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Pitting corrosion initiated by SiO_(2)-MnO-Cr_(2)O_(3)-Al_(2)O_(3)-based inclusions in a 304 stainless steel

Journal of Iron and Steel research International 2024年第9期31卷 2281-2293页

作者： Jin-zhen Hu Shi Li Ji Zhang Ying ren Li-feng Zhang School of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China School of Mechanical Engineering Yanshan UniversityQinhuangdao066004HebeiChina Stainless Steel R&D Center of Central R&D Institute Baoshan Iron and Steel Co.Ltd.Shanghai201900China School of Mechanical and Materials Engineering North China University of TechnologyBeijing100144China

The influence of the aluminum content on the pitting corrosion of a 304 stainless steel by a Cl−solution was *** number,area,and composition of non-metallic inclusions were modified by the addition of aluminum in the steel,which was responsible for the variation of the corrosion degree of the 304 stainless *** detection,corrosion test,electrochemical test,thermodynamic calculation,and first-principles calculation were performed to evaluate the pitting corrosion of the stainless *** initiation of the pitting corrosion by three types of inclusions,including(Mn,Si,Cr,S)O,(Mn,Al,Cr)O,and Al_(2)O_(3)were in-situ *** corroding for 880 min,the corrosion index of(Mn,Si,Cr,S)O,(Mn,Al,Cr)O,and Al_(2)O_(3)was 0.38%,0.02%,and 0.00%min−1,*** the increase in aluminum content in the steel,the pitting potential of the stainless steel was 0.131,0.304,and 0.338 V,respectively,indicating that a higher aluminum content in the steel was beneficial to improving the pitting corrosion resistance of the 304 stainless steel.

关键词： Pitting corrosion 304 stainless steel Non-metallic inclusion First-principles calculation Galvanic corrosion

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Magnetic properties and microstructures of multi-component Sm-Co-based films prepared by high-throughput experiments

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稀有金属（英文版） 2025年第2期44卷 1284-1293页

作者： Xin-rui Zheng Si-Zhe Liang Zhao-Guo Qiu Yan-Song Gong Hong-Xia Meng Gang Wang Zhi-Gang Zheng Wei-Xing Xia de-Chang Zeng Ping Liu School of Materials Science and Engineering South China University of TechnologyGuangzhou 510640China Zhongshan R&D Center for Materials Surface and Thin Films Technology of the South China University of Technology Gent Materials Surface Technology(Guangdong)Co.Ltd.Zhongshan 528437China Laboratory of Rare-Earth Magnetic Functional Materials Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China Department of Physics University of Texas at ArlingtonArlington TX76019USA

Sm-Co-based films play an irreplaceable role in special applications due to their high curie temperature and magnetocrystalline anisotropic energy,especially in heat-assisted magnetic recording(HAMr),but the complex composition of Sm-Co phase and unclear synergistic coupling mechanisms of multi-elemental doping become the challenges to enhance the *** this work,a novel strategy combining magnetron sputtering and a high-throughput experiment method is applied to solve the above-mentioned ***/Cu co-doping highly increases the remanence while maintaining a coercivity larger than 26 kOe,leading to an enhancement of the magnetic energy product to 18.1 MGOe.X-ray diffraction(Xrd)and high-resolution transmission electron micro-scope(HrTEM)reveals that SmCo5 phase occupies the major fraction,with Co atoms partially substituted by Fe and Cu *** situ Lorentz transmission electron microscopy(LTEM)observations show that the Sm(Co,Cu)5 phase effectively prohibits domain wall motions,leading to an increase of coercivity(Hc).Fe doping increases the low saturation magnetization(Ms)and low remanence(Mr)due to the Fe atom having a higher satu-ration magnetic *** magnetization reversal behaviors are further verified by micromagnetic *** results suggest that Sm-Co-based films prepared via Fe/Cu co-doping could be a promising candidate for high-performed HAMr in the future.

关键词： Magnetron sputtering High-throughput experiments Sm-Co Fe/Cu co-doping Magnetic properties Magnetic domain

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Viewing Angle Control through Electrically-Induced Effective Out-of-Plane retardation differences in Automotive displays

Viewing Angle Control through Electrically-Induced Effective...

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International Symposium, Seminar, and Exhibition, display Week 2024

作者： Choi, Tae-Hoon Wook Lee, Hyun Uk Ha, Jin Department of Advanced Materials R&D Korea Automotive Technology Institute Cheonan31214 Korea Republic of

We report a method for controlling the viewing angle using twisted nematic liquid crystal (TN-LC) materials for automotive display applications. We achieved switching between normal and privacy modes with the change in viewing-angle-dependent retardation through the reorientation of the TN-LC molecules under crossed polarizers by applying a vertical electric field. © 2024, John Wiley and Sons Inc. All rights reserved.

关键词： Nematic liquid crystals

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Unidirectional Viewing Angle Control Using Liquid Crystal Film on the Automotive displays

Unidirectional Viewing Angle Control Using Liquid Crystal Fi...

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2024 Conference on Lasers and Electro-Optics/Pacific rim, CLEO-Pr 2024

作者： Choi, Tae-Hoon Lee, Hyun Wook Ha, Jin Uk Department of Advanced Materials R&D Korea Automotive Technology Institute Cheonan31214 Korea Republic of

We report a method for controlling unidirectional viewing angle in automotive displays using a liquid crystal (LC) film. By electrically controlling the refractive index distribution of the LC film, the light is emitted toward the left side, which indicates that the display panel can be effectively controlled in the direction of the driver between transmission and blocking. © 2024 The Author(s)

关键词： Liquid crystal displays

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Evolution of Nuvoton Microcontroller-based Education Board

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recent Patents on Engineering 2024年第9期18卷 127-139页

作者： Elp, Hudaverdi Emin Inan, remzi Assan EMS Technologies R&D Research and Development Istanbul Umraniye Turkey Department of Electric and Electronics Engineering Faculty of Technology Isparta University of Applied Sciences Isparta Turkey

Background: The novel coronavirus pandemic has not only affected people's health. The pandemic has also affected their social life and work. For all the reasons mentioned, international trade has suffered and is still in the process of recovery. Objective: Especially in the semiconductor industry, many manufacturers postponed their deliveries to future periods and this triggered the chip crisis. Many hightech industries, including the automotive industry, were deeply affected by the consequences of the crisis, with factories halting or slowing down production. despite the shortage of chip stocks, Nuvoton has a large amount of Microcontroller Units (MCUs), but due to the shortage of resources, education and libraries, software developers have not been able to integrate their products in a limited time. Methods: In this paper, the Nuvoton Education Board has presented 20 common examples for embedded software developers and beginners. results: The PCB is designed considering all modules connected to separate General Purpose Input Output (GPIO) pins to make multiple module examples without changing the peripherals and pin configuration of the MCU. Clock configuration has been simplified and unnecessary details have been meticulously removed to make the examples easily understandable. Nuvoton NuMaker M263KI V1.3 was added on the designed PCB. Conclusion: The PCB contains almost all the necessary electronics to learn embedded software and use Nuvoton MCUs in industrial projects. The board is supported with user interfaces and printed documentation. The codes are explained with command lines to teach users even small details. A patent application has been filed for the proposed education board. © 2024 Bentham Science Publishers.

关键词： Embedded systems

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Investigation on the temperature-dependent diffusion growth of intermetallic compounds in the Mg-Al-Zn system:Experiment and modeling

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Journal of Magnesium and Alloys 2024年第8期12卷 3394-3408页

作者： Kaiming Cheng Yan Zheng Jiaxing Sun Yafei Zhao Jin Wang Huan Yu dongqing Zhao Hang Li Jixue Zhou Zhenyu Ma Junmin Wang Cuiping Guo Xitao Wang Lijun Zhang Yong du Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials Advanced Materials InstituteQilu University of Technology(Shandong Academy of Sciences)Jinan250014China Laboratory of Materials Phase Equilibria and New Materials Design School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Technology R&D Center Shandong Qiangang Metal Technology Co.LtdJining272000China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083China

With the rapid development of Mg alloys,deeper understanding to the thermodynamic and diffusional kinetic behavior of intermetallic compounds(IMCs)is important for studying the effect of alloying elements to the microstructure ***,a systematic quantitative investigation on the diffusional growth of IMCs is of great ***,the works studying the elemental diffusion behaviors of multiple-element IMCs are rare in magnesium alloy *** current work takes the ternary Mg-Al-Zn system as research target,and combines the diffusion couple technique,phase stability diagrams,in-situ observation technique and numerical inverse method to investigate the temperature-dependent kinetic *** parabolic growth constant(PGC)and interdiffusion coefficients for Mg solid-solution phase andγ-Mg_(17)Al_(12),β-Mg_(2)Al_(3),ε-Mg_(23)Al_(30),MgZn_(2),Mg_(2)Zn_(3),τ-Mg_(32)(Zn,Al)49 andφ-Mg_(5)Zn_(2)Al_(2) IMCs in the Mg-Al-Zn alloy system are *** comparing the current experimental with calculation results,the rate-controlling factor of the temperature-dependent diffusion growth ofφ,τandεternary IMCs in the Mg-Al-Zn system is further discussed in detail.

关键词： diffusion couple Phase stability diagram Numerical inverse method(NIM) Interface migration High-temperature laser-scanning confocal microscopy(HTLSCM)

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research on the recognition and Characterization of Fractures in Coal rock Based on CT Scanning

Research on the Recognition and Characterization of Fracture...

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International Petroleum and Petrochemical technology Conference 2024, IPPTC 2024

作者： Ye, Zhilin Qu, Shiyuan Liu, Jianquan Gao, Xiang Jin, Yi CNPC Engineering Technology R&D Company Limited China Research Institute of Petroleum Exploration and Development China

Coal rock fractures play a vital role as key channels for gas migration and storage in the exploration and development of coalbed methane. The characteristics of these fractures, such as porosity distribution, specific surface area, and connectivity, directly impact the adsorption, diffusion, and permeability behaviors of coal reservoirs. Therefore, a detailed analysis of coal rock fracture characteristics is vital in assessing the extractability of coalbed methane and during its exploration and development process. Currently, techniques like imaging logging, seismic detection, and micro-CT are employed for characterizing and studying fractures at various scales. Among these, high-resolution non-destructive CT scanning technology, by constructing three-dimensional data models of core samples, enables a quantitative analysis of fracture distribution features and size parameters. Traditional digital image processing methods, such as threshold segmentation and binary segmentation, though advantageous in computational speed, have limitations in the accuracy of fracture identification. With the advancement of artificial intelligence technology, deep learning-based image processing techniques have increasingly become significant tools for fracture detection due to their powerful feature extraction capabilities. This study conducted micrometer-level CT scanning experiments on coal rock samples, using CT image processing technology to construct a digitalized coal rock core model. deep learning methods were applied for precise fracture identification, establishing an appropriate deep learning architecture and optimized parameters for coal rock fracture recognition. Furthermore, this paper provides a detailed quantitative characterization of the precisely identified fractures, offering robust technical support for the exploration and development of coalbed methane. The high-resolution nondestructive CT scanning technology and three-dimensional fracture network reconstruction

关键词： Computerized tomography

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development of a personal mobility scooter with autonomous driving and safety features

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Journal of Institute of Control, robotics and Systems 2023年第5期29卷 404-411页

作者： Eui-Jung, Jung Kwang-Woo, Jeon Juhyun, Kim Jong-Il, Lee Min-Gyu, Kim Hyo-Jeong, Cha Human-Robot Interaction R&D Center Korea Institute of Robotics & Technology Convergence Korea Republic of AI Robotics R&D Division Korea Institute of Robotics & Technology Convergence Korea Republic of Department of Medical Robotics Korea Institute of Machinery & Materials Korea Republic of

This study developed a personal mobility scooter with autonomous driving and safety functions. The scooter can recognize indoor and outdoor environmental conditions by applying various sensor systems similar to semi-autonomous vehicles. The addition of an autonomous driving function ensures user convenience. The mobility scooter was developed to provide user safety by preventing collisions and rollover accidents. First, the system configuration and functions of the personal mobility scooter have been introduced, followed by the application of algorithms to implement each function. In terms of convenience, the main features of personal mobility scooters include indoor autonomous driving, outdoor semi-autonomous driving, and guardian-following driving. In terms of safety, the salient features are collision prevention and rollover prevention. The functions proposed here were incorporated in an actual mobility scooter, and its efficacy was verified through experiments. © 2023, Institute of Control, robotics and Systems. All rights reserved.

关键词： Motion planning

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role of solute elements in Mg-Mg_(2)Ni hydrogen storage alloys:A first-principles calculation study

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Journal of Magnesium and Alloys 2024年第11期12卷 4574-4593页

作者： Min-Seok Yoon Jae Hur Seo-Hui Park Ui-Jong Lee Guanglong Xu Hyung-Ki Park Byeong-Chan Suh Young Min Kim Won-Seok Ko Department of Materials Science and Engineering Inha UniversityIncheon 22212Republic of Korea College of Materials Science and Engineering Nanjing Tech UniversityNanjing 211816China Functional Materials and Components R&D Group Korea Institute of Industrial TechnologyGangneung 25440Republic of Korea Advanced Metals Division Korea Institute of Materials ScienceChangwon 51508Republic of Korea Advanced Materials Engineering University of Science and TechnologyDaejeon 34113Republic of Korea

The effects of various alloying elements on the performance of Mg-Mg_(2)Ni hydrogen storage alloys were investigated by performing firstprinciples density functional theory *** examined the important characteristics of hydrogen storage alloys by considering both Mg-based solid solution and Mg_(2)Ni-based intermetallic compound phases,where the hydride forms are Mg H2and Mg_(2)NiH4,*** particular,qualitatively valid information for predicting changes in plateau pressures in the pressure-composition-temperature(PCT)curve was provided by calculating changes in the energy of related hydrogenation *** effects of alloying elements on volume changes due to hydrogenation reactions were also obtained to provide additional criteria for the practical use of hydrogen storage *** the Mg_(2)Ni-based intermetallic compound,we examined the site preference of each alloying element,considering the designated stoichiometry of the base *** on the revealed site preferences,the effects of various possible alloying elements on the properties of Mg_(2)Ni-based hydrides were also *** structure analyses were further conducted to elucidate the detailed mechanisms underlying the role of the additional solute elements.

关键词： Mg-Mg_(2)Ni alloys density functional theory Hydrogen storage alloys Metal hydrides

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Novel Temporary Bonding/debonding System Enabling Advanced Packaging Process 22

Novel Temporary Bonding/Debonding System Enabling Advanced P...

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22nd International Conference on Electronics Packaging, ICEP 2023

作者： Miyazawa, Emi Enomoto, Tetsuya Akasu, Yuta Sobue, Shogo Nakamura, Yuki Ogawa, Saeko Kawamori, Takashi Institute for Advanced Integrated Technology Resonac Corporation Packaging Materials Group High Performance Materials Department Electronics R&D Center Electronics Business Headquarters Resonac Corporation Film R&D Group Packaging Materials R&D Department Institute for Advanced Integrated Technology Resonac Corporation Bonding Materials Group High Performance Materials Department

ISBN: (纸本)9784991191152

Novel temporary bonding/debonding system including high heat resistant temporary bonding adhesive and debonding methods with newly developed photonic release by Xe flash light irradiation will be introduced. New temporary bonding adhesive is endurable up to 300 °C and can be easily removed by peeling off after debonding from the support carrier. By adopting the dual layer structure with adhesive layer and metal layer on glass carrier, one-shot Xe flash light irradiation within 5 ms enables debonding cleanly, indicating the increased throughput at debonding step. Process demonstration results of wafer thinning down to 50 μm, fan-out wafer level packaging (FOWLP) will also be shown. © 2023 Japan Institute of Electronics Packaging.

关键词： debonding

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