuan Yun Guangcheng Zhang MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions Shaanxi Key Laboratory of Macromolecular Science and TechnologySchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China College of Chemistry and Chemical Engineering Key Laboratory of Auxiliary Chemistry and Technology for Chemical IndustryMinistry of EducationShaanxi University of Science and TechnologyXi’an 710072People’s Republic of China Department of Mechanical and Industrial Engineering University of Toronto5 King’s College RoadTorontoON M5S 3G8Canada Chongqing Innovation Center Northwestern Polytechnical UniversityChongqing 401135People’s Republic of China

Lightweight infrared stealth and absorption-dominant electromagnetic interference(EMI)shielding materials are highly desirable in areas of aerospace,weapons,military and wearable ***,lightweight and high-efficiency dual-functional segregated nanocomposite foams with microcellular structures are developed for integrated infrared stealth and absorption-dominant EMI shielding via the efficient and scalable supercritical CO_(2)(SC-CO_(2))foaming combined with hydrogen bonding assembly and compression molding *** obtained lightweight segregated nanocomposite foams exhibit superior infrared stealth performances benefitting from the synergistic effect of highly effective thermal insulation and low infrared emissivity,and outstanding absorption-dominant EMI shielding performances attributed to the synchronous construction of microcellular structures and segregated ***,the segregated nanocomposite foams present a large radiation temperature reduction of 70.2℃ at the object temperature of 100℃,and a significantly improved EM wave absorptivity/reflectivity(A/R)ratio of 2.15 at an ultralow Ti_(3)C_(2)T_(x) content of 1.7 vol%.Moreover,the segregated nanocomposite foams exhibit outstanding working reliability and stability upon dynamic compression *** results demonstrate that the lightweight and high-efficiency dual-functional segregated nanocomposite foams have excellent potentials for infrared stealth and absorption-dominant EMI shielding applications in aerospace,weapons,military and wearable electronics.

关键词： Segregated nanocomposite foams Microcellular structures Infrared stealth EMI shielding Low infrared emissivity

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Kinetic Model on the Erosion Behavior between Refractory and Slag During Refining Process

Kinetic Model on the Erosion Behavior between Refractory and...

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第九届国际耐火材料学术会议

作者： LYU Binyu ZHANG Lifeng School of Metallurgical and Ecological Engineering University of Science and Technology Beijing School of Mechanical and Material Engineering North China University of Technology

Anindustrial-scalenumericalsimulation combining kinetics and fluid dynamics was conducted to study the evolution of MgO in slag caused by slag-refractory reactions during the refining *** Eulerian-Lagrangian multiphase approach. The interface between different phases was described using the Volume of Fluid model. The simulation of the motion of argon bubbles was tracked with the method of the Discrete Phase Model. Moreover, the composition transformation of slag, slag, and refractory was predicted by employing a kinetic model based on the coupled reactions model. The dynamic evolution of the slag-refractory was calculated using user defined functions based on an industrial *** trials were carried out to verify the *** larger argon flow rate expanded the volume of the plume region in the molten steel and the area of the open-eye of the molten slag. During the ladle furnace refining process, the physical dissolution of MgO in to slag occurred at the slag-refractory interface,resulting in that the total MgO in the slag increased from 7.74% to 8.6%. the mass transfer rate is higher at the argon blowing point at the slag-refractory interface, which reached 0.0017 m/s. and the MgO content transferred from refractory to slag is higher at the slag-refractory interface and could reach 9.0%after 1100 s reaction.

关键词： Numerical simulation Kinetic model Ladle refining Refractory

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Insight into the Excellent Tribological Performance of Highly Oriented Poly(phenylene sulfide)

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Chinese Journal of Polymer science 2022年第3期40卷 290-298,I0007页

作者： Liang-Qing Zhang Shu-Gui Yang Jing-Han Zhang Ke-Peng Zhong Zhong-Guo Zhao Yan-Hui Chen Jun Lei Qiu-Yu Zhang Zhong-Ming Li College of Material Science and Engineering Xi’an University of Science and TechnologyXi’an 710054China State Key Laboratory for Mechanical Behaviour of Materials Shaanxi International Research Center for Soft MaterialsXi’an Jiaotong UniversityXi’an 710049China School of Chemistry and Chemical Engineering Shaanxi Key Laboratory of Macromolecular Science and TechnologyKey Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information TechnologyNorthwestern Polytechnical UniversityXi’an 710072China National and Local Engineering Laboratory for Slag Comprehensive Utilization and Environment Technology School of Materials Science and EngineeringShaanxi University of TechnologyHanzhong 723000China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610065China

Achieving low friction and wear of poly(phenylene sulfide)(PPS) without using fillers or blending is a challenging task, but one of considerable practical importance. Here we describe how neat PPS with high tribological performance is achieved by manipulating processing parameters(pressure, flow and temperature). The key to achieving high tribological performance is comparatively high molecular chain orientation, realized in neat PPS, at high shear rates and low pressure. The friction coefficient and wear rate are as low as ~0.3 and~10^(-6) mm^(3)·N^(-1)·m^(-1), respectively, which break the record for neat PPS. These values are even better than those for PPS-based blends and comparable to PPS composites. Further studies show, for the first time, that wear rate decreases exponentially with increasing molecular chain orientation, prompting us to revise the classical Archard's law by including the effect of molecular chain orientation. These findings open the possibility of using neat PPS in highly demanding tribological applications.

关键词： Poly(phenylene sulfide) Orientation Wear rate Frication coefficient Processing parameters

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Corrosion mechanism of Mg alloys involving elongated long-period stacking ordered phase and intragranular lamellar structure

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Journal of materials science & Technology 2023年第20期151卷 190-203页

作者： Jinshu Xie Jinghuai Zhang Zhi Zhang Zijian Yu Zhihao Xu Ru Wang Daqing Fang Xiaobo Zhang Xiaoru Zhang Ruizhi Wu Key Laboratory of Superlight Material and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of TechnologyNanjing 211167China

It is a long-term challenge to further improve the corrosion resistance while ensuring the strength of magnesium(Mg)*** the effect of potential fluctuation on the micro-galvanic corrosion and the subsequent film formation is important for understanding the corrosion mechanism of Mg alloys with multiple strengthening phases/***,we prepared the high-strength Mg-14.4Er-1.44Zn-0.3Zr(wt.%)alloys containing hybrid structures,i.e.,elongated long-period stacking ordered(LPSO)blocks+intragranular stacking faults(SFs)/LPSO *** Mg alloy with elongated LPSO blocks and intragranular LPSO lamellae(EZ-500 alloy)obtains good corrosion resistance(2.2 mm y^(–1)),while the Mg alloy containing elongated LPSO blocks and intragranular SFs(EZ-400 alloy)shows a significantly higher corrosion rate(6.9 mm y^(–1)).The results of scanning Kelvin probe force microscopy(SKPFM)show the elongated LPSO blocks act as cathode phase(87 mV in EZ-400 alloy),and the SFs serve as the weak anode(30 mV in EZ-400 alloy),resulting in high potential fluctuation in EZ-400 *** the contrary,both elongated blocks and intragranular lamellae are cathodic LPSO phase(67–69 mV)in EZ-500 alloy,leading to a lower potential *** in-situ atomic force microscope(AFM)observation indicates that high potential fluctuation would cause strong micro-galvanic corrosion,and subsequently leads to the failure in rapid formation of corrosion film,finally forming a loose and porous film,while relatively low potential fluctuation could result in more uniform corrosion mode and facilitate the rapid formation of protective ***,we propose that it is an effective way to develop high-strength corrosionresistant Mg alloys by controlling the potential fluctuation to form a“uniform potential”strengthening microstructure。

关键词： Mg alloys Stacking faults LPSO phase SKPFM Quasi in-situ AFM Corrosion behavior Potential fluctuation

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