检索结果-内蒙古大学图书馆

SSRN 2022年

作者： Peng, Zichao Zheng, Zebang Wang, Xuqing Zou, Jinwen Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical Materials AECC Beijing100095 China State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of High-Performance Precision Forming Technology and Equipment School of Materials Science and Engineering Northwestern Polytechnical University P.O. Box 542 Xi’an710072 China

In this study, the fatigue behaviors of a nickel-based superalloys FGH96 with different microstructural morphologies generated from different heat-treatment processes were investigated. The fatigue and dwell-fatigue tests with the same maximum stress of 1200 MPa were conducted at 650°C. The relationship between the γ’ morphology and the fatigue properties was established. The results indicate that the critical shearing stress of dislocation movement played a key role in affecting the fatigue life. No apparent difference can be observed from the fracture morphology at the macroscopic scale for normal fatigue and dwell-fatigue tests. However, in the crack initiation region, the crack was observed to grow along the grain boundary for the dwell-fatigue condition and resulting in the intergranular fracture, which was similar to creep failure. The introduction of dwell time in the fatigue loading brings larger cyclic strain deformation originates from massive dislocation slip. The dwell debit for the considered loading condition is about 100 times. © 2022, The Authors. All rights reserved.

关键词： Fatigue of materials

来源：评论

学校读者我要写书评

暂无评论

Dopamine hydrochloride and carboxymethyl chitosan coatings for multifilament surgical suture and their influence on friction during sliding contact with skin substitute

引用

Friction 2020年第1期8卷 58-69页

作者： Gangqiang ZHANG Ganlin ZHENG Tianhui REN Xiangqiong ZENG Emile van der HEIDE Advanced Lubricating Materials Laboratory Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Institute of Functional Textiles and Advanced Materials Colloge of Textlies&ClothingQingdao UniversityQingdao 266000China School of Chemistry and Chemical Engineering Key Laboratory of Thin Film and Microfabrication Technology(Ministry of Education)Shanghai Jiao Tong UniversityShanghai 200240China Laboratory for Surface Technology and Tribology University of TwenteEnschede 7500AEThe Netherlands TU Delft Faculty of Civil Engineering and GeosciencesStevinweg 1Delft 2628 CNThe Netherlands Soete Laboratory Ghent UniversityZwijnaarde B-9052Belgiu

In order to reduce the damage to tissue and fill the interstices between fibers,multifilament sutures are frequently treated with certain coating *** objective of this study was to create and characterize dopamine hydrochloride(DA)and carboxymethyl chitosan(CMCS)coatings on surgical sutures and investigate their effects on the frictional performance of the surgical sutures during sliding through a skin *** effects of the treatment on the physical and chemical characteristics of the surgical sutures were *** friction force of the surgical sutures during sliding through the skin substitute was experimentally determined using a penetration friction *** coefficient of friction(COF)was calculated using a linear elastic model and was used to estimate the frictional behavior of the surgical suture‐skin *** results showed that the DA coating could evenly deposit on the surface of the etched multifilament surgical suture surfaces in a weakly alkaline buffer *** CMCS coating material could form a uniform film on the surface of the *** changes in the surface roughness of the multifilament surgical sutures with different treatments occurred in this *** friction force and the COF of the multifilament surgical sutures with DA and CMCS coating showed little change when compared with untreated multifilament surgical sutures.

关键词： friction surgical suture coating Biomaterials skin substitute

来源：评论

学校读者我要写书评

暂无评论

Oxidative Coupling of Methanol with Molecularly Adsorbed Oxygen on Au surface to Methyl Formate

引用

Journal of Physical Chemistry Letters 2021年第29期12卷 6941-6945页

作者： Sun, Guanghui Wang, Fang Jin, Yuekang Chen, Xuanye Chai, Peng Wu, Longxia Teng, Bo-Tao Huang, Weixin Hefei National Laboratory for Physical Sciences Microscale Key Laboratory of Surface and Interface Chemistry and Energy Catalysis Anhui Higher Education Institutes Department of Chemical Physics University of Science and Technology of China Hefei 230026 China Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry Zhejiang Normal University 321004 Jinhua China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Dalian 116023 China Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization College of Chemical Engineering and Materials Science Tianjin University of Science and Technology Tianjin 300457 China

Supported Au catalysts efficiently catalyze the oxidative coupling of methanol with O2 to methyl formate, in which the atomic O species (O(a)) formed via O2 dissociation on the Au surface has been considered as the active oxygen species. Herein we report for the first time that the oxidative coupling of methanol can occur facilely with molecularly adsorbed O2 species (O2(a)) on a Au(997) surface at temperatures as low as around 125 K, while that with O(a) occurs at around 175 K. Both experimental and theoretical calculation results demonstrate a novel reaction mechanism of oxidative coupling of CH3OH with O2(a) via a dioxymethylene (H2COO) intermediate, resulting in the production of both HCOOCH3 and HCOOCH3. These results reveal the unique reactivity of molecularly adsorbed O2 species on Au surfaces for low-temperature oxidation reactions. © 2021 American Chemical Society.

关键词： Desorption Alcohols Gold Oxidative coupling Annealing (metallurgy)

来源：评论

学校读者我要写书评

暂无评论

Left-handed optical torque on dipolar plasmonic nanoparticles induced by Fano-like resonance

引用

Physical Review B 2022年第5期106卷 054301-054301页

作者： Huajin Chen Lv Feng Jiangnan Ma Chenghua Liang Zhifang Lin Hongxia Zheng School of Electronic Engineering Guangxi University of Science and Technology Liuzhou Guangxi 545006 China School of Automation Guangxi University of Science and Technology Liuzhou Guangxi 545006 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

We theoretically and numerically demonstrate that Fano-like resonance can induce a left-handed optical torque on a dipolar plasmonic core-shell nanoparticle in the interference optical field composed of two linearly polarized plane waves. It is shown that the optical torque on the dipolar plasmonic nanoparticle is significantly enhanced at the Fano-like resonance, and its direction is opposite to that of the angular momentum of the incident field, termed Fano-like resonance-induced left-handed optical torque. The extinction spectra exhibit that the Fano-like resonance stems from the coupling between a narrow electric quadrupole dark mode and a broad electric dipole bright mode. In addition, such Fano-like resonance-induced left-handed optical torque can flexibly be tailored by the particle morphology. To further trace the physical origin of the left-handed optical torque, we derive an analytical expression of optical torques up to electric quadrupole in generic monochromatic optical fields based on the multipole expansion theory. The results obtained from our analytical expression show that the left-handed optical torque comes completely from the electric quadrupole terms while other terms from the electric dipole make no contribution. Our results may open a new avenue for tailoring optical torques on plasmonic structures.

关键词： Angular momentum of light Light-matter interaction Optomechanics

来源：评论

学校读者我要写书评

暂无评论

Effect of Sigma Phases Precipitation on the Moderate Temperature Mechanical Properties of Fe20cr9ni Cass Used for Primary Coolant Pipe of Nuclear Power Plant

SSRN

引用

SSRN 2022年

作者： Wang, Yongqiang Ge, Zhangqi Li, Na Lin, Suhua Zheng, Chengsi Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of Education Anhui University of Technology Anhui Maanshan243002 China School of Material Science and Engineering Anhui University of Technology Anhui Maanshan243032 China School of Metallurgical Engineering Anhui University of Technology Anhui Maanshan243032 China

Effect of sigma phases on moderate temperature mechanical properties of a Fe20Cr9Ni casting austenite stainless steel was investigated by means of isothermal treatment, scanning electron microscope, transmission electron microscope, nano-indentation instrument, tensile testing and finite element simulation. The results show that yield strength and ultimate tensile strength at moderate temperature increased with the increasing of sigma phase, while, elongation after fracture decreased. Strain hardening rate of aged specimens with sigma phases is higher than that of unaged specimens without sigma phases at a certain low strain range (below 0.117). However, the value of strain hardening rate of aged specimens is lower than that of unaged specimens when the strain is above 0.117. The effect of sigma phase on mechanical properties at moderate temperature is more significant and sensitive. The precipitation of sigma phase brings many high energy σ/γ2 and α/σ/γ2 interfaces. On one hand, dislocation movement is hindered and accumulated to some extent, and so the strength enhanced and strain hardening rate improved firstly. On the other hand, the initiation and propagation of micro cracks at the interfaces is more easily when strain is above a certain value, thus, the elongation value decreased and strain hardening rate reduced then. © 2022, The Authors. All rights reserved.

关键词： Tensile testing

来源：评论

学校读者我要写书评

暂无评论

Significantly Enhanced Performance of Li-Storage Via In-Situ Oxidation of Silicon Particles by Zinc Oxide

SSRN

引用

SSRN 2023年

作者： Wang, Shuai Wu, Qinyu Cai, Zhenfei Ding, Bo Ahsan, Zishan Ma, Yangzhou Song, Guangsheng Yu, Zexin Yang, Weidong Wen, Cuie Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of Education School of Materials Science and Engineering Anhui University of Technology Maanshan243000 China School of Mechanical and Electrical Engineering Soochow University Suzhou215123 China Future Manufacturing Flagship Commonwealth Scientific and Industry Research Organization MelbourneVIC3168 Australia School of Engineering RMIT University MelbourneVIC3001 Australia

The synthesis of Si-based composite material can be realized via the reduction of ZnO by excess Si during ball milling. The presence of the reacted products Zn and SiO in the Si matrix was confirmed by X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy analysis. The composite material was coated with carbon by a high-temperature carburizing process. The carbon-coated composite material shows excellent cycling stability at a high-capacity rate of 0.2C by demonstrating a capacity retention rate of 78.05% at 300 cycles and the corresponding charging-specific capacity of 697 mAh g-1. These results indicate that the nanocrystalline Zn and amorphous SiO products from the solid-state reaction of cheap Si and ZnO are very effective in improving the cycling stability of Si-based composite material. © 2023, The Authors. All rights reserved.

关键词： Zinc oxide

来源：评论

学校读者我要写书评

暂无评论

Field-tuned magnetic structure and phase diagram of the honeycomb magnet YbCl_(3)

引用

Science China(Physics,Mechanics & Astronomy) 2021年第3期64卷 84-89页

作者： YiQing Hao HongLiang Wo YiMeng Gu XiaoWen Zhang YiQing Gu ShiYi Zheng Yang Zhao GuangYong Xu Jeffrey WLynn Kenji Nakajima Naoki Murai WenBin Wang Jun Zhao State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200433China NIST Center for Neutron Research National Institute of Standards and TechnologyGaithersburg 20899USA Department of Materials Science and Engineering University of MarylandCollege Park 20742USA J-PARC Center Japan Atomic Energy Agency(JAEA)Ibaraki 319-1195Japan Institute of Nanoelectronic Devices and Quantum Computing Fudan UniversityShanghai 200433China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China

We report thermodynamic and neutron diffraction measurements on the magnetic ordering properties of the honeycomb lattice magnet YbCl_(3). We find YbCl_(3) exhibits a Ne′el type long-range magnetic order at the wavevector(0, 0, 0) below TN= 600 *** magnetic order is associated with a small sharp peak in heat capacity and most magnetic entropy release occurs above the magnetic ordering temperature. The magnetic moment lies in-plane, parallel to the monoclinic a-axis, whose magnitude mYb= 0.86(3) μBis considerably smaller than the expected fully ordered moment of 2.24 μBfor the doublet crystal-field ground state. The magnetic ordering moment gradually increases with increasing magnetic field perpendicular to the ab-plane, reaching a maximum value of 1.6(2) μBat 4 T, before it is completely suppressed above ~ 9 T. These results indicate the presence of strong quantum fluctuations in YbCl_(3).

关键词： magnetic order neutron diffraction honeycomb lattice

来源：评论

学校读者我要写书评

暂无评论

Plasmon Ti3c2 Mxene Coupling with Mos2 Nanobelt Mediated Self-Powered Photoelectrochemical Sensing for Sensitive Detection of Chloramphenicol

SSRN

引用

SSRN 2023年

作者： Jiang, Ding Wei, Meng Du, Xiaojiao Zhang, Yude Shan, Xueling Wang, Wenchang Shiigi, Hiroshi Chen, Zhidong Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology School of Petrochemical Engineering Changzhou University Jiangsu Changzhou213164 China Oakland International Associated Laboratory School of Photoelectric Engineering Changzhou Institute of Technology Jiangsu Changzhou213032 China Jiangsu Key Laboratory of Materials Surface Science and Technology Changzhou University Jiangsu Changzhou213164 China Analysis and Testing Center NERC Biomass of Changzhou University Jiangsu213032 China Department of Applied Chemistry Osaka Prefecture University 1-2 Gakuen Naka Sakai Osaka599-8570 Japan

Herein, a sensitive self-powered photoelectrochemical(PEC) aptasensor was fabricated based on MoS2/Ti3C2 heterojunction, of which MoS2 nanobelt first in situ grown onto the plasmon Ti3C2 MXene via one-step thermal treatment method. With the introduction of nonmetallic plasmonic Ti3C2, the MoS2/Ti3C2 heterojunction displayed surface plasma resonance (SPR) effect and fast electron transfer capacity, resulting in enhanced visible-light harvesting, improved charge separation, and high photoelectric conversion efficiency, which was beneficial for constructing high-sensitive PEC platforms. Notably, the photocurrent of the as-fabricated MoS2/Ti3C2 heterojunction was 5-fold higher than that of pure MoS2. Because of the excellent PEC properties of the MoS2/Ti3C2 heterostructure, a new ultrasensitive PEC aptasensor was fabricated with the assistance of chloramphenicol (CAP) aptamer. The proposed aptasensor displayed satisfactory stability and high selectivity with a wide linear response range of 0.1 nM to 0.01 mM and a low detection limit of 0.034 nM, which can be successfully applied to CAP detection in environmental samples. This work provided a novel signal amplification strategy for the innovative construction of high-performance self-powered PEC sensing platforms. © 2023, The Authors. All rights reserved.

关键词： Molybdenum compounds

来源：评论

学校读者我要写书评

暂无评论

Dynamically controlling terahertz wavefronts with cascaded metasurfaces

引用

advanced Photonics 2021年第3期3卷 93-102页

作者： Xiaodong Cai Rong Tang Haoyang Zhou Qiushi Li Shaojie Ma Dongyi Wang Tong Liu Xiaohui Ling Wei Tan Qiong He Shiyi Xiao Lei Zhou Shanghai University Key Laboratory of Specialty Fiber Optics and Optical Access NetworksJoint International Research Laboratory of Specialty Fiber Optics and Advanced CommunicationShanghai Institute for Advanced Communication and Data ScienceShanghaiChina Fudan University State Key Laboratory of Surface PhysicsKey Laboratory of Micro and Nano Photonic Structures(Ministry of Education)and Physics DepartmentShanghaiChina Hengyang Normal University College of Physics and Electronic EngineeringHengyangChina CAEP Microsystem and Terahertz Research CenterChengduChina CAEP Institute of Electronic EngineeringMianyangChina Fudan University Academy for Engineering and TechnologyShanghaiChina Collaborative Innovation Centre of Advanced Microstructures NanjingChina

Dynamically controlling terahertz(THz)wavefronts in a designable fashion is highly desired in ***,available methods working at microwave frequencies do not work well in the THz regime due to lacking suitable tunable elements with submicrometer ***,instead of locally controlling individual meta-atoms in a THz metasurface,we show that rotating different layers(each exhibiting a particular phase profile)in a cascaded metadevice at different speeds can dynamically change the effective Jonesmatrix property of the whole device,thus enabling extraordinary manipulations on the wavefront and polarization characteristics of a THz beam impinging on the *** illustrating our strategy based on model calculations,we experimentally demonstrate two proof-of-concept metadevices,each consisting of two carefully designed all-silicon transmissive metasurfaces exhibiting different phase *** two metasurfaces inside the fabricated devices at different speeds,we experimentally demonstrate that the first metadevice can efficiently redirect a normally incident THz beam to scan over a wide solid-angle range,while the second one can dynamically manipulate both the wavefront and polarization of a THz *** results pave the way to achieving dynamic control of THz beams,which is useful in many applications,such as THz radar,and bio-and chemical sensing and imaging.

关键词： terahertz beam-steering dielectric metasurfaces linear gradient phase

来源：评论

学校读者我要写书评

暂无评论

Study on the bonding strength and thermal shock resistance of thermal barrier coatings regulated by interface texture

引用

surface and Coatings technology 2025年 512卷

作者： Jing, Yongzhi Cui, Xiufang Jin, Guo Chen, Zhuo Fang, Yongchao Zhang, Chong Li, Xinlin Qin, Cheng Institute of Surface/Interface Science and Technology Key Laboratory of Superlight Material and Surface Technology of Ministry of Education College of Material Science and Chemical Engineering Harbin Engineering University Harbin150001 China Northwest Institute for Nonferrous Metal Research Xi'an710016 China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material Beijing Beijing Institute of Aeronautical Materials Beijing100095 China

Regulating the microstructure of thermal barrier coating interfaces is an effective approach to enhance the thermal stability of the coatings. In this study, high-energy beam laser was used to texture the interface between the bond coat and the ceramic coat (circumferential type, Class C;Kagome type, Class K). The tensile bonding strength and strain capacity of the textured thermal barrier coatings were higher than those of the non-textured coatings. Texturing increases the unit contact area ratio (U) at the interface between the bond coat and the ceramic layer, which helps the coating resist thermal stress impact, reduces the spallation area ratio (Sar) and the spallation rate. Among them, Class C texture can effectively delay the rate of microcrack propagation, while Class K texture has a dual effect of circumferential restraint and suppression of inelastic deformation at the interface. The Kagome-type (Class K) textured coatings have a lower spallation rate than the circumferential-type (Class C) textured coatings. The coating with K2 interface texture exhibits the best thermal shock resistance, with a surface spallation area ratio of only 9.38 % after 120 thermal shock cycles;whereas the non-textured coating has a spallation area of about 13.7 % after the same number of thermal shock cycles. This research provides potential application value for the regulation of interface stability in thermal barrier coatings. © 2025

关键词： Thermal barrier coatings

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：