检索结果-内蒙古大学图书馆

Surface-strengthened thermal stable gradient nanostructured CSS-42L fabricated by ultrasonic shot peening and subsequent annealing

引用

Materials Today Communications 2025年 46卷

作者： Song, Chao Wang, Guangchao Zhao, Xinhao Han, Qingyou Yin, Fei Hubei Longzhong Laboratory Hubei Xiangyang441000 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China School of Automotive Engineering Wuhan University of Technology Wuhan430070 China AECC Zhongchuan Transmission Machinery Co. Ltd Changsha410219 China School of Mechanical Engineering Southeast University Jiangsu Nanjing210009 China

Grain refinement from the microscale to the nanoscale significantly enhances the performance of metals. Ensuring stable grain size and mechanical properties at high temperatures is critical for the production and utilization of nanomaterials. In this work, we fabricated average surface ferrite size of 33.9 nm gradient nanostructured CSS-42L using ultrasonic shot peening (USP). To investigate the stability of the nanocrystals at service temperature of 500 °C, the gradient heterogeneous nanostructured samples were annealed at temperatures ranging from 300 to 600 °C for 30 minutes, followed by exposure at 500 °C for one week. The results show that the average surface ferrite size stable at 38.4 nm after annealing at 400 °C, and it stabilized at 36.4 nm after one week of heat preservation, demonstrating the significant stability of the gradient nanostructure. Therefore, the optimal surface strengthening process for CSS-42L is USP-15 min+ AT-400 °C. Fundamental mechanisms of surface nanocrystallization and stable ferrite size are discussed based on both experimental and simulation results. © 2025 Elsevier Ltd

关键词： Nanocrystalline materials

来源：评论

学校读者我要写书评

暂无评论

Catalytic Purification of NOx and PM by Fe-Doped CuCrO2 Catalyst Using Two Kinds of Carriers

引用

Journal of Wuhan University of technology(Materials Science) 2025年第3期 721-727页

作者：陆方舟王伟 WANG Mengxiao School of Automotive Engineering Wuhan University of Technology Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Hubei Research Center for New Energy & Intelligent Connected Vehicle Wuhan University of Technology UNSW School of Mechanical and Manufacturing Engineering Kensington campus UNSW Sydney

Fe-doped CuCrO2catalyst CuCr1-xFexO2series were prepared by the sol-gel method with different Fe *** structure and properties of the catalysts were investigated by XRD（X-ray diffraction）,SEM（scanning electron microscope）,and XPS（X-ray photoelectron spectroscopy） and the purification effect on NOxand PM was measured through simulated emission *** results indicate that CuCrO2catalyst has good catalytic activity,the maximum NOxconversion rate can be up to 28.15%,and the ignition temperature of PM can be reduced to 285 ℃.When the molecular ratio of Cr:Fe=9:1,the catalyst can achieve better catalytic effect,the maximum NOxconversion rate will be up to 30.25% and the PM ignition temperature can be reduced to 280 ℃.In addition,the catalytic activity of catalyst supported on different carriers was also *** results show that catalyst on SiC foam ceramic carrier has better catalytic activity than that on cordierite honeycomb ceramic *** maximum NOxconversion of CuCrO2and CuCr0.9Fe0.1O2can be increased by 0.72% and 1.33% respectively,and the PM ignition temperature can be further reduced by 15 and 5℃ respectively.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Numerical analysis of 3D spot continual induction hardening on curved surface of AISI 1045 steel

引用

Journal of Central South University 2016年第5期23卷 1152-1162页

作者：高恺汪舟秦训鹏朱生霄 Hubei Key Laboratory of Advanced Technology for Automotive Components (Wuhan University of Technology)

In order to investigate and predict the material properties of curved surface AISI 1045 steel component during spot continual induction hardening(SCIH),a 3D model for curved surface workpieces which coupled electromagnetic,temperature and phase transformation fields was built by finite element software ANSYS.A small size inductor and magnetizer were used in this model,which can move along the top surface of workpiece *** effect of inductor moving velocity and workpiece radius on temperature field was analyzed and the heating delay phenomenon was found through comparing the simulated *** temperature field results indicate that the heating delay phenomenon is more obvious under high inductor moving velocity *** trend becomes more obvious if the workpiece radius becomes *** predictions of microstructure and micro-hardness distribution were also carried out via this *** predicted results show that the inductor moving velocity is the dominated factor for the distribution of 100% martensite region and phase transformation *** influencing factor of workpiece radius on 100% martensite region and phase transformation region distribution is obvious under relatively high inductor moving velocity but inconspicuous under relatively low inductor moving velocity.

关键词： spot continual induction hardening curved surface heating delay phenomenon

来源：评论

学校读者我要写书评

暂无评论

Influence of cutter diameter on meshing performance in spiral bevel gears

引用

Journal of Central South University 2016年第1期23卷 102-111页

作者：马志浩韩星会华林熊小双郑方焱 Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology

Playing a critical role in transmitting movement and power, the meshing performance of spiral bevel gears has a significant effect on products' operational performance. To evaluate the meshing performance, the accurate three-dimensional(3D) spiral bevel gear models are established through the Pro/E and MATLAB softwares, and the finite element analysis(FEA) methods are applied to the theoretical investigation of the influence of cutter diameter on meshing performance in spiral bevel gears. The results obtained show that the cutter diameter has a significant influence on spiral bevel gears' meshing performance, such as the contact area, contact pressure, bending stress, torsional stiffness and transmission error.

关键词： spiral bevel gears meshing performance finite element analysis cutter diameter

来源：评论

学校读者我要写书评

暂无评论

Mitigating polarization effects in lithium-ion battery capacitors through conductive network enhancement

引用

Journal of Energy Storage 2025年 127卷

作者： Guo, Zhang Liu, Zhien An, Yabin Lu, Chihua Li, Chen Xu, Yanan Xie, Liping Sun, Xianzhong Zhang, Xiong Wang, Kai Ma, Yanwei Institute of Electrical Engineering Chinese Academy of Sciences Beijing 100190 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528200 China University of Chinese Academy of Sciences Beijing 100049 China Shandong Key Laboratory of Advanced Electromagnetic Conversion Technology Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu Zhongke Jinan 250013 China College of Mechanical Engineering & Automation Fuzhou University Fuzhou 350108 China

Lithium-ion battery capacitor (LIBC), which combines battery material and capacitor material in the cathode, has attracted attention for bridging the gap between high energy density and high power density in energy storage devices, but its application is hindered by polarization phenomena. To address this problem, an enhanced cathode conductive network is established by optimizing the conductive agent content and introducing conductive additives, which can improve the electronic and ionic conductivity. Cathode half-cell with enhanced conductive network, utilizing LiNi_1/3Co_1/3Mn_1/3O₂ and activated carbon as active materials, carbon black (CB) and vapor grown carbon fiber (VGCF) as conductive agents, indicates excellent capacity, rate capability, and cycle performance. And it shows low polarization with the voltage differences between the redox peaks of 91 mV at 0.1 mV s⁻¹ in cyclic voltammetry experiments, nearly 26 % smaller than that for a half-cell with only 5 % CB as the conductive agent. Additionally, the complex polarization dynamics are revealed by distribution of relaxation times technique for extracting time scale information and a mathematical model based on the pseudo-two-dimensions theory. Consequently, a full-cell with a pre-lithiated soft carbon anode is assembled, displaying a great device performance of 300.3 Wh kg⁻¹ and 15.7 kW kg⁻¹. After 7500 cycles at 500 mA g⁻¹, the capacity retention of the device can reach 81.1 % and the energy efficiency is 92.4 %. This study contributes to a better understanding of the polarization phenomenon of LIBCs. © 2025 Elsevier Ltd

关键词： Conductive network Distribution of relaxation times Lithium-ion battery capacitors Mathematical model Polarization phenomenon

来源：评论

学校读者我要写书评

暂无评论

Can ultra-dense cathode agglomerates be treated as solid particles? Direct evidence from single high-nickel NCM particle microelectrode

引用

Energy Storage Materials 2025年 79卷

作者： Zuo, Anhao Wu, Yu Zhou, Wei Lu, Haoran Wu, Oukai Wu, Zhixuan Lv, Zhe He, Feixiong Tan, Tiening Kang, Jianqiang Zhu, Gaolong Feng, Xuning Liu, Xiang Ren, Dongsheng Li, Zhe Ouyang, Minggao School of Vehicle and Mobility Tsinghua University Beijing 100084 China School of Materials Science and Engineering Beijing Institute of Technology Beijing 100081 China Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan430070 China Beijing HyperStrong Technology Co. LTD. Beijing 100094 China Prof. Ouyang Minggao Academician Workstation Sichuan New Energy Vehicle Innovation Center Co. Ltd Yibin644000 China School of Materials Science and Engineering Beihang University Beijing 100191 China

LiNixCoyMn1−x−yO2 (NCM) cathode materials have attracted considerable interest for use in lithium-ion batteries due to their favorable electrochemical properties. NCM cathode materials typically form ultra-dense agglomerates with limited porosity (∼5 %), raising the question of whether these agglomerates can be treated as solid particles in electrochemical evaluations and battery modeling. In this work, we develop and employ a single-particle experimental setup to directly evaluate the kinetics of high-nickel NCM cathode materials at the single-particle scale. We decouple bulk and interfacial transport processes and explore the relationship between electrochemical kinetics and agglomerate structure for LiNi0.8Co0.1Mn0.1O2 and LiNi0.9Co0.08Mn0.02O2 cathode materials. In particular, we present a novel investigation into the effect of primary particle size, which has not been directly explored in previous studies. Our extensive dataset of key kinetic parameters—exchange current density (i0) and diffusion coefficient (DLi)—demonstrates that electrolyte penetration within ultra-dense agglomerates must be considered in physics-based battery models, challenging the assumption that such agglomerates behave as solid particles. These insights, along with the large kinetic dataset, are essential for refining battery models and optimizing battery design. © 2025 Elsevier B.V.

关键词： Lithium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

Influence of Alignment Errors on Contact Pressure during Straight Bevel Gear Meshing Process

引用

Chinese Journal of Mechanical Engineering 2015年第6期28卷 1089-1099页

作者： HAN Xinghui HUA Lin DENG Song LUO Qiuping Hubei Key Laboratory of Advanced Technology for Automotive Components School of Automotive EngineeringWuhan University of Technology

Straight bevel gears are widely applied in automotive, aerospace, chemical and many other fields as one of the most common type of gears. Currently, the researches on straight bevel gears have focused on the fields of fatigue, wear, noise and vibration, while little attention is paid to the effect of multiple alignment errors on the gear tooth wear. To study the influence of alignment errors on the gear tooth wear, a simulated model of a straight bevel gear pair is established. Then, the contact pressure on the tooth surface is analyzed under the various alignment errors according to the Archard wear relationship. The main combinations of alignment errors played vital roles on the tooth wear are investigated. The result shows that under the single alignment error, the contact pressure moves to the tooth heel and increases greatly at here when ？P=0.1 or ？G=0.1; when ？E=–0.03, the contact pressure greatly increases at the tooth heel, but it obviously increases at the tooth toe when ？E=0.03; the alignment error ？γ=1 has little effect on the contact pressure on the tooth surface. Moreover, the combination of ？P, ？G, ？E〈0 and ？γ is the most dangerous type among the multiple alignment errors. This research provides valuable guidelines for predicting the tooth wear under various alignment errors.

关键词： straight bevel gear multiple alignment errors contact pressure wear

来源：评论

学校读者我要写书评

暂无评论

Liquid water transport behavior in gas diffusion layer/microporous layer of proton exchange membrane fuel cells: A pore-scale investigation

引用

Chemical Engineering Journal 2025年 516卷

作者： Ning Zhang Wenshang Chen Haoran Zhou Qihao Deng Ben Chen Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology Wuhan 430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan 430070 China

The cracks on the surface of microporous layer (MPL) were proved to be the main channel for liquid water to enter the gas diffusion layer (GDL) from the catalyst layer (CL). However, the mechanism by which the MPL crack structure parameters affect the liquid water transport behavior within the GDL is not yet clear. Therefore, a three-dimensional (3D) two-phase volume of fluid (VOF) model was developed to investigate the influence of MPL crack structure parameters on liquid water transport in the GDL. The results show that MPL can effectively reduce the liquid water saturation of GDL and increase the capillary pressure of liquid water entering GDL. The liquid water enters GDL mainly through the intersection of cracks on the surface of MPL. Increasing the MPL thickness and reducing the crack width can effectively reduce the liquid water saturation, but the most effective method is to increase the contact angle. This study elucidates the liquid water transport mechanism across the MPL/GDL and provides theoretical guidance for optimizing MPL design.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Corrigendum to “Research on Plastic Deformation and Machinability of Zone-Melted N-Type Bismuth Telluride Thermoelectric Materials” [Scripta Materialia 261 (2025) 116630]

引用

Scripta Materialia 2025年

作者： Chen Ji Quansheng Chen Zhili Hu Wenyu Zhao Lin Hua School of Automotive Engineering Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Hubei Key Laboratory of Advanced Technology for Automobile Components Wuhan University of Technology Wuhan 430070 China Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology Wuhan 430070 China

来源：评论

学校读者我要写书评

暂无评论

Unveiling strength-plasticity synergic mechanism of AZ91 alloy during multi-DOF forming

引用

Journal of Materials Science & technology 2024年第28期195卷 80-92页

作者： Fang Chai Xinghui Han Zhiyuan Ma Lin Hua Xuan Hu Wuhao Zhuang Fangyan Zheng Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hubei Longzhong Laboratory Xiangyang 441000China

High performance is of great importance to expand the application of magnesium alloys,and the inherent strength-plasticity synergic mechanism during a specific process should be *** this paper,a multi-degrees of freedom(multi-DOF)forming process is conducted on initially extruded AZ91 magnesium alloy at different deformation degrees,including small deformation with deformation amounts of 10%and 20%,medium deformation with deformation amounts of 30%and 40%,and large deformation with deformation amounts of 60%and 70%.Simultaneous enhancement of ultimate tensile strength(UTS)and plasticity is achieved in all these multi-DOF processed alloys in comparison to the initially extruded *** deformation degrees increase,both UTS and elongation of the multi-DOF processed alloy gradually increase in small and medium deformation and then slightly decrease in large deforma-tion,exhibiting a superior strength(401 MPa)and plasticity(16.3%)combination at deformation amount of 40%.The evolution of mechanical properties varying with deformation degrees is closely dependent on microstructure and texture *** microstructures of multi-DOF processed AZ91 alloy are increasingly refined and heterogeneous as deformation degrees gradually increase,which consist of the predominant equiaxed coarse grains(CGs)and a few fine grains(FGs)in small deformation,some CGs(equiaxed or slightly elongated)and some FGs in medium deformation,and some remarkably elongated CGs and the predominant FGs in large *** area fraction of basal texture gradually decreases while that of prismatic texture gradually increases with increasing deformation degrees,finally resulting in a complete disappearance of basal texture at a deformation amount of 70%.Thus,the strength-plasticity synergic mechanism related to increasingly obvious heterogeneous structure,gradually refined microstructure,and gradually decreased basal texture contribute to the constantly simultaneous improvement of UTS

关键词： AZ91 magnesium alloy Multi-degrees of freedom forming Strength-plasticity synergic mechanism Microstructure Texture

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：