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SSRN 2024年

作者： Cai, Zhen Zhang, Fanhang Tan, Yuan Kessler, Stephan Fottner, Johannes Technical University of Munich Materials Handling Material Flow Logistics Garching Germany Technical University of Munich School of Computation Information and Technology Garching Germany Technical University of Munich Process Systems Engineering Freising Germany

Automated guided vehicle (AGV), which was initially designed for indoor operations in industry, has been increasingly applied in outdoor heavy-duty logistics tasks. In typical navigation tasks, such as the autonomous tracking of a designated object or a person, relative angle and relative distance between AGV and the target is required. To obtain the necessary information, various on-board sensors are extensively integrated. In this paper, the reliability of measuring the relative angle with the Angle-of-Arrival (AoA) method with two different Internet of Things (IoT) sensor sets from Texas Instrument (TI) and u-blox, according to Bluetooth 5.1 was investigated. The performance of IoT sensors was validated with angle accuracy parameters and received signal strength indicator (RSSI). The better IoT sensor was then integrated into the AGV navigation system, and the information gathered from IoT sensor enabled the AGV to turn toward the direction of the target. The process of AGV turning to the targeted direction based on IoT sensor information was respectively tested in the simulation and actual environment and evaluated by the disparity between the real relative angle and the rotation angle of the AGV. The results showed that this disparity was within ±5° in both simulated and actual environments, and methods for higher accuracy were proposed. © 2024, The Authors. All rights reserved.

关键词： Internet of things

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Synthesis of Polyurethane/Poly(urea-formaldehyde) Double-shelled Microcapsules for Self-healing Anticorrosion Coatings

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Chinese Journal of Polymer Science 2020年第1期38卷 45-52,I0006页

作者： Yan Song Kai-Feng Chen Jing-Jing Wang Yuan Liu Tao Qi Guo Liang Li National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing WO 190China Xiamen Advanced Materials Academy of Luoyang Ship Material Research Institute Xiamen 361101China Science and Technology on Marine Corrosion and Protection Laboratory Qingdao 266101China

One-component, catalyst-free self-healing coatings with double-shelled polymer microcapsules have drawn considerable attention due to wide applications. In this work, the synthesis parameters of double-shelled polymer microcapsules and the mechanism of the self-healing process were systematically investigated. Apart from the chemical structure of the microcapsule shell, the shell thickness, the microcapsule size,and the core fraction could affect the self-healing anticorrosion properties. The synthesis parameters were further optimized in terms of the agitation rate, p H, weight ratio of core to shell, and temperature. Under these conditions, the microcapsule shell consisting of a rough surface formed by poly(urea-formaldehyde) and a smooth inner wall by polyurethane was prepared. The size of the microcapsules and core fraction were calculated to be approximately 30 μm and 75%, respectively. The self-healing anticorrosion coating incorporating as-synthesized microcapsules exhibited corrosion resistance in artificially scratched areas, which was further characterized by electrochemical impedance spectroscopy.

关键词： Double-shelled Microcapsules Anticorrosion Self-healing

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Actuation performances of catkin fibers reinforced thiol-acrylate main-chain liquid crystalline elastomer

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International Journal of Smart and Nano materials 2022年第4期13卷 668-690页

作者： Liru Yao Huixuan Yan Yifan He Nan Zhao Xiuxiu Wang Chensha Li Liguo Sun Yang He Yanju Liu Jianqi Zhang Key Laboratory of Functional Inorganic Material Chemistry Ministry of Education of the People’s Republic of China Heilongjiang University 150080HarbinP.R.China Institute of regulatory science Beijing Technology and Business University 100048BeijingP.R.China Key Laboratory of Chemical Engineering Process and Technology for High-Efficiency Conversion School of Chemistry and Material Science Heilongjiang University 150080HarbinP.R.China Center for Composite Materials and Structures Harbin Institute of Technology(HIT)150080HarbinP.R.China Department of Astronautical Science and Mechanics Harbin Institute of Technology(HIT)150001HarbinP.R.China Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology 100190BejingP.R.China

Liquid crystalline elastomers(LCEs)have been utilized as an important class of smart actuator ***,the modest actuation mechanical and robustness performances remain a *** by the specific structures,well mechanical properties and physico-chemical characteristics of some natural plant fibers,a composite of thiol-acrylate main-chain LCE matrix incorporated with catkin fibers is designed and *** catkin fibers build a network as reinforcement phase,and demon-strate effective compatibility and integration property with the matrix,their high flexibility can be adapted to the large deforma-tional performance of LCE *** prepared LCE composite demonstrates strong mechanical actuation *** mod-ulus and driving force triggered by the stimuli are obviously *** tensile strength and fatigue failure resistant prop-erty under high loadings and repeated cycles of thermal actua-tion or photothermal actuation are greatly *** the stimulus response deformation rate,phase transition temperature and liquid crystal phase structure of the LCE matrix,and so on,do not weaken or *** work promotes the LCE materi-als’application potential and broadens the application value of natural plant fibers.

关键词： Liquid crystalline elastomer catkin fibers reinforcement materials smart composites mechanical actuation

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Microstructural evolution of Mg-14Gd-0.4Zr alloy during compressive creep

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Journal of Magnesium and Alloys 2023年第9期11卷 3161-3173页

作者： Hui Shi Yuanding Huang Lixiang Yang Chunquan Liu Hajo Dieringa Chong Lu Lv Xiao Regine Willumeit-Römer Norbert Hort Institute of Metallic Biomaterials Helmholtz-Zentrum HereonMax-Planck-Str.1Geesthacht 21502Germany Research and Development Center Shanghai Spaceflight Precision Machinery Research InstituteShanghai 201600China School of Mechanical Engineering Guizhou UniversityGuiyang 550025China Institute of Material and Process Design Helmholtz-Zentrum HereonMax-Planck-Str.1Geesthacht 21502Germany The Instrument Analysis Center Shanghai Jiaotong UniversityShanghai 200240China Institute of Product Technology and Systems Leuphana University LüneburgUniversitätsallee 1Lüneburg D 21335Germany

The present work reports the creep behavior and microstructural evolution of the sand-cast Mg-14Gd-0.4Zr alloy(wt.%) prepared by the differential pressure casting machine. Their compressive creep tests at 250 ℃ were performed under various applied stresses(i.e., 60, 80 and100 MPa). Among them, the sand-cast Mg-14Gd-0.4Zr samples examined under 250 ℃/80 MPa for 39 and 95 h, respectively, were chosen to systemically analyze their creep mechanisms using high-angle annular dark field-scanning transmission electron microscopy(HAADF-STEM).The obtained results showed that the enhancement of creep resistance can be mainly attributed to the coherent β' and β'_F phases with an alternate distribution, effectively impeding the basal dislocations movement. However, with the creep time increasing, the fine β'+β'_F precipitate chains coarsened and transformed to semi-coherent β_1 phase and even to large incoherent β phase(surrounded by precipitate-free areas) in grain interiors. The precipitate-free zones(PFZs) at grain boundaries(GBs) were formed, and they could expand during creep deformation. Apart from the main cross-slip of basal and prismatic dislocations, type dislocations were activated and tended to distribute near the GBs. The aforementioned phenomena induced the stress concentrations, consequently leading to the increment of the creep strain.

关键词： Magnesium alloys Creep property Microstructures Precipitate chains Dislocation

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Vapor phase epitaxy of PbS single-crystal films on water-soluble substrates and application to photodetectors

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Nano Research 2022年第6期15卷 5402-5409页

作者： Yifan Wang Jing Xia Xuanze Li Fan Ru Xue Chen Ze Hua Ruiwen Shao Xuecong Wang Wenjun Zhang Chun-Sing Lee Xiangmin Meng Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Institute of Process Engineering Chinese Academy of SciencesBeijing 100190China Centre of Material Science and Optoelectronic Engineering University of Chinese Academy of SciencesBeijing 10049China Engineering Research Center for Semiconductor Integrated Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Analysis&Testing Center Beijing Institute of TechnologyBeijing 102488China Beijing Advanced Innovation Center for Intelligent Robots and Systems and Institute of Convergence in Medicine and Engineering Beijing Institute of TechnologyBeijing 100081China Center of Super-Diamond and Advanced Films(COSADF)and Department of Materials Science and Engineering City University of Hong KongHong KongChina Center of Super-Diamond and Advanced Films(COSDAF)and Department of Chemistry City University of Hong KongHong KongChina

Lead sulfide(PbS),a typical functional semiconductor material,has attracted serious attention due to its great potential in optoelectronics ***,controllable growth of PbS single-crystal film still remains a great ***,we report heteroepitaxial growth of large-scale highly crystalline PbS films on alkali salt(NaCl and KCl)substrates via chemical vapor deposition(CVD).Structural characterizations demonstrate that the as-grown PbS films exhibit an atomically sharp interface with the underlying *** epitaxial relationships between the epilayers and substrates were determined to be PbS(100)//NaCl(100)or KCl(100),PbS[010]//NaCl[010]or KCl[010].Owing to the high solubility of alkali salt,the epitaxial PbS films can be rapidly released from the underlying substrates and transferred to other substrates of interest while maintaining good integrity and crystallinity,the process of which is particularly attractive in the fields of electronics and ***,photodetectors based on the transferred PbS films were fabricated,exhibiting a high photoresponsivity of 7.5 A/W,a detectivity of 1.44×10^(12)Jones,and a rapid response time of approximately 0.25 *** work sheds light on the batch production,green transfer,and optoelectronic application of PbS films.

关键词： heteroepitaxial growth lead sulfide(PbS) single-crystal film photodetector transferable

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Functionally graded structure of a nitride-strengthened Mg_(2)Si-based hybrid composite

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Journal of Magnesium and Alloys 2024年第3期12卷 1239-1256页

作者： Jeongho Yang Woongbeom Heogh Hogi Ju Sukhyun Kang Tae-Sik Jang Hyun-Do Jung Mohammad Jahazi Seung Chul Han Seong Je Park Hyoung Seop Kim Susmita Bose Amit Bandyopadhyay Martin Byung-Guk Jun Young Won Kim Dae-kyeom Kim Rigoberto CAdvincula Clodualdo Aranas Jr Sang Hoon Kim School of Mechanical Engineering Pusan National UniversityBusan 46241Republic of Korea Department of Mechanical Design Engineering Hanyang UniversitySeoul 04763Republic of Korea Process Research 3 Team LG Display Co.Ltd.PajuGyeonggi-do 10845Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea Institute of Well-Aging Medicare&Chosun University LAMP Center Chosun UniversityGwangju 61452Republic of Korea Division of Materials Science and Engineering Hanyang UniversitySeoul 04763Republic of Korea Department of Mechanical Engineering École de Technologie SupérieureMontrealQuebec H3C 1K3Canada Material&Component Convergence R&D Center Korea Construction Equipment Technology InstituteGunsanJeollabuk-do 54002Republic of Korea School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore 639798Singapore Graduate Institute of Ferrous&Eco Materials Technology Pohang University of Science and TechnologyPohangGyeongsangbuk-do 37673Republic of Korea Advanced Institute for Materials Research Tohoku UniversitySendai 980-8577Japan Institute for Convergence Research and Education in Advanced Technology Yonsei UniversitySeoul 03722Republic of Korea School of Mechanical and Materials Engineering Washington State UniversityPullmanWashington 99164USA School of Mechanical Engineering Purdue UniversityWest LafayetteIndiana 47907USA Research Institute of Advanced Manufacturing Technology Korea Institute of Industrial TechnologyIncheon 21999Republic of Korea Department of Macromolecular Science and Engineering Case Western Reserve UniversityClevelandOhio 44106USA Department of Chemical and Biomolecular Engineering and Joint Institute for Advanced Materials University of TennesseeKnoxvilleTennessee 37996USA Center for Nanophase Materials and Sciences Oak Ridge National LaboratoryOak RidgeTennessee 37830USA Department of Mechanical Engineering University of New BrunswickFrederictonNew Brunswick E3B 5A3Cana

The ex-situ incorporation of the secondary SiC reinforcement,along with the in-situ incorporation of the tertiary and quaternary Mg_(3)N_(2) and Si_(3)N_(4) phases,in the primary matrix of Mg_(2)Si is employed in order to provide ultimate wear resistance based on the laser-irradiation-induced inclusion of N_(2) gas during laser powder bed *** is substantialized based on both the thermal diffusion-and chemical reactionbased metallurgy of the Mg_(2)Si–SiC/nitride hybrid *** study also proposes a functional platform for systematically modulating a functionally graded structure and modeling build-direction-dependent architectonics during additive *** strategy enables the development of a compositional gradient from the center to the edge of each melt pool of the Mg_(2)Si–SiC/nitride hybrid ***,the coefficient of friction of the hybrid composite exhibits a 309.3%decrease to–1.67 compared to–0.54 for the conventional nonreinforced Mg_(2)Si structure,while the tensile strength exhibits a 171.3%increase to 831.5 MPa compared to 485.3 MPa for the conventional *** outstanding mechanical behavior is due to the(1)the complementary and synergistic reinforcement effects of the SiC and nitride compounds,each of which possesses an intrinsically high hardness,and(2)the strong adhesion of these compounds to the Mg_(2)Si matrix despite their small sizes and low concentrations.

关键词： Laser powder bed fusion Mg_(2)Si-SiC/nitride hybrid composite Both the thermal diffusion-and chemical reaction-based metallurgy Functionally graded structure Compositional gradient Wear resistance.

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Redox-responsive micelles integrating catalytic nanomedicine and selective chemotherapy for effective tumor treatment

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Chinese Chemical Letters 2021年第10期32卷 3076-3082页

作者： Ronghua Jin Zhongning Liu Tao Liu Pingyun Yuan Yongkang Bai Xin Chen School of Chemical Engineering and Technology Shaanxi Key Laboratory of Energy Chemical Process IntensificationInstitute of Polymer Science in Chemical EngineeringXi'an Jiao Tong UniversityXi’an 710049China Pharmaceutical College Guangxi Medical UniversityBeijing 100081China Department of Prosthodontics Peking University School and Hospital of StomatologyNational Engineering Laboratory for Digital and Material Technology of StomatologyBeijing Key Laboratory of Digital StomatologyNanning 530021China

Chemotherapy is one of the most conventional modalities for cancer ***,the high multidrug resistance of tumor cells still limited the clinical application of current *** the ability of nitric oxide(NO) to modulate potent P-glycoprotein to inhibit multi-drug resistance,a synergistic methodology combining chemotherapy and sustained NO generation is an ideal way to further promote the ***,a multi-functional micelle with tumor-selective chemotherapy driven by redox-triggered doxorubicin(DOX) release and drug resistance inhibition based on intracellular NO generation was fabricated for effective tumor *** micelle consists of DOX as core,arginine/glucose oxidase(Arg/GOx) as shell and redox-responsive disulfide bond as a linker,which is denoted as *** Arg serves as the biological precursor of nitric oxide for inhibition of multi-drug resistance to promote chemotherapy and GOx catalyzes glucose to produce hydrogen peroxide(H_(2) O_(2)) for increasing the generation of ***,the glucose supply could be simultaneously blocked by the catalytic process,which further enhanced therapeutic *** micelle requests a tumor-specific microenvironment(a considerable amount of GSH) to perform synergistic therapeutics including chemotherapy,starvation therapy(catalytic medicine),and gas therapy for tumor treatment,which resulted in significant cytotoxicity to tumor tissue.

关键词： Chemotherapy Gas therapy Starvation therapy Carrier-free Tumor treatment

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Microstructural Evolution and Carbides Precipitation Behavior and Their Effects on Mechanical Property of Nb-Ti Microalloyed Fb590 Steel

SSRN

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SSRN 2024年

作者： Zheng, Yaxu Chu, Shaokang Yang, Qin Lin, Yu Zhu, Liguang Li, Yongliang Guo, Zhihong Zhang, Di Cao, Ruifang Feng, Jie Wang, Bo School of Material Science and Engineering Hebei Short Process Steel Making Technology Innovation Center Hebei Key Laboratory of Material Near-Net Forming Technology Hebei University of Science and Technology Shijiazhuang050018 China QuesTek Innovations EvanstonIL United States College of Materials Science and Engineering Chongqing University Chongqing400045 China Rolling operation department Beijing Shougang Co. LTD. Tangshan064404 China Hebei University of Science and Technology China

Ferrite-bainite dual phase steels have been widely used in automobile manufacturing industry due to their high strength and excellent hole expansion performance. In this study, the effects of coiling temperature on mechanical properties and hole expansion performance of low carbon Nb-Ti micro-alloyed FB590 ferrite-bainite steel have been studied. Additionally,, the microstructure evolution and carbide precipitation behavior during hot rolling and coiling processes have been investigated. The influence mechanism of microstructures and carbides on both mechanical properties and hole expansion performance has also been discussed. The results suggest that the fraction of the retained austenite and the martensite decreases gradually with increasing coiling temperatures from 450℃ to 500℃. The main reason for the formation of martensite and retained austenite in steel 1# coiled at 450℃ is that the coiling temperature is in the martensitic transformation range. Increasing the coiling temperature to 500℃ which is above the Ms leads to ferritic and bainitic structure. The carbides precipitation behavior has been studied by TEM, thermodynamic and kinetics calculation. The results show that the size of the carbides increases with increasing coiling temperatures from 450°C to 500°C. Most of the large size carbides above 100 nm with high percent of Ti are the undissolved particles in austenite during slab heating. The medium size particles between 10 nm and 100 nm precipitate during hot rolling. The small size carbides below 10 nm with high percent of Nb precipitate during coiling. The strength of the steel is effectively increased by the fine carbides and martensite formed at low coiling temperature of 450°C. However, the fine carbides, martensite and residual austenite are bad for plasticity and hole expansion performance. Raising the coiling temperature of FB590 steel from 450℃ to 500°C can effectively reduce the content of martensite and retained austenite in the steel. Altho

关键词： Microalloying

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Enhancing Lithium Recycling Efficiency in Pyrometallurgical processing through Thermodynamic-Based Optimization and Design of Spent Lithium-Ion Battery Slag Compositions

ACS Sustainable Resource Management

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ACS Sustainable Resource Management 2024年第6期1卷 1170-1184页

作者： Haojie Li Hao Qiu Marko Ranneberg Hugo Lucas Torsten Graupner Bernd Friedrich Bengi Yagmurlu Daniel Goldmann Jens Bremer Michael Fischlschweiger Chair of Technical Thermodynamics and Energy Efficient Material Treatment Institute of Energy Process Engineering and Fuel Technology Clausthal University of Technology Agricolastraße 4 38678 Clausthal-Zellerfeld Germany Department of Mineral and Waste Processing Institute of Mineral and Waste Processing Clausthal University of Technology Walther-Nernst-Str. 9 38678 Clausthal-Zellerfeld Germany Federal Institute for Geosciences and Natural Resources (BGR) Stilleweg 2 30655 Hannover Germany Institute of Process Metallurgy and Metal Recycling (IME) RWTH Aachen University Intzestr. 3 52056 Aachen Germany Institute of Chemical and Electrochemical Process Engineering Clausthal University of Technology Leibnizstr. 17 38678 Clausthal-Zellerfeld Germany

The increasing demand for lithium in lithium-ion battery (LIB) applications necessitates innovative recycling strategies. Combined pyrometallurgical–hydrometallurgical recycling has gained increased attention for lithium recovery from slags. One challenge in the technological advancement of recycling lithium from spent LIBs with lithium-nickel-manganese-cobalt-oxide cathodes (NMC), characterized by a Li–Al–Si–Ca–Mn–O slag system, lies in the distribution of lithium across multiple silicate and oxide phases. Hence, the goal of this work is to significantly enrich the lithium in the single target phase γ-LiAlO2with thermodynamic-based optimization for tailored slag designs. This is achieved by coupling a sophisticated thermodynamic database and model reassessment related to practical NMC-type LIB slag system composition fields with Pareto optimization. Extensive experimental investigations are performed for model and design validations, and procedures for selecting the best phase candidates with individual lithium content are systematically presented. A strong nonlinear influence of CaO on the formation of the target product γ-LiAlO2could be revealed, where the addition of SiO2for lithium slagging needs to be limited to enrich lithium in the target phase. Higher amounts of added CaO and SiO2, such as both at 30 wt %, result in the undesired transfer of lithium into other Li-containing phases. Based on this approach, an artificial slag is computationally designed for the first time, where theoretically 100% of the lithium is trapped in γ-LiAlO2. After production of this slag and experimental analysis, it was found that 96% of lithium was transferred into γ-LiAlO2. This demonstrates the great potential of thermodynamics-based artificial slag design for enhancing lithium recycling efficiency in LIB recycling *** investigation presents a path for lithium enrichment in the target phase γ-LiAlO2via thermodynamic-based optimization and demonstrates the potential o

关键词： Chemical composition Lithium Show More

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Research on the Strengthening Mechanism of Nb-Ti Microalloyed Ultra Low Carbon If Steel

SSRN

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SSRN 2024年

作者： Zheng, Yaxu Wang, Kun Yang, Qin Lin, Yu Zhu, Liguang Wu, Xiaoyan Han, Baochen Wang, Bo Zhang, Di Feng, Jie Cao, Ruifang School of Material Science and Engineering Hebei Short Process Steel Making Technology Innovation Center Hebei Key Laboratory of Material Near-Net Forming Technology Hebei University of Science and Technology Shijiazhuang050018 China QuesTek Innovations EvanstonIL United States College of Materials Science and Engineering Chongqing University Chongqing400045 China Rolling Operation Department Beijing Shougang Co. LTD. Tangshan064404 China

The microstructure evolution and carbides precipitation behavior during the hot rolling, cold rolling and annealing processes have been studied. The results indicates that the addition of Nb into Ti bearing IF steel promotes the recrystallization at 900 ℃ and obtains fine recrystallized grains. Based on the fine and uniform original structure, Nb-Ti microalloyed steel obtains fine structure after cold rolling and annealing. The study results of the carbides precipitation behavior suggests that the TiN precipitates at high temperature above 1100 ℃, and a large amount of (Nb,Ti)C and TiC precipitate at about 900 ℃ in Nb-Ti and Ti bearing steels, respectively. There is no significantly difference between the amount of carbides in hot deformed steels at 900 ℃ and the hot rolled plates, which indicates that the carbides mainly precipitate during the hot rolling process due to the ultra low carbon and nitrogen content in the steel. However, there is few carbides precipitate during the coiling process at 600 ℃. The thermodynamic and kinetic calculation results are consistent with the TEM observation results. In Nb-Ti containing steel, the solid solution of Nb and Ti elements are significantly reduced due to the large amount precipitation of (Nb,Ti)C during the final rolling process, which effectively promotes the recrystallization of austenite. Therefore, the grains of hot-rolled, cold-rolled, and annealed strips are refined, and the fine-grained strengthening effect is improved. Finally, the strength of Nb-Ti containing steel is higher than that of Ti containing steel. © 2024, The Authors. All rights reserved.

关键词： Microalloying

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