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Polarity Manipulation of Anomalous Hall Effect and Enhanced Spin-Orbit Torques in Perpendicular Synthetic Antiferromagnets

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Physical Review Applied 2023年第2期20卷 024063-024063页

作者： Jingying Zhang Hongwei Xue Ziyang Li Yiwen Song Jiali Zhang Zhiyao Jiang Qingyuan Jin Zongzhi Zhang Shanghai Ultra-Precision Optical Manufacturing Engineering Research Center Key Laboratory of Micro and Nano Photonic Structures (MOE) School of Information Science and Technology Fudan University Shanghai 200433 China

Asymmetric synthetic antiferromagnets (SAFs) with perpendicular magnetic anisotropy (PMA) have attracted considerable attention due to the advantages of both high operation speed and easy detection. In this paper, anomalous Hall effect (AHE) and spin-orbit-torque (SOT) effect are investigated for the SAF samples of [Ni/Co]4/Ru/[Co/Ni]3, which exhibit oscillatory interlayer exchange coupling when varying the Ru layer thickness tRu. It is found that the AHE loop amplitude decreases and even changes its polarity as tRu exceeds 1.27 nm, indicating the existence of a negative Hall coefficient at the Ru/Co interface. The calculated spin Hall angle θSH varies nonmotonically with the increase of tRu, following a similar variation trend to the antiferromagnetic (AF) coupling field HAF. Specifically, when HAF reaches its maximum at tRu = 0.95 nm, θSH is 7 times higher compared to the case of HAF = 0, indicating that the greatly enhanced SOT effect is strongly linked to the AF-coupling interaction. Nevertheless, although HAF increases significantly as the measurement temperature drops from 300 to 10 K, θSH keeps nearly unchanged. Our study demonstrates that the enhanced θSH with AF coupling is primarily determined by the modulation of the spacer-related band structure, rather than a magnetic mechanism of reduced magnon excitations in the magnetic layers. These results of strong AHE and SOT manipulation are valuable for the practical design of SAF-based spintronic devices.

关键词： Anomalous Hall effect Magnetic anisotropy Magnetic coupling RKKY interaction Spin-orbit coupling Spin-orbit torque Synthetic antiferromagnetic multilayers

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Simulation analysis of Cr35Ni45Nb cracking furnace tube welding process based on double ellipsoidal heat source

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International Journal of Wireless and Mobile Computing 2021年第3期21卷 230-242页

作者： Sun, Ying Gao, Zongying Jiang, Guozhang Li, Gongfa Tao, Bo Xiong, Hegen Cao, Yongcheng Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Hubei Wuhan China Institute of Precision Manufacturing Wuhan University of Science and Technology Hubei Wuhan China Biomanipulator and Intelligent Measurement and Control Research Centre Wuhan University of Science and Technology Hubei Wuhan China Institute of 3D Printing and Intelligent Manufacturing Engineering Wuhan University of Science and Technology Hubei Wuhan China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Hubei Wuhan China Hubei Jingmen Wusan Machinery Equipment Manufacturing Co. Ltd. Hubei Jingshan China

The welded joints of Cr35Ni45Nb cracking furnace tubes often crack and fail under the effect of residual welding stress, causing large economic losses. In this paper, a finite element model of a Cr35Ni45Nb cracking furnace tube with an outer diameter of 88 mm and a wall thickness of 7 mm is established, and a double ellipsoidal heat source is used to apply the load. Use Python language to write the life and death unit to carry out the secondary development of ABAQUS to simulate the generation process of solder in the welding process. The laser power is selected as the independent variable, and the sequential coupling method is used to analyse the influence of temperature and residual stress on it during the welding process. The research results show that the higher the laser power, the temperature reached on the weld area will also be higher. The largest axial residual stress appears in the area away from the weld, and the largest circumferential residual stress appears on the outer surface of the weld. Copyright © 2021 Inderscience Enterprises Ltd.

关键词： Chromium alloys

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Lipid-lowering Efficacy of Plant Proteins and Their Application Potential

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science and technology of Food Industry 2025年第2期46卷 412-421页

作者： Wang, Yue Guan, Chunhua Bi, Hong Wu, Fengyating Shen, Yanqin Tao, Liang Tian, Yang College of Food Science and Technology Yunnan Agricultural University Kunming650201 China Engineering Research Center for the Development Utilization of Food and Medicine Homologous Resources Kunming650201 China Yunnan Key Laboratory of Precision Nutrition and Personalized Food Manufacturing Kunming650201 China

In recent years, there has been a gradual increase in the prevalence of obesity, hyperlipidaemia, coronary atherosclerosis, non-alcoholic fatty liver disease, and other conditions attributed to shifts in dietary patterns. These chronic ailments resulting from disruptions in lipid metabolism present a significant risk to human health and longevity. Plant protein serves as a high-quality raw material for food production, offering sustenance for daily functioning along with a range of processing attributes and nutritional benefits. Numerous research studies have demonstrated the pivotal role of plant proteins in modulating lipid metabolism. To consolidate the evidence on the lipid-lowering impacts of dietary plant proteins both in vivo and in vitro, summarizes the effects of amino acid composition of glycine, arginine, leucine and other amino acids in proteins on the lipid-lowering effects, discusses their lipid-lowering mechanisms by several pathways, such as adsorption of bile acid and cholesterol in the gut tract, enhancement/inhibition of rate-limiting enzymes in the processes of cholesterol synthesis, fatty acid oxidation, and the conversion of cholesterol to bile acids, modulation of the pathways related to PPAR signaling, cholesterol absorption and lipid synthesis gene expression, and improves the composition of gut microorganisms and metabolites to explore its lipid-lowering mechanism. Furthermore, it assesses the future trajectory and application possibilities of plant proteins, aiming to offer insights for further research on the regulation of lipid metabolism by plant proteins and to advance their utilization in research and practice. © The Author(s) 2025.

关键词： Cholesterol

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Cutting path-dependent machinability of SiCp/Al composite under multi-step ultra-precision diamond cutting

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Chinese Journal of Aeronautics 2021年第4期34卷 241-252页

作者： Shijin LU Junjie ZHANG Zengqiang LI Jianguo ZHANG Xiaohui WANG Alexander HARTMAIER Jianfeng XU Yongda YAN Tao SUN Center for Precision Engineering Harbin Institute of TechnologyHarbin 150001China State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Mechanical Engineering University of JinanJinan 250022China Interdisciplinary Centre for Advanced Materials Simulation Ruhr-University BochumBochum 44780Germany

Particle-tool interactions,which govern the synergetic deformation of SiC particle reinforced Al matrix composites under mechanical machining,strongly depend on the geometry of particle position residing on cutting *** the present work,we investigate the influence of cutting path on the machinability of a SiCp/Al composite in multi-step ultra-precision diamond cutting by combining finite element simulations with experimental observations and *** consistent with experimentally characterized microstructures,the simulated SiCp/Al composite is considered to be composed of randomly distributed polygonally-shaped SiC particles with a volume fraction of 25 vol%.A multi-step cutting strategy with depths of cut ranging from 2 to 10 lm is adopted to achieve an ultimate depth of cut of 10 *** material parameters and extrinsic cutting conditions utilized in finite element simulations of SiCp/Al cutting are consistent with those used in corresponding *** results reveal different particle-tool interactions and failure modes of SiC particles,as well as their correlations with machining force evolution,residual stress distribution and machined surface topography.A detailed comparison between numerical simulation results and experimental data of multi-step diamond cutting of SiCp/Al composite reveals a substantial impact of the number of cutting steps on particle-tool interactions and machined surface *** findings provide guidelines for achieving high surface finish of SiCp/Al composites by ultra-precision diamond cutting.

关键词： Cutting path Diamond cutting Finite element simulation Particle-tool interaction SiCp/Al composites

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Accelerated proton transport modulates dynamic hydrogen bonding networks in eutectic gel electrolytes for low-temperature aqueous Zn-metal batteries

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Journal of Energy Chemistry 2025年 109卷 325-336页

作者： Baonian Zhu Yuefeng Yan Jingzhe Hong Yuhao Xia Meixiu Song Xiaoshuang Wang Yanan Liu Bo Zhong Dongdong Liu Tao Zhang Xiaoxiao Huang State Key Laboratory of Precision Welding & Joining of Materials and Structures Harbin Institute of Technology Harbin 150001 Heilongjiang China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 Heilongjiang China MIIT Key Laboratory of Advanced Structural–Functional Integration Materials & Green Manufacturing Technology Harbin 150001 Heilongjiang China Key Laboratory of Advanced Technologies of Materials (Ministry of Education) School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 Sichuan China School of Materials Science and Engineering Harbin Institute of Technology (Weihai) Weihai 264200 Shandong China

Aqueous Zn-metal batteries (AZMBs) performance is hampered by freezing water at low temperatures, which hampers their multi-scenario application. Hydrogen bonds (HBs) play a pivotal role in water freezing, and proton transport is indispensable for the establishment of HBs. Here, the accelerated proton transport modulates the dynamic hydrogen bonding network of a Zn (BF 4 ) 2 /EMIMBF 4 impregnated polyacrylamide/poly (vinyl alcohol)/xanthan gum dual network eutectic gel electrolyte (PPX-ILZSE) for low-temperature AZMBs. The PPX-ILZSE forms more HBs, shorter HBs lifetimes, higher tetrahedral entropy, and faster desolvation processes, as demonstrated by experimental and theoretical calculations. This enhanced dynamic proton transport promotes rapid cycling of HBs formation-failure, and for polyaniline cathode (PANI) abundant redox sites of proton, confers excellent low temperature electrochemical performance to the Zn//PANI full cell. Specific capacities for 1000 and 5000 cycles at 1 and 5 A g −1 were 149.8 and 128.4 mA h g −1 at room temperature, respectively. Furthermore, specific capacities of 131.1 mA h g −1 (92.4% capacity retention) and 0.0066% capacity decay per lap were achieved for 3000 and 3500 laps at −30 and 40 °C, respectively, at 0.5 A g −1 . Furthermore, in-situ protective layer of ZnOHF nano-arrays on the Zn anode surface to eliminate dendrite growth and accelerate Zn-ions adsorption and charge transfer.

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Model Predict Control Method with a Cooperative Optimization Algorithm Considering Speed Planning and Energy Management for Fuel Cell Vehicles

SSRN

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SSRN 2024年

作者： Zhang, Lei Liao, Renjie Wei, Xiaodong Huang, Wenyi Key Laboratory of Metallurgical Equipment and Control Technology Ministry of Education Wuhan University of Science and Technology Wuhan430081 China Precision Manufacturing Institute Wuhan University of Science and Technology Wuhan430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of Science and Technology Wuhan430081 China Shenzhen Automotive Research Institute Shenzhen Research Institute of National Engineering Laboratory for Electric Vehicles Shenzhen518057 China

With the development of cutting-edge technologies, vehicle energy optimization is embracing new development opportunities. In this study, a joint optimization strategy for vehicle speed and energy based on the MPC (Model Predictive Control) and CPO (Crested Porcupine Optimizer) methods is proposed for fuel cell vehicles in multi-signal road segments. In the context of Vehicle-to-Infrastructure communication, vehicle speed planning is merged with model predictive control. A multi-objective convex cost function is formulated based on the reference vehicle speed, and the weight coefficients in the cost function are adjusted through the CPO. Subsequently, the optimal vehicle speed trajectory is produced by using MPC. Simultaneously, MPC is also utilized to address energy management issues. When formulating the energy management objective function, the consumption of hydrogen and the loss of fuel cell life are considered to enhance the system’s economic efficiency. CPO is also employed to optimize the weight coefficients in the cost function. Simulation results for the scenario of six traffic lights indicate that the energy management strategy proposed in this study, based on MPC, reduces hydrogen consumption by 5.7% compared to the traditional PMP (Pontryagin’s Minimum Principle) method, and the output power fluctuation of the fuel cell is minor. © 2024, The Authors. All rights reserved.

关键词： Model predictive control

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Mechanistic study on the enhancement of vibration-impact effect by high-concentration carbonyl iron MRF to improve SiCp/Al surface quality

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Journal of manufacturing Processes 2025年 146卷 399-426页

作者： Gu, Yan Zhou, Weidong Lin, Jieqiong Zhou, Xiaoqin Yu, Baojun Gao, Tianyu Liu, Yuanshuo Jilin Provincial Key Laboratory of Micro-Nano and Ultra-Precision Manufacturing School of Mechatronic Engineering Changchun University of Technology Yan'an Ave 2055 Changchun Jilin130012 China Jilin Provincial Key Laboratory of International Science and Technology Cooperation for High Performance Manufacturing and Testing School of Mechatronic Engineering Changchun University of Technology Yan'an Ave 2055 Changchun Jilin130012 China School of Mechanical and Aerospace Engineering Jilin University Changchun130022 China

In this study, to improve the surface quality of SiCp/Al using the vibrational magnetorheological compound polishing method, the mechanism behind the enhanced vibration-impact effect through the use of high-concentration carbonyl iron magnetorheological fluid (HCCI-MRF) was elucidated for the first time. The vibration-impact effect of abrasives on the stability of microstructures in MRF was analyzed to elucidate the mechanism behind the improved surface quality. A shear yield stress model based on triangular microstructures was proposed for HCCI-MRF to characterize its mechanical properties. Rheological tests were performed to validate the accuracy of the proposed yield stress model and to qualitatively analyze the effect of vibration on the dynamic properties of MRF. Furthermore, a material removal rate (MRR) model integrating vibration-impact force and MRF mechanical properties was developed to demonstrate how these factors collectively contribute to the enhanced MRR. When integrated with the polishing experiments on SiCp/Al, the HCCI-MRF transforms the vibration-impact effect into a beneficial factor, preserves the stability of microstructures, and thereby enhances polishing force, MRR, surface quality. Both HCCI-MRF and vibration-impact effect contribute to decreasing the step height of SiCp/Al, while the vibration-impact effect plays a more significant role than the HCCI-MRF. Therefore, elucidating the enhancement mechanism of the vibration-impact effect mediated by HCCI-MRF is critical to understanding the synergistic mechanism governing composite polishing. © 2025 The Society of manufacturing Engineers

关键词： Vibration analysis

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Iterative Control Decoupling Tuning by Feedforward Compensation for precision Motion Stage

Iterative Control Decoupling Tuning by Feedforward Compensat...

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Data Driven Control and Learning Systems (DDCLS)

作者： Hongyang Zhao Li Li Yang Liu Key Laboratory of Ultra-Precision Intelligent Instrumentation Ministry of Industry and Information Technology Harbin Institute of Technology Harbin China State Key Lab of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Wuhan China

In multi-input multi-output (MIMO) ultra-precision motion control system, high-performance decoupling method is the key to reduce the interactions between different degree of freedoms (DOFs). However, the manufacturing and assembling errors will greatly affect the decoupling performance. Some non-negligible factors, such as the center of gravity (CoG) and actuator positions, cannot be accurately determined, which will deteriorate the control accuracy. To tackle this problem, an iterative control decoupling tuning method by feedforward compensation is proposed in this paper. The proposed strategy using feedback signal to tune the parameters of feedforward compensator iteratively and further compensate for the closed-loop dynamics. The simulation results show that the proposed method is more effective, including the convergence accuracy, convergence speed and the improvement of the tracking error caused by the coupling.

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Study on the thinning characteristics of aviation tubes during bending forming under boundary lubrication friction

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Journal of manufacturing Processes 2025年 149卷 443-455页

作者： Yu Wu Zhineng Wang Jing Tian Renzhen Chen Weiming Lin Yaochen Lin Health Maintenance for Mechanical Equipment Key Lab Hunan University of Science and Technology Xiangtan 411201 China Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aviation Propulsion System Shenyang Aerospace University Shenyang 110136 China Zhejiang King-Mazon Intelligent Manufacturing Corp. Ltd Lijiang 321400 China

The reduction of wall thickness during the bending forming process of aviation tubes is a common issue, particularly for large-diameter, thick-walled tubes. Under heavy load conditions, the lubrication state deteriorates, leading to a boundary lubrication state that complicates the prediction of wall thickness reduction. Current research on tube bending forming relies on Coulomb friction, which does not accurately reflect real-world conditions. Therefore, we propose a method for analysing tube thinning during bending forming that considers the friction characteristics of boundary lubrication. ABAQUS/VFRIC was employed to develop a dynamic friction model that considers contact pressure. Additionally, material hardness and RMS roughness were incorporated into the finite element simulation. Results show that as the tubing advances, the contact area between the pressure die and the tube changes and the friction between them generates a certain amount of compressive stress. An increase in contact pressure results in a higher friction coefficient, leading to a substantial rise in the tensile stress on the tube's exterior, further aggravating the thinning of the outer wall. In particular, stress concentrations and elevated strains resulting from boundary lubrication friction are especially pronounced at the 40° and 60° bending positions. In addition, increased RMS roughness and decreased material hardness contribute to more significant thinning effects. Experimental verification indicates that this dynamic friction model offers greater accuracy than the traditional Coulomb friction model in predicting wall thickness thinning, achieving a maximum error reduction to 3% and an accuracy enhancement of 7%. The findings provide theoretical support for process optimisation in aerospace manufacturing and establish a foundation for designing and implementing high-precision forming processes.

关键词： Bending forming Friction model Wall thinning

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The corrosion behavior of Ti-6Al-3Nb-2Zr-1Mo alloy:Effects of HCl concentration and temperature

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Journal of Materials science & technology 2021年第15期74卷 143-154页

作者： Baoxian Su Binbin Wang Liangshun Luo Liang Wang Yanqing Su Fuxin Wang Yanjin Xu Baoshuai Han Haiguang Huang Jingjie Guo Hengzhi Fu National Key Laboratory for Precision Hot Processing of Metals School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin.150001China Department of Materials Application Research AVIC Manufacturing Technology InstituteBeijing100024China School of Materials Science and Engineering.Kunming University of Science and Technology Kunming650093China Yunnan Titanium Industry Co. Ltd.Chuxiong651209China

Investigation about the corrosion behavior of Ti alloys in different ambient environment is of great significance for their practical ***,we systematically investigate the corrosion behavior of a newfound Ti-6 Al-3 Nb-2 Zr-1 Mo(Ti80)alloy in hydrochloric acid(HCl)ranging from 1.37 to 7 M,and temperature ranging from 25 to 55℃,by means of electrochemical measurements,static immersion tests and surface *** manifest that increasing either HCl concentration or temperature can accelerate the corrosion of Ti80 alloy via promoting the breakdown of native protective oxide film and then further facilitating the active dissolution of Ti80 *** to potentiodynamic polarization curves,Ti80 alloy displays a spontaneous passive behavior in 1.37 M HCl at 25℃,compared to a typical active-passive behavior under the other *** indicated by cathodic Tafel slope,the rate determining step for cathodic hydrogen evolution reaction is likely the discharge reaction *** apparent activation energies obtained from corrosion current density and maximum anodic current density for Ti80 alloy in 5 M HCl solution are 62.4 and 55.6 kJ mol-1,respectively,which signifies that the rate determining step in the corrosion process of Ti80 alloy is mainly determined by surface-chemical reaction rather than ***,the electrochemical impedance spectroscopy tests demonstrate that a stable and compact oxide film exists in 1.37 M HCl at 25℃,whereas a porous corrosion product film forms under the other ***,the critical HCl concentration at which Ti80 alloy can maintain passivation at 25℃can be determined as a value between 1.37 and 3 ***,the corroded surface morphology characterization reveals that equiaxedαphase is more susceptible to corrosion compared to intergranularβphase due to a lower content of Nb,Mo,and Zr in the former.

关键词： Titanium alloys Electrochemical techniques Weight loss Corrosion behavior

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