检索结果-内蒙古大学图书馆

Effect of Zr-deoxidation on microstructure and mechanical behavior of microalloyed heavy plates with low impurity content

引用

Journal of Iron and Steel Research International 2021年第2期28卷 190-200页

作者： Cheng-yang Hu Hang-yu Dong Kai-ming Wu R.D.K.Misra Lei Zhong Xing Jin Qiang Li Laboratory for Excellence in Advanced Steel Research Materials Science and Engineering ProgramDepartment of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl Paso 79968TXUSA The State Key Laboratory of Refractories and Metallurgy International Research Institute for Steel TechnologyCollaborative Innovation Center for Advanced SteelsWuhan University of Science and TechnologyWuhan 430081HubeiChina Research Institute of Nanjing Iron and Steel Co. Ltd.Nanjing 210035JiangsuChina

The significance of different deoxidation practises on the ductility and impact toughness of next generation of microalloyed heavy plates was elucidated to explore the best deoxidation practice in obtaining required mechanical properties,which was judged by the combined effects of composition,size and number density of inclusions on the ductility of the experimental high-strength low alloy *** impurity contents,i.e.,total O+N+S contents,of 82×10^(-6)(Al-killed)and 118×10^(-6)(Zr-killed)have been induced to characterize both the *** was characterized using tensile and Charpy V-notch *** number,size and composition of the inclusions were characterized using a field emission scanning electron microscope with an energy dispersive *** the Al-killed steel,the inclusion structure consisted of titanium nitrides,stringer calcium aluminates and elongated manganese sulfides,whereas in the Zr-killed steel,the inclusion structure consisted of mainly fine spherical oxide inclusions with sulphide *** impurity content did not have a significant effect on the number density of inclusions,as with higher and lower impurity content,the number of inclusions was 83.7 and 78.8 mm^(-2),***,the size distribution of the inclusions,especially the coarse inclusions with their longest length greater than 8μm,differsmuch from each *** number density of coarse inclusions differs from 0.8 to 1.1 mm^(-2) with processing,and in Al-killed steel,55.5% of the coarse inclusions were titanium nitrides or manganese sulfides,whereas in Zr-killed steel,only 22.5% of the coarse inclusions were titanium nitrides and manganese *** titanium nitrides were especially detrimental to the impact *** number density of them should be below 0.33 mm-2 in order to guarantee the best possible toughness in the steel in *** average crystallographic grain size detected by electron backscattered diffraction of Zr-killed steel(4

关键词： Microalloyed heavy plate Zr-killed technology Inclusion modification Mechanical property

来源：评论

学校读者我要写书评

暂无评论

Versatile SrFeO_(x) for memristive neurons and synapses

引用

Journal of Materiomics 2022年第5期8卷 967-975页

作者： Kaihui Chen Zhen Fan Jingjing Rao Wenjie Li Deming Wang Changjian Li Gaokuo Zhong Ruiqiang Tao Guo Tian Minghui Qin Min Zeng Xubing Lu Guofu Zhou Xingsen Gao Jun-Ming Liu Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&National Center for International Research on Green Optoelectronics South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China School of Physics and Telecommunication Engineering South China Normal UniversityGuangzhou510006China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen518055China Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures Nanjing UniversityNanjing210093China

Spiking neural network(SNN)consisting of memristor-based artificial neurons and synapses has emerged as a compact and energy-efficient hardware solution for spatiotemporal information ***,it is challenging to develop memristive neurons and synapses based on the same material system because the required resistive switching(RS)characteristics are ***,it is shown that SrFeO_(x)(SFO),an intriguing material system exhibiting topotactic phase transformation between insulating brownmillerite(BM)SrFeO_(2).5 phase and conductive perovskite(PV)SrFeO_(3) phase,can be engineered into both neuronal and synaptic *** a BM-SFO single layer as the RS medium,the Au/BM-SFO/SrRuO_(3)(SRO)memristor exhibits nonvolatile RS behavior originating from the formation/rupture of PV-SFO filaments in the BM-SFO *** contrast,using a PV-SFO(matrix)/BM-SFO(interfacial layer)bilayer as the RS medium,the Au/PV-SFO/BM-SFO/SRO memristor exhibits volatile RS behavior originating from the interfacial BM-PV phase *** and neuronal characteristics are further demonstrated in the Au/BM-SFO/SRO and Au/PV-SFO/BM-SFO/SRO memristors,*** the SFO-based synapses and neurons,fully memristive SNNs are constructed by simulation,which show good performance on unsupervised image *** study suggests that SFO is a versatile material platform on which both neuronal and synaptic devices can be developed for constructing fully memristive SNNs.

关键词： Memristors Artificial synapses Artificial neurons Spiking neural network SrFeO_(x)

来源：评论

学校读者我要写书评

暂无评论

Wastewater surveillance and an automated robot:effectively tracking SARS-CoV-2 transmission in the post-epidemic era

引用

National science Review 2023年第6期10卷 86-95页

作者： Guanyong Ou Yuxuan Tang Shiyu Niu Liwen Wu Shaxi Li Yang Yang Jun Wang Yun Peng Chuanfu Huang Wei Hu Qinghua Hu Yinghui Li Yang Ping Chao Lin Boping Yu Qi Han Yabin Hao Zhiguang Luo Wende Tian Han Zhang Yingxia Liu National Clinical Research Center for Infectious Disease State Key Discipline of Infectious Disease The Third People's Hospital of Shenzhen Second Hospital Affiliated to Southern University of Science and Technology School of Medicine Southern University of Science and Technology International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale Optoelectronics College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen Longhua Drainage Co. Ltd. Shenzhen Center for Disease Control and Prevention Microbiology Laboratory Shenzhen Center for Disease Control and Prevention Power China Eco-Environmental Group Co. Ltd. Shenzhen Water Planning & Design Institute Co. Ltd. Shenzhen Academy of Environmental Sciences School of Civil and Environmental Engineering Harbin Institute of Technology (Shenzhen) 1Institute of Solid Wastes and Physical Environment Research Shenzhen Academy of Environmental Sciences Shenzhen Metasensing Technology Co. Ltd. Zhongmin (Shenzhen) intelligent ecology Co. Ltd. Research Centre for Eco-Environmental Sciences Chinese Academy of Sciences

Wastewater-based epidemiology(WBE) has exhibited great utility in the early and rapid identification of SARS-C ***,the efficacy of wastewater surveillance under China' s previous strict epidemic prevention policy remains to be *** collected the WBE data of wastewater treatment plants(WWTPs) in the Third People's Hospital of Shenzhen and several communities to determine the significant effectiveness of routine wastewater surveillance in monitoring the local spread of SARS-C oV-2under tight containment of the *** results of 1 month of continuous wastewater surveillance showed that positive signals for SARS-C oV-2 RNA were detected in the wastewater samples,and a significant positive correlation was observed between the virus concentration and the number of daily *** addition,the community' s domestic wastewater surveillance results were confirmed even 3 days before,or simultaneously with,the infected patient being confirmed as having the ***,an automated sewage virus detection robot,ShenNong No.l robot,was developed,showing a high degree of agreement with experimental data,offering the possibility of large-scale multi-point ***,our results illustrated the clear indicative role of wastewater surveillance in combating COVID-19 and provided a practical basis for rapidly expanding the feasibility and value of routine wastewater surveillance for future emerging infectious diseases.

关键词： SARS-CoV-2 wastewater surveillance wastewater-based epidemiology WWTP automated robot

来源：评论

学校读者我要写书评

暂无评论

Reinforcement of Microwave Absorption and Thermal Conductivity of Polydimethylsiloxane Achieved by Metal-Organic Framework-Derived Carbon Nanotube/Boron Nitride Flake Heterogeneous Structure

SSRN

引用

SSRN 2024年

作者： Lin, Yibing Zhong, Bo Chen, Jing Zhang, Beiyi Yu, Yuanlie Key Laboratory of Science and Technology on Wear and Protection of Materials China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai264000 China School of Materials Science and Engineering Harbin Institute of Technology at Weihai Weihai264209 China

Due to the swift advancement of electronic devices towards miniaturization, high-integration, multi-functionality, high-power, and high-frequency, it is necessary to design thermal interface materials (TIMs) that possess exceptional thermal conductivity as well as capabilities for absorbing electromagnetic waves. In this report, carbon nanotubes (CNTs) containing metal cobalt (Co) nanoparticles have been in-situ grown on the surfaces of boron nitride flakes (BNFs) using the Co nanoparticles as catalysts which formed by the high-temperature pyrolysis and reduction of zeolite-imidazolate skeleton. Then, a multifunctional heterogeneous structure of Co@CNT/BNFs has been developed with tunable microwave absorption (MA) property and high thermal conductivity, which can be applied to enhance the MA performance and thermal conductivity of polymers simultaneously. The minimum reflection loss can reach -46.6 dB and a broad absorption bandwidth of 5.92 GHz can be obtained when adjusting the content of Co@CNT/BNFs in the absorber. Furthermore, the thermal conductivity of the polydimethylsiloxane measured using the transient hot-wire apparatus is 0.72 W/(m·K) when the content of Co@CNT/BNFs is 30 wt.%, exhibiting excellent heat dissipation performance in thermal management. This work is significant for investigating MA packaging and high thermally conductive TIMs for the electronic devices. © 2024, The Authors. All rights reserved.

关键词： Carbon nanotubes

来源：评论

学校读者我要写书评

暂无评论

Investigation of Mechanical Properties and High Temperature Wear Resistance of Cofeni1.5vzr0.4six High Entropy Alloys Optimized by Si Alloying

SSRN

引用

SSRN 2024年

作者： Jiang, Junjie Xin, Benbin Zhang, Aijun Han, Jiesheng Meng, Junhu State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

The current work studies the mechanical properties and high-temperature wear resistance of CoFeNi1.5VZr0.4Six high entropy alloys by Si alloying. The Si alloying transforms Ni7Zr2 into a more wear-resistant silicide phase, and the microstructure changes from lamellar eutectic structure to dendritic structure. The high temperature microhardness, compressive strength and fracture toughness of the HEAs increase first and then decrease with the increasing Si content. The Si alloying in HEAs brings about significant improvements in wear resistance at elevated temperature through the combined effects of phase structure modifications and compositional changes in the tribo-layer. The augmented mechanical properties of the worn subsurface layer contribute to improved wear resistance at elevated temperatures © 2024, The Authors. All rights reserved.

关键词： Wear resistance

来源：评论

学校读者我要写书评

暂无评论

Improved Tribological Properties of W-S-C-N Film Contributed by the Friction-Induced Well Crystallized Thick Transfer Layer

SSRN

引用

SSRN 2024年

作者： Wang, Desheng Li, Zhaowang Guo, Longbang Ye, Qinlin He, Jun Liu, Zhilu Jiang, Dong Fu, Yanlong Gao, Xiaoming Sun, Jiayi Weng, Lijun Hu, Ming State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

Amorphous W-S-C-N lubricating film was were prepared by sputtering two WS2 targets and an additional WC target in Ar&N2 atmosphere. The W-S-C-N film showed a very low stable COF of about 0.01 and wear rate during long sliding cycles, exhibiting superior tribological property compared to the deposited WS2, W-S-C and W-S-N films. Friction-induced well crystallized WS2 transfer film with (002) basal plane parallel to the sliding surface formed on the counterpart contributed to the low friction of the W-S-C-N film while the embedded WC nanocrystals and other amorphous phase enhanced the durability of the transfer film to reach a low wear rate. © 2024, The Authors. All rights reserved.

关键词： Tribology

来源：评论

学校读者我要写书评

暂无评论

Atomic-vibration-induced nonlinear electronic polarization for terahertz detection

引用

Physical Review B 2025年第8期111卷 085201-085201页

作者： Zhi Li Hussain Irshad Yu Gu Miriding Mutailipu Toshiaki Iitaka Haibin Su Xiangang Wan School of Material Science and Engineering Nanjing University of Science and Technology Nanjing 210094 China Research Center for Crystal Materials Xinjiang Technical Institute of Physics and Chemistry Chinese Academy of Sciences Urumqi 830011 China Discrete Event Simulation Research Team RIKEN Center for Computational Science 2-1 Hirosawa Wako Saitama 351-0198 Japan Department of Chemistry The Hong Kong University of Science and Technology Hong Kong China National Laboratory of Solid State Microstructures and School of Physics Nanjing University Nanjing China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing China

Terahertz (THz) has broad applications for imaging, spectroscopy, and high-data-rate communication. However, THz detection at room temperature remains a significant challenge. By model Hamiltonian including electron-phonon coupling and photon-electron interaction within dipole approximation, we demonstrate that atomic displacement A⃗(t) driven by THz field E⃗(t) can induce static nonlinear electronic polarization in semiconductors without spatial inversion symmetry by nonlinear optic effect (αijkEjEk), Raman effect (βijkAjEk), and nonlinear phononic effect (γijkAjAk). Our numerical calculations also reveals that nonlinear phononic effect dominates the change of static polarization in ferroelectric semiconductor BaTiO3 irradiated by THz field. This work presents a design principle for efficient THz detection at room temperature by monitoring the change of surface polarization induced by THz-driven lattice vibration.

关键词： Lattice vibrations

来源：评论

学校读者我要写书评

暂无评论

Multi-objective parametrization of interatomic potentials for large deformation pathways and fracture of two-dimensional materials

引用

npj Computational materials 2021年第1期7卷 1042-1052页

作者： Xu Zhang Hoang Nguyen Jeffrey T.Paci Subramanian K.R.S.Sankaranarayanan Jose L.Mendoza-Cortes Horacio D.Espinosa Theoretical and Applied Mechanics Program Northwestern UniversityEvanstonILUSA Department of Chemistry University of VictoriaVictoriaBCCanada Center for Nanoscale Materials Argonne National LaboratoryLemontILUSA Department of Chemical Engineering&Materials Science Michigan State UniversityEast LansingMIUSA Department of Mechanical Engineering Northwestern UniversityEvanstonILUSA

This investigation presents a generally applicable framework for parameterizing interatomic potentials to accurately capture large deformation *** incorporates a multi-objective genetic algorithm,training and screening property sets,and correlation and principal component *** framework enables iterative definition of properties in the training and screening sets,guided by correlation relationships between properties,aiming to achieve optimal parametrizations for properties of ***,the performance of increasingly complex potentials,Buckingham,Stillinger-Weber,Tersoff,and modified reactive empirical bond-order potentials are *** MoSe_(2)as a case study,we demonstrate good reproducibility of training/screening properties and superior *** MoSe_(2),the best performance is achieved using the Tersoff potential,which is ascribed to its apparent higher flexibility embedded in its functional *** results should facilitate the selection and parametrization of interatomic potentials for exploring mechanical and phononic properties of a large library of two-dimensional and bulk materials.

关键词： materials apparent enable

来源：评论

学校读者我要写书评

暂无评论

Synthesized complex‑frequency excitation for ultrasensitive molecular sensing

引用

eLight 2024年第1期4卷 283-292页

作者： Kebo Zeng Chenchen Wu Xiangdong Guo Fuxin Guan Yu Duan Lauren LZhang Xiaoxia Yang Na Liu Qing Dai Shuang Zhang New Cornerstone Science Laboratory Department of PhysicsUniversity of Hong KongHong KongChina CAS Key Laboratory of Nanophotonic Materials and Devices CAS Key Laboratory of Standardization and Measurement for NanotechnologyCAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijingChina Department of Chemistry and Chemical Biology Harvard UniversityCambridgeMA 02138USA 2^(nd)Physics Institute University of StuttgartPfaffenwaldring 5770569 StuttgartGermany Max Planck Institute for Solid State Research D‑70569 StuttgartGermany Department of Electrical and Electronic Engineering University of Hong KongHong KongChina

Sensors have emerged as indispensable analytical tools across a wide range of important fields,encompassing environmental monitoring,food safety,and public *** facilitate early disease diagnosis,personalized medicine,and rapid detection of toxic ***,detecting trace molecules remains a significant *** infrared absorption(SEIRA)based on plasmonic nanostructures,particularly graphene,has emerged as a promising approach to enhance sensing *** graphene-based SEIRA offers advantages such as high sensitivity and active tunability,intrinsic molecular damping weakens the interaction between vibrational modes and ***,we demonstrate ultrahigh-sensitive molecular sensing based on synthesized complex-frequency waves(CFW).Our experiment shows that CFW can amplify the molecular signals(silk protein monolayer)detected by graphene-based sensor by at least an order of magnitude and can be universally applied to molecular sensing in different *** approach is highly scalable and can facilitate the investigation of light-matter interactions,enabling diverse potential applications in fields such as optical spectroscopy,biomedicine and pharmaceutics.

关键词： excitation diagnosis emerged

来源：评论

学校读者我要写书评

暂无评论

Growth Mode Modulation and Crystalline Quality Improvement of Highly Relaxed N-Al0.6ga0.4n on High-Temperature-Annealing Aln/Sapphire Template Via Sih4-Pretreatment

SSRN

引用

SSRN 2023年

作者： Wang, Dadi Liu, Zhibin Guo, Yanan Yan, Jianchang Li, Jinmin Wang, Junxi Research and Development Center for Solid-State Lighting Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China Beijing Engineering Research Center for the third Generation Semiconductor Materials and Application Beijing100083 China State Key Laboratory of Solid-State Lighting Beijing100081 China

High-quality AlGaN-based film is the key to attain efficient deep ultraviolet emitters. In this study, we developed a silane-pretreatment method to modulate the growth mode of n-Al0.6Ga0.4N on high-temperature-annealing AlN/sapphire template (HTA-AlN) and improve the crystalline quality. It’s found that pretreating the surface of HTA-AlN template by SiH4 could disturb the pseudo-crystal epitaxy of n-Al0.6Ga0.4N and prompt the 3D growth at the AlGaN/AlN interface. The stress of n-Al0.6Ga0.4N was thus released rapidly by fresh-born dislocations. During the following growth, the growth mode of n-Al0.6Ga0.4N with SiH4-pretreatment transformed quickly from 3D to 2D, and the stress was released gradually because of the dislocation inclination. Besides, the threading dislocation density of 6 µm-thick n-Al0.6Ga0.4N with SiH4-pretreatment was reduced to 8.6 [[EQUATION]] 108 cm-2, which was one third of that without SiH4-pretreatments. This work paves the way for preparation and improvement of the DUV emitters. © 2023, The Authors. All rights reserved.

关键词： III-V semiconductors

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：