检索结果-内蒙古大学图书馆

A Brief Review of High Entropy Alloys and Serration Behavior and Flow Units

Journal of Iron and Steel Research International 2016年第1期23卷 2-6页

作者： Yong ZHANG Jun-wei QIAO Peter K.LIAW State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Laboratory of Applied Physics and Mechanics of Advanced Materials College of Materials Science and EngineeringTaiyuan University of Technology Department of Materials Science and Engineering University of Tennessee

Multicomponent alloys with high entropy of mixing,e.g.,high entropy alloys（HEAs）and/or multiprincipal-element alloys（MEAs）,are attracting increasing attentions,because the materials with novel properties are being developed,based on the design strategy of the equiatomic ratio,multicomponent,and high entropy of mixing in their liquid or random solution ***,HEAs with the ultrahigh strength and fracture toughness,excellent magnetic properties,high fatigue,wear and corrosion resistance,great phase stability/high resistance to heat-softening behavior,sluggish diffusion effects,and potential superconductivity,etc.,were *** HEAs can even have very high irradiation resistance and may have some self-healing effects,and can potentially be used as the first wall and nuclear fuel cladding *** behaviors and flow units are powerful methods to understand the plastic deformation or fracture of *** methods have been successfully used to study the plasticity of amorphous alloys（also bulk metallic glasses,BMGs）.The flow units are proposed as：free volumes,shear transition zones（STZs）,tension-transition zones（TTZs）,liquid-like regions,soft regions or soft spots,*** flow units in the crystalline alloys are usually dislocations,which may interact with the solute atoms,interstitial types,or substitution ***,the flow units often change with the testing temperatures and loading strain rates,e.g.,at the low temperature and high strain rate,plastic deformation will be carried out by the flow unit of twinning,and at high temperatures,the grain boundary will be the weak area,and play as the flow *** serration shapes are related to the types of flow units,and the serration behavior can be analyzed using the power law and modified power law.

关键词： high entropy alloy bulk metallic glass serration behavior flow unit

来源：评论

学校读者我要写书评

暂无评论

4D Electronic Systems: Transformable, Freestanding 3D Mesostructures Based on Transient materials and Mechanical Interlocking (Adv. Funct. Mater. 40/2019)

引用

Advanced Functional materials 2019年第40期29卷

作者： Yoonseok Park Haiwen Luan Kyeongha Kwon Shiwei Zhao Daniel Franklin Heling Wang Hangbo Zhao Wubin Bai Jong Uk Kim Wei Lu Jae‐Hwan Kim Yonggang Huang Yihui Zhang John A. Rogers Center for Bio‐Integrated Electronics Northwestern University Evanston IL 60208 USA Department of Mechanical Engineering Department of Civil and Environmental Engineering Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA School of Aeronautic Science and Engineering Beihang University Beijing 100191 P. R. China School of Chemical Engineering Sungkyunkwan University (SKKU) Suwon 16419 Republic of Korea Frederick Seitz Materials Research Laboratory Department of Materials Science and Engineering University of Illinois at Urbana–Champaign Urbana IL 61801 USA Center for Bio‐Integrated Electronics Department of Mechanical Engineering Department of Civil and Environmental Engineering Department of Materials Science and Engineering Northwestern University Evanston IL 60208 USA Center for Flexible Electronics Technology Applied Mechanics Laboratory Department of Engineering Mechanics Tsinghua University Beijing 100084 P. R. China Department of Materials Science and Engineering Biomedical Engineering Neurological Surgery Chemistry Mechanical Engineering Electrical Engineering and Computer Science Simpson Querrey Institute and Feinberg Medical School Center for Bio‐Integrated Electronics Northwestern University Evanston Evanston IL 60208 USA

来源：评论

学校读者我要写书评

暂无评论

Discovering minimum energy pathways via distortion symmetry groups

引用

Physical Review B 2018年第8期98卷 085107-085107页

作者： Jason M. Munro Hirofumi Akamatsu Haricharan Padmanabhan Vincent S. Liu Yin Shi Long-Qing Chen Brian K. VanLeeuwen Ismaila Dabo Venkatraman Gopalan Department of Materials Science and Engineering and Materials Research Institute The Pennsylvania State University University Park Pennsylvania 16802 USA Penn State Institutes of Energy and the Environment The Pennsylvania State University University Park Pennsylvania 16802 USA Department of Applied Chemistry Kyushu University Fukuoka 819-0395 Japan Two Sigma Investments New York New York 10013 USA Department of Physics The Pennsylvania State University University Park Pennsylvania 16802 USA Department of Engineering Science and Mechanics The Pennsylvania State University University Park Pennsylvania 16802 USA

Physical systems evolve from one state to another along paths of least energy barrier. Without a priori knowledge of the energy landscape, multidimensional search methods aim to find such minimum energy pathways between the initial and final states of a kinetic process. However, in many cases, the user has to repeatedly provide initial guess paths, thus implying that the reliability of the final result is heavily user-dependent. Recently, the idea of “distortion symmetry groups” as a complete description of the symmetry of a path has been introduced. Through this, a new framework is enabled that provides a powerful means of classifying the infinite collection of possible pathways into a finite number of symmetry equivalent subsets, and then exploring each of these subsets systematically using rigorous group theoretical methods. The method, which we name the distortion symmetry method, is shown to lead to the discovery of previously hidden pathways for the case studies of bulk ferroelectric switching and domain wall motion in proper and improper ferroelectrics, as well as in multiferroic switching. These provide novel physical insights into the nucleation of switching pathways at experimentally observed domain walls in Ca3Ti2O7, as well as how polarization switching can proceed without reversing magnetization in BiFeO3. Furthermore, we demonstrate how symmetry-breaking from a highly symmetric pathway can be used to probe the non-Ising (Bloch and Néel) polarization components integral to transient states involved in switching in PbTiO3. The distortion symmetry method is applicable to a wide variety of physical phenomena ranging from structural, electronic and magnetic distortions, diffusion, and phase transitions in materials.

关键词： Ferroelectricity Magnetization switching Ferroelectrics Multiferroics Density functional theory Symmetries

来源：评论

学校读者我要写书评

暂无评论

Application of Onsager's variational principle to the dynamics of a solid toroidal island on a substrate

arXiv

引用

arXiv 2018年

作者： Jiang, Wei Zhao, Quan Qian, Tiezheng Srolovitz, David J. Bao, Weizhu School of Mathematics and Statistics Wuhan University Wuhan430072 China Computational Science Hubei Key Laboratory Wuhan University Wuhan430072 China Department of Mathematics National University of Singapore Singapore119076 Singapore Department of Mathematics Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Departments of Materials Science and Engineering University of Pennsylvania PhiladelphiaPA19104 United States Departments of Mechanical Engineering and Applied Mechanics University of Pennsylvania PhiladelphiaPA19104 United States Departments of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong

In this paper, we consider the capillarity-driven evolution of a solid toroidal island on a flat rigid substrate, where mass transport is controlled by surface diffusion. This problem is representative of the geometrical complexity associated with the solid-state dewetting of thin films on substrates. We apply Onsager's variational principle to develop a general approach for describing surface diffusion-controlled problems. Based on this approach, we derive a simple, reduced-order model and obtain an analytical expression for the rate of island shrinking and validate this prediction by numerical simulations based on a full, sharp-interface model. We find that the rate of island shrinking is proportional to the material constants B and the surface energy density 0, and is inversely proportional to the island volume V0. This approach represents a general tool for modeling interface diffusion-controlled morphology evolution. Copyright © 2018, The Authors. All rights reserved.

关键词： Substrates

来源：评论

学校读者我要写书评

暂无评论

Glypican-1-antibody-conjugated Gd–Au nanoclusters for FI/MRI dual-modal targeted detection of pancreatic cancer

引用

International Journal of Nanomedicine 2018年 13卷 2585-2599页

作者： Xin Huang Chengqi Fan Huanhuan Zhu Wenjun Le Shaobin Cui Xin Chen Wei Li Fulei Zhang Yong Huang Donglu Sh Zheng Cui Chengwei Shao Bingdi Chen 1 The Institute for Translational Nanomedicine Shanghai East Hospital The Institute for Biomedical Engineering & Nano Science Tongji University School of Medicine Shanghai China 2 Radiology Department of Changhai Hospital The Second Military Medical University Shanghai China 3 Department of Thyroid Surgery The First Bethune Hospital of Jilin University Jilin China 4 International Joint Cancer Institute The Second Military Medical University Shanghai China 1 The Institute for Translational Nanomedicine Shanghai East Hospital The Institute for Biomedical Engineering & Nano Science Tongji University School of Medicine Shanghai China5 The Materials Science & Engineering Program Department of Mechanical & Materials Engineering College of Engineering & Applied Science University of Cincinnati OH USA 1 The Institute for Translational Nanomedicine Shanghai East Hospital The Institute for Biomedical Engineering & Nano Science Tongji University School of Medicine Shanghai China6 Department of Pathology Wake Forest University School of Medicine Winston-Salem NC USA

IntroductionPancreatic cancer (PC) has a poor prognosis with high mortality, due to the lack of effective early diagnostic and prognostic *** and methodsIn order to target and diagnose PC, we developed a dual-modal imaging probe using Glypican-1 (GPC-1) antibody conjugated with Gd–Au nanoclusters (NCs; Gd-Au-NC-GPC-1). GPC-1 is a type of cell surface heparan sulfate proteoglycan, which is often highly expressed in PC. The probe was successfully prepared with a hydrodynamic diameter ranging from 13.5 to 24.4 *** characteristics showed absorption at 280 nm and prominent emission at 650 nm. Confocal microscopic imaging showed effective detection of GPC-1 highly expressed PC cells by Gd-Au-NC-GPC-1, which was consistent with flow cytometry results. In vitro relaxivity characterization demonstrated that the r1 value of the probe was 17.722 s−1mM−1Gd, which was almost 4 times higher compared with that of Gd-diethylenetriaminepentacetate (DTPA; r1 value =4.6 s−1mM−1Gd). Gd-Au-NC-GPC-1 exhibited similar magnetic resonance (MR) signals when compared to Gd-DTPA even at lower Gd concentrations. Much higher MR signals were registered in PC cells (COLO-357) compared with normal cells (293T). Furthermore, Gd-Au-NC-GPC-1 could effectively detect PC cells in vivo by dual-modal fluorescence imaging/magnetic resonance imaging (FI/MRI) at 30 minutes postinjection. In addition, Gd-Au-NC-GPC-1 did not show significant biotoxicity to normal cells at tested concentrations both in vitro and in ***-Au-NC-GPC-1 has demonstrated to be a promising dual-modal FI/MRI contrast agent for targeted diagnosis of PC.

关键词： pancreatic cancer Glypican-1 fluorescence imaging magnetic resonance imaging Gd–Au NCs

来源：评论

学校读者我要写书评

暂无评论

A new symmetry-based framework for discovering minimum energy pathways

arXiv

引用

arXiv 2018年

作者： Munro, Jason M. Akamatsu, Hirofumi Padmanabhan, Haricharan Liu, Vincent S. Shi, Yin Chen, Long-Qing VanLeeuwen, Brian K. Dabo, Ismaila Gopalan, Venkatraman Department of Materials Science and Engineering Materials Research Institute Penn State Institutes of Energy and the Environment Pennsylvania State University University ParkPA16802 United States Department of Applied Chemistry Kyushu University Fukuoka819-0395 Japan Two Sigma Investments New YorkNY10013 United States Department of Physics Pennsylvania State University University ParkPA16802 United States Department of Engineering Science and Mechanics Pennsylvania State University University ParkPA16802 United States

Physical systems evolve from one state to another along paths of least energy barrier. Without a priori knowledge of the energy landscape, multidimensional search methods aim to find such minimum energy pathways between the initial and final states of a kinetic process. However in many cases, the user has to repeatedly provide initial guess paths, thus ensuring that the reliability of the final result is heavily user-dependent. Recently, the idea of "distortion symmetry groups" as a complete description of the symmetry of a path has been introduced. Through this, a new framework is enabled that provides a powerful means of classifying the infinite collection of possible pathways into a finite number of symmetry equivalent subsets, and then exploring each of these subsets systematically using rigorous group theoretical methods. The method is shown to lead to the discovery of new, previously hidden pathways for the case studies of bulk ferroelectric switching and domain wall motion in proper and improper ferroelectrics, as well as in multiferroic switching. This approach is applicable to a wide variety of physical phenomena ranging from structural, electronic and magnetic distortions, diffusion, and phase transitions in materials. Copyright © 2018, The Authors. All rights reserved.

关键词： Domain walls

来源：评论

学校读者我要写书评

暂无评论

Photoresponsive materials: Photoprogrammable Mesogenic Soft Helical Architectures: A Promising Avenue toward Future Chiro‐Optics (Adv. Mater. 41/2020)

引用

Advanced materials 2020年第41期32卷

作者： Zhi‐Gang Zheng Yan‐Qing Lu Quan Li Department of Physics East China University of Science and Technology Shanghai 200237 China National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and Manipulation Collaborative Innovation Center of Advanced Microstructures and College of Engineering and Applied Sciences Nanjing University Nanjing 210093 China Advanced Materials and Liquid Crystal Institute and Chemical Physics Interdisciplinary Program Kent State University Kent OH 44242 USA

来源：评论

学校读者我要写书评

暂无评论

End-to-end symmetry preserving inter-atomic potential energy model for finite and extended systems

arXiv

引用

arXiv 2018年

作者： Zhang, Linfeng Han, Jiequn Wang, Han Saidi, Wissam A. Car, Roberto Weinan, E. Program in Applied and Computational Mathematics Princeton University United States Institute of Applied Physics and Computational Mathematics China CAEP Software Center for High Performance Numerical Simulation China Department of Mechanical Engineering and Materials Science University of Pittsburgh United States Department of Chemistry and Department of Physics Princeton University United States Princeton Institute for the Science and Technology of Materials Princeton University United States Department of Mathematics Princeton University United States Beijing Institute of Big Data Research China

Machine learning models are changing the paradigm of molecular modeling, which is a fundamental tool for material science, chemistry, and computational biology. Of particular interest is the inter-atomic potential energy surface (PES). Here we develop Deep Potential - Smooth Edition (DeepPot-SE), an end-to-end machine learning-based PES model, which is able to efficiently represent the PES of a wide variety of systems with the accuracy of ab initio quantum mechanics models. By construction, DeepPot-SE is extensive and continuously differentiable, scales linearly with system size, and preserves all the natural symmetries of the system. Further, we show that DeepPot-SE describes finite and extended systems including organic molecules, metals, semiconductors, and insulators with high fidelity. Copyright © 2018, The Authors. All rights reserved.

关键词： Potential energy

来源：评论

学校读者我要写书评

暂无评论

Strain energy density application in multiscale fatigue and fracture 14

Strain energy density application in multiscale fatigue and ...

引用

14th International Conference on Fracture, ICF 2017

作者： Tang, K.K. Berto, F. Ferro, P. Ayatollahi, M.R. School of Aerospace Engineering and Applied Mechanics Tongji University Shanghai200092 China NTNU Department of Engineering Design and Materials Trondheim Norway Department of Engineering and Management University of Padova Stradella S. Nicola Vicenza36100 Italy Iran University of Science and Technology Teheran Iran

The monoscale consideration will not be applicable to multiscale materials, which motivates the formulation of multiscale fatigue model for metal materials. Scale segmentation involves multiple ranges. Strain energy density (SED) criterion could be a possible way to the solution of multiscale fatigue and fracture. Base on SED criterion, a multiscale fatigue crack growth model is formulated. Results show the multiscale model is able to offer reasonable explanation for fatigue test. © 2017 ICF 2017 - 14th International Conference on Fracture. All rights reserved.

关键词： Fatigue crack propagation

来源：评论

学校读者我要写书评

暂无评论

Positive Staining for Improved Contrast Of Macromolecules In Transmission Electron Microscopy

引用

Microscopy and Microanalysis 2018年第S1期24卷 1730-1731页

作者： Kelly A. Parker Yue Li Adam Eshein Shengshuang Zhu Cheri M. Hampton Lawrence F. Drummy Vinayak P. Dravid Department of Materials Science & Engineering Northwestern University Evanston Illinois60208 Applied Physics Program Northwestern University Evanston Illinois 60208 Department of Biomedical Engineering Northwestern University Evanston Illinois60208 Materials and Manufacturing Directorate Air Force Research Laboratory WPAFB OH45433 Electron Probe Instrumentation Center (EPIC) Facility NUANCE Center Northwestern University Evanston Illinois60208

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：