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SSRN 2023年

作者： Jeyalakshmi, P. Ramkumar, P. Advanced Tribology Research Lab Machine Design Section Department of Mechanical Engineering Indian Institute of Technology Madras India

Corrosion is a critical parameter for bio-implants and in this study to minimize corrosion, thermal oxidation was performed on micro-blasted Ti6Al4V surfaces for 24 and 48 hours. The electrochemical performance was studied in 0.9 wt.% NaCl. The combined mechanical and thermal process increases surface roughness and improves hydrophilic nature on Ti6Al4V surface. The formation of metastable Ti2O3 during micro-blasting and further transformation of anatase and rutile TiO2 during thermal oxidation increases the corrosion resistance. Overall, micro-blasting with 48-hour thermal oxidation showed 3 times higher corrosion resistance and reduced corrosion rate by almost 50% as compared with the untreated Ti6Al4V. © 2023, The Authors. All rights reserved.

关键词： Titanium dioxide

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Information Flow in Digital Twin for “Detection to Repair” of Defects Using Additive Manufacturing

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IFAC-PapersOnLine 2024年第19期58卷 736-741页

作者： Dylan Bender Jordan Anderson Mike Gilbert Ahmad Barari Advanced Digital Design Manufacturing and Metrology Laboratories (AD2MLabs) Department of Mechanical and Manufacturing Engineering Ontario Tech University Canada Innovation Development - X-Lab Ontario Power Generation

Digitalization in inspection and manufacturing results in a wide range of advantages including the reduction of cost, complexity, and operation time, and increasing the flexibility, level of automation, and the capabilities to gain intelligence. This paper discusses an attractive benefit of digitalization which allows the integration of the information flow and control for the two processes of digital inspection and additive manufacturing. A digital twin of the additive manufacturing process is dynamically updated based on the intermittent inspection data obtained from the workpiece to integrate the information of the digital model for planning and controlling additive manufacturing process. The ultimate objective is to repair highly expensive, and large components in industrial sectors. The developed digital twin for this integrated system includes eight activities are demonstrated through an industrial case study.

关键词： Digital Inspection Digital Manufacturing Additive Manufacturing Manufacturing Information Control Defect Detection Repair Integrated Inspection Systems

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3D-Printed Stainless Steel Electrodes for Advancing Mems Microbial Fuel Cells Toward Sustainable on-chip Energy 38

3D-Printed Stainless Steel Electrodes for Advancing Mems Mic...

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38th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2025

作者： Elhadad, Anwar Li, Guangfa Yang, Jiaqi Liu, Dehao Choi, Seokheun State University of New York at Binghamton Integrated Computational Materials Design Lab Department of Mechanical Engineering BinghamtonNY United States State University of New York at Binghamton Bioelectronics & Microsystems Laboratory Department of Electrical & Computer Engineering BinghamtonNY United States State University of New York at Binghamton Center for Research in Advanced Sensing Technologies and Environmental Sustainability BinghamtonNY United States

ISBN: (纸本)9798331508890

This study introduces a stainless steel microbial anode fabricated via advanced laser powder bed fusion, marking a transformative step in microbial fuel cell (MFC) technology. By leveraging this cutting-edge metal 3D printing approach, we achieve a 3D microporous structure with superior electrical conductivity, outstanding corrosion resistance in aquatic environments, robust mechanical strength, and adaptability for surface modification - essential attributes for sustainable, high-performance MFCs. The assembled MFC demonstrates unparalleled power output, along with exceptional durability and stability over multiple cycles, outperforming existing MFCs based on alternative 3D-printed substrates. This advancement not only solidifies the role of MFCs as a sustainable energy solution for powering on-chip electronics but also opens new avenues for scalable, cost-effective bioelectronic systems that align with the demands of next-generation technology. © 2025 IEEE.

关键词： Corrosion resistance

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3D/4D additive-subtractive manufacturing of heterogeneous ceramics

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Journal of Materials Science & Technology 2024年第34期201卷 210-221页

作者： Guo Liu Xinya Lu Xiaofeng Zhang Yan Zhao Shenghui Yi Jingjun Xu Yuqi Zhan Jianan Yin Chengcheng Feng Zhifeng Zhou Peiyu Wang Zhou Chen Yunhu He Siyao Chen Pengchao Liu Jun Zuo Yu Dai Jian Wu Sida Liu Jian Lu Centre for Advanced Structural Materials City University of Hong Kong Shenzhen Research InstituteGreater Bay Joint DivisionShenyang National Laboratory for Materials ScienceShenzhen 518057China CityU-Shenzhen Futian Research Institute Shenzhen 518045China Hong Kong Branch of National Precious Metals Material Engineering Research Center City University of Hong KongHong Kong 999077China Department of Mechanical Engineering City University of Hong KongHong Kong 999077China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China National Engineering Laboratory for Modern Materials Surface Engineering Technology&The Key Lab of Guangdong for Modern Surface Engineering Technology Institute of New MaterialsGuangdong Academy of ScienceGuangzhou 510650China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China Faculty of Materials Science Shenzhen MSU-BIT UniversityShenzhen 518100China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Physics and Materials Nanchang UniversityNanchang 330031China

The manufacturing of heterogeneous high-temperature material components is challenging for use in practical ***-dimensional(3D)printing provides solutions to programmable constructing ceramic ***,the development of heterogeneous ceramics is limited by low flexibil-ity of heterogeneity,geometrical complexity,structural resolution,manufacturing efficiency,and mate-rial *** this study,we demonstrated flexible and rapid approaches for fabricating complicated and precise heterogeneous ceramics by shape-changing(4D)or shape-keeping(3D)additive-subtractive manufacturing(ASM)*** shape-changing strategy for heterogeneous ceramics was achieved by global ceramization of heterogeneous precursors,while the shape-keeping strategy for heterogeneous ceramics was achieved by local receramization of homogeneous *** element analysis(FEA)simulations of the influence of the thermal shrinkage dominant in the shape-changing strategy on the shape deformation of heterogeneous ceramics could be valuable predictions of the experimental *** 3D/4D ASM methods are generic for high-temperature materials and extendable to metallic and dia-mond materials.

关键词： 3D/4D printing Additive-subtractive manufacturing Heterogeneous ceramics Elastomer-derived ceramics Local receramization

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Optimization and Modeling of Heat Dissipation Structure of Three-phase Integrated Transformer 3

Optimization and Modeling of Heat Dissipation Structure of T...

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3rd IEEE China International Youth Conference on Electrical engineering, CIYCEE 2022

作者： Tang, Ziyan Guan, Jiajia Yan, Yiyang Chen, Cai Kang, Yong Li, Rui Li, Peng Cai, Jiuqing Jin, Xiang Chen, Jing Yang, Lei Advanced Semiconductor Packaging and Integration Lab School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Wuhan Second Ship Design and Research Institute Wuhan430205 China

ISBN: (数字)9781665477321

ISBN: (纸本)9781665477321

The three-phase integrated transformer can reduce the volume of magnetic components and improve the power density of the three-phase isolation topology system. The heat dissipation design of high frequency transformer is a key technology that affects its efficiency, insulation life, and power density. In this paper, the loss of the three-phase integrated transformer is calculated based on the Dowell and iGSE model. An optimized heat dissipation structure is proposed based on temperature rise distribution. A thermal resistance model is established and verified by thermal simulation using Flotherm XT. The results show that the transformer temperature rise of the optimized heat dissipation structure is reduced by 10.7 °C compared with the traditional heat dissipation structure. The error between the established thermal resistance model and the simulation is within 5%. © 2022 IEEE.

关键词： Heat resistance

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Analysis and Solution of Voltage Overshoot of Keep-Off State Devices in Three Level Simplified Neutral Point Clamped Inverter 3

Analysis and Solution of Voltage Overshoot of Keep-Off State...

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3rd IEEE China International Youth Conference on Electrical engineering, CIYCEE 2022

作者： Guo, Xinyue Liu, Menghu Guan, Jiajia Chen, Cai Kang, Yong Li, Rui Li, Peng Cai, Jiuqing Jin, Xiang Chen, Jing Yang, Lei Advanced Semiconductor Packaging and Integration Lab School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Wuhan Second Ship Design and Research Institute Wuhan430205 China

ISBN: (数字)9781665477321

ISBN: (纸本)9781665477321

This paper demonstrates a unique voltage overshoot phenomenon of keep-off state devices in three level simplified neutral point clamped (3L-SNPC) inverter which comprises a DC-DC chopper and a three-phase two-level (2L) inverter. The issue is found to be related to the switching action of the DC-DC chopper and will introduce voltage overshoot on the constant keep-off state devices in the 2L-inverter. The switching transients of different switching cases are analyzed to reveal the mechanism of the voltage overshoot phenomenon. Based on the analysis, a snubber circuit is used to suppress the voltage overshoot. Simulations using LTspice software validate the analysis and the solution. © 2022 IEEE.

关键词： Timing circuits

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Microstructure,mechanical properties and fracture behaviors of large-scale sand-cast Mg-3Y-2Gd-1Nd-0.4Zr alloy

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Journal of Magnesium and Alloys 2023年第8期11卷 2763-2775页

作者： Lixiang Yang Yuanding Huang Zhengquan Hou Lv Xiao Yuling Xu Xiwang Dong Fei Li Gerrit Kurz Baode Sun Zhongquan Li Norbert Hort Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming and State Key Lab of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China MagIC-Magnesium Innovation Centre and Institute of Metallic Biomaterials Helmholtz-Zentrum HereonMax-Planck Straße 121502 GeesthachtGermany Shanghai Spaceflight Precision Machinery Research Institute Shanghai 201600China Institute of Material and Process Design Helmholtz-Zentrum HereonMax-Planck Straße 121502 GeesthachtGermany

In order to improve the ductility of commercial WE43 alloy and reduce its cost,a Mg-3Y-2Gd-1Nd-0.4Zr alloy with a low amount of rare earths was developed and prepared by sand casting with a differential pressure casting *** microstructure,mechanical properties and fracture behaviors in the as-cast,solution-treated and as-aged states were *** is found that the aged alloy exhibited excellent comprehensive mechanical properties owing to the fine dense plate-shapedβ'precipitates formed on prismatic habits during aging at 200℃for 192 hrs after solution-treated at 500℃for 24 *** ultimate tensile strength,yield strength,and elongation at ambient temperature reach to 319±10 MPa,202±2 MPa and 8.7±0.3%as well as 230±4 MPa,155±1 MPa and 16.0±0.5%at 250℃.The fracture mode of as-aged alloy was transferred from cleavage at room temperature to quasi-cleavage and ductile fracture at the test temperature 300℃.The properties of large-scale components fabricated using the developed Mg-3Y-2Gd-1Nd-0.4Zr alloy are better than those of commercial WE43 alloy,suggesting that the new developed alloy is a good candidate to fabricate the large complex thin-walled components.

关键词： Magnesium alloy WE43 Large-scale sand-cast Ductility

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Intrinsic and extrinsic anomalous transport properties in noncollinear antiferromagnetic Mn3Sn from first-principles calculations

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Physical Review B 2024年第21期109卷 214406-214406页

作者： Xiuxian Yang Wanxiang Feng Xiaodong Zhou Yuriy Mokrousov Yugui Yao Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement (MOE) Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systems and School of Physics Laboratory of Quantum Functional Materials Design and Application School of Physics and Electronic Engineering Institute of Physics Peter Grünberg Institut and Institute for Advanced Simulation Forschungszentrum Jülich and JARA 52425 Jülich Germany

Mn3Sn has garnered significant attention due to its kagome lattice, 120∘ noncollinear antiferromagnetic order, and substantial anomalous Hall effect. In this study, we comprehensively explore intrinsic and extrinsic contributions to anomalous Hall, anomalous Nernst, and anomalous thermal Hall effects, employing first-principles calculations and group theory analysis. Comparative analysis between our theoretical results and available experimental data underscores the predominance of the intrinsic mechanism in shaping anomalous transport properties at low temperatures. Specifically, Weyl fermions are identified as the primary contributors to intrinsic anomalous Hall conductivity. The significance of extrinsic mechanisms becomes evident at high temperatures, especially when the longitudinal charge conductivity falls into the dirty regime, where the side jump mechanism plays a vital role. Extrinsic contributions to anomalous transport properties are primarily influenced by the electronic states residing at the Fermi surfaces. Furthermore, anomalous transport properties exhibit periodic variations when subjected to spin rotations within the kagome plane, achievable by applying an external magnetic field. Our findings advance the understanding of anomalous transport phenomena in Mn3Sn and offer insights into potential applications of noncollinear antiferromagnetic materials in spintronics and spin caloritronics.

关键词： Anomalous Hall effect Magnetism Transport phenomena First-principles calculations

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Small-Target Infrastructure Detection with Spatial Tracking and Multi-Level Feature Extraction of Railway Track Scenes

Small-Target Infrastructure Detection with Spatial Tracking ...

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2024 International Conference on Intelligent Communication, Sensing and Electromagnetics, ICSE 2024

作者： Du, Heng Cang, Huaiming Bai, Yiwen Wang, Xinyi Beijing Elephant Technology Co. Ltd Beijing China School of Transportation Science and Engineering Beihang University Beijing102206 China State Key Lab of Intelligent Transportation System Beijing100191 China School of Mechanical Engineering Tianjin University of Technology Tianjin Key Laboratory for Advanced Mechanical System Design and Intelligent Control Tianjin China National Demonstration Center for Experimental Mechanical and Electrical Engineering Education Tianjin300384 China

ISBN: (纸本)9798350354935

In the field of railway transportation, with the continuous improvement of train running speed and the continuous increase of operating mileage, it becomes particularly important to ensure the safety and integrity of small-Target infrastructure along the railway train. Although many small-Target detection methods have been proposed, the research on small-Target infrastructure detection along rail trains is very rare. To solve this problem, this paper proposes a small-Target infrastructure detection network with spatial tracking and multi-level feature extraction based on Yolov8n. The experimental results show that ST-YOLO has a 3.6% mAP improvement on the OSDaR23 dataset compared to the baseline Yolov8n, and shows significant advantages over other state-of-The-Art methods. © 2024 IEEE.

关键词： Railroads

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Larger in-plane upper critical field and superconducting diode effect observed in topological superconductor candidate InNbS_(2)nanoribbons

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Nano Research 2024年第7期17卷 6686-6694页

作者： Bo Zheng Changlong Wang Xukun Feng Xiaozhen Sun Shasha Wang Dawei Qiu Xiang Ma Ruimin Li Guanglei Cheng Lan Wang Yalin Lu Peng Li Shengyuan A.Yang Bin Xiang Department of Materials Science and Engineering CAS Key Lab of Materials for Energy ConversionAnhui Laboratory of Advanced Photon Science and TechnologyUniversity of Science and Technology of ChinaHefei 230026China Research Laboratory for Quantum Materials Singapore University of Technology and DesignSingapore 487372Singapore School of Microelectronics University of Science and Technology of ChinaHefei 230052China CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China Lab of Low Dimensional Magnetism and Spintronic Devices School of PhysicsHefei University of TechnologyHefei 230009China Research Laboratory for Quantum Materials IAPMEUniversity of MacaoMacaoChina

Recently,the coexistence of topology and superconductivity has garnered considerable ***,the dimensionality of these materials is crucial for the realization of topological quantum ***,the naturally grown materials,especially with one-dimensional feature that exhibits the coexistence of topology and superconductivity,still face challenges in terms of experimental realization and scalability,which hinders the fundamental research development and the potential to revolutionize quantum ***,we report the first experimental synthesis of quasi-one-dimensional InNbS_(2)nanoribbons that exhibit the coexistence of topological order and superconductivity via a chemical vapor transport ***,the inplane upper critical field of InNbS_(2)nanoribbons exceeds the Pauli paramagnetic limit by more than 2.2 times,which can be attributed to the enhanced spin-orbit coupling and the weakened interlayer interaction between the NbS_(2)layers induced by the insertion of In atoms,making InNbS_(2)exhibit spin-momentum locking similar to that of monolayer NbS_(2).Moreover,for the first time,we report the superconducting diode effect in a quasi-one-dimensional superconductor system without any inherent geometric *** measured maximum efficiency is manifested as 14%,observed atμ0H≈±60 mT,and we propose that the superconducting diode effect can potentially be attributed to the presence of the nontrivial topological *** work provides a platform for studying exotic phenomena in condensed matter physics and potential applications in quantum computing and quantum information processing.

关键词： topological order superconductivity nanoribbon superconducting anisotropy superconducting diode

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