检索结果-南通市图书馆

Chinese Journal of Polymer Science 2024年第10期42卷 1595-1601,I0015页

作者： Meng Wei Wei-Hao Feng Chen Yu Zhen-Yi Jiang Guang-Qiang Yin Wei Lu Tao Chen Key Laboratory of Advanced Marine materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China School of Chemical sciences University of Chinese Academy of SciencesBeijing100049China School of materials Science and Chemical Engineering Ningbo UniversityNingbo315211China

Achieving versatile room temperature phosphorescence(RTP)materials,especially with tunable mechanical properties and shape memory is attractive and essential but rarely ***,a strategy was reported to realize multi-functional RTP films with multicolor fluorescence,ultralong afterglow,adjustable mechanical properties,and shape memory through the synergistic dynamic interaction of lanthanide(Ln~Ⅲ)-terpyridine coordination,borate ester bonds,and hydrogen bondings in a poly(vinyl alcohol)(PVA)*** varying the amount of borax,the mechanical properties of the films could be finely controlled due to the change of crosslinking degree of dynamic borate ester bonds in *** assembly and disassembly of borate ester bonds upon the trigger of borax and acid were applied as reversible linkage to achieve programmable shape memory *** addition,the films displayed both fascinating multicolor fluorescence and ultralong afterglow characteristics due to the presence of Ln III doping and confinement of terpyridine in *** study provides a new avenue to impart modulable mechanical strength and shape memory to RTP materials.

关键词： Room temperature phosphorescence materials Dynamic bonds Multicolor fluorescent Tunable mechanical properties Shape memory

Corrosion Resistance of Graphene-Reinforced Waterborne Epoxy Coatings

在线全文

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 2016年第5期32卷 425-431页

作者： Shuan Liu Lin Gu Haichao Zhao Jianmin Chen Haibin Yu Key Laboratory of Marine materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective Technologies Ningbo Institute of Materials Technologies and Engineering Chinese Academy of Sciences

Graphene （G） was dispersed uniformly in water and used as an inhibitor in waterborne epoxy coatings. The effect of dispersed G on anticorrosion performance of epoxy coatings was evaluated. The composite coatings displayed outstanding barrier properties against H20 molecule compared to the neat epoxy coating. Open circuit potential （OCP）, Tafel and electrochemical impedance spectroscopy （EIS） analysis confirmed that the corrosion rate exhibited by composite coatings with 0.5 wt% G was an order of magnitude lower than that of neat epoxy coating. Salt spray test results revealed superior corrosion resistance offered by the composite coating.

关键词： Waterborne epoxy coating Graphene Corrosion resistance Electrochemical impedance spectroscopy(EIS)

Rational design of graphene structures for preparing high-performance thermal interface materials: A mini review

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2022年第11期65卷 46-61页

作者： Junfeng Ying Wen Dai Jinhong Yu Nan Jiang Cheng-Te Lin Qingwei Yan Key Laboratory of Marine materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and Engineering(NIMTE)Chinese Academy of SciencesNingbo 315201China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Qianwan Institute Ningbo Institute of Materials Technology and Engineering(NIMTE)Chinese Academy of SciencesNingbo 315201China

With the explosive development in integration of electronic components and the increasing complexity of packaging systems,semiconductor chips own extremely high operation temperatures given by the horrible heat accumulation attributed to the drastically increasing power density. Therefore, highly efficient heat dissipation with the help of rationally designed thermal interface materials(TIMs) is the key to maintaining the device performance and lifespan. Graphene exhibits an ultrahigh intrinsic thermal conductivity, which has attracted a large amount of academic interest due to its significant potential for developing high-performance TIMs. In this tutorial review, we summarize the recent advances in graphene-based TIMs, especially emphasizing the determinate effects of graphene structure and alignment in enhancing the heat transfer capacity of corresponding samples,with detailed discussion in the superiorities and limitations of various graphene skeletons. In addition, we also provide prospects for the challenges and opportunities in the future development of graphene-based TIMs.

关键词： thermal interface material graphene-based composite thermal management thermal conduction

同方期刊数据库

Interactions between dislocations and twins in deformed titanium aluminide crystals

在线全文

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 2019年第3期35卷 402-408页

作者： Guang Yang Shang-Yi Ma Kui Du Dong-Sheng Xu Sen Chen Yang Qi Heng-Qiang Ye School of materials Science and Engineering Northeastern University Shenyang National Laboratory for materials Science Institute of Metal Research Chinese Academy of Sciences Division of Titanium Alloys Institute of Metal Research Chinese Academy of Sciences Department of materials Physics and Chemistry School of Materials Science and Engineering Northeastern University

Using scanning, transmission electron microscopy and aberration-corrected scanning transmission electron microscopy, we have studied the interactions between dislocations and twins in impact deformed polysynthetic twinned TiAl crystal. The 1/3 dislocations with the coherent twin *** abnormal stacking fault was found adjacent to the coherent twin boundary. It has the same stacking sequence but different atom species in the [110] direction with an additional displacement of 1/4[110]in two neighboring {111} layers, and is likely induced by the slip of a 1/12[112](i.e. 1/4[110] + 1/6[211])dislocation.

关键词： TiAl Dynamic deformation Twins Dislocations Abnormal stacking fault

Efficient prediction of corrosion behavior in ternary Ni-based alloy systems:Theoretical calculations and experimental verification

在线全文

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 2023年第36期167卷 94-106页

作者： Xuelian Xiao Keke Chang Kai Xu Ming Lou Liping Wang Qunji Xue Key Laboratory of Marine materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Pourbaix diagrams are calculated to describe electrochemical processes for alloys in aqueous *** the multi-component differentiation of alloy systems,the construction of Pourbaix diagrams is fac-ing challenges,especially for non-single-phase alloy *** this study,the simultaneous construction of phase diagrams and Pourbaix diagrams were implemented for predicting the evolution of the phases in the immune and passive *** CALPHAD(CALculation of PHAse Diagram)approach was used to quickly access the Gibbs free energies of various phases and the chemical potential of the elements in the phases from the thermodynamic database of the Ni-Si-Al-Y *** corrosion behavior of two typical Ni-Al-Si and Ni-Al-Y systems was *** and Y were added to Ni-based alloys to produce the solid solutions L12-Ni_(3)(Al,Si)and L12-Ni_(3)Al+Ni_(5)Y,*** showed that NiO and Al_(2)O_(3)make up the passive area of the Ni_(3)Al 1 *** introduction of SiO_(2)and Y(OH)3 in the passive region separately helped to minimize the alloys’susceptibility to ***,Si reduced the thermody-namical possibility of NiO for mation in the passive film,and the addition of Y caused extreme galvanic *** on Ni-based alloys validated the results through electrochemical *** was also discovered that the presence of Ni_(5)Y produced galvanic corrosion and that Si reduced the oxide in the passive film,causing pitting *** corrosion prediction of the quaternary alloys indicates that the solid solution of Si in Ni_(5)Y reduces the galvanic corrosion effect and the dissolution of passive *** current work demonstrates that phase diagrams and Pourbaix diagrams may be efficiently and accurately predicted using a well-constructed thermodynamic database,which has major implications for future studies on the corrosion behavior of multi-component alloys.

关键词： Pourbaix diagrams CALPHAD Ni-based alloys Passive film

Design of the rare-earth-containing materials based on the micro-alloying phase equilibria, phase diagrams and phase transformations

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 2023年第20期151卷 119-149页

作者： Kai Xu Chengcheng Zhan Ming Lou Xuelian Xiao Ruonan Zhou Fangming Wang Xiaofei Hu Yuan Yuan Keke Chang Key Laboratory of Marine materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Rare-earth(RE)elements,known as“industrial vitamins”,have permeated modern lives,especially in high-tech *** the RE elements possess close chemical similarities and have been treated as“one element”in the periodic table,their characteristics differ from each *** RE microalloying effect is the crux to ameliorate the physicomechanical and thermochemical properties of materials,thereby the study of RE-related phase diagrams becomes indispensable to the design and optimization of RE-containing ***,in reality,the knowledge base in this area is considerably scarce compared with that of other commonly-used *** this work,the phase equilibria,phase diagrams,phase transformations,and some recent examples of RE-containing materials design are summarized,with which one can predict the RE solubilities,the RE precipitates,as well as the corresponding service *** attainment of enhanced materials’properties suggests that the thermodynamic rules extracted from the phase diagrams could serve as fundamental criteria for the successful development of novel RE-containing materials.

关键词： Rare-earth elements Phase diagrams CALPHAD Phase transformations materials design

Structure and visible photocatalytic activity of nitrogen-doped meso-porous TiO_2 layer on Ti6Al4V substrate by plasma-based ion implantation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 2009年第S3期19卷 665-668页

作者：李金龙马欣新孙明仁李效民宋振纶 School of materials Science and Engineering Harbin Institute of Technology Ningbo Institute of materials Technology and Engineering Chinese Academy of Sciences Shanghai Institute of Ceramics Chinese Academy of Sciences

The nitrogen-doped porous TiO2 layer on Ti6Al4V substrate was fabricated by plasma-based ion implantation of He, O and N. In order to increase the photodegradation efficiency of TiO2 layer, two methods were used in the process by forming mesopores to increase the specific surface area and by nitrogen doping to increase visible light absorption. Importantly, TiO2 formation, porosity architectures and nitrogen doping can be performed by implantation of He, O and N in one step. After implantation, annealing at 650 ℃ leads to a mixing phase of anatase with a little rutile in the implanted layer. By removing the near surface compact layer using argon ion sputtering, the meso-porous structure was exposed on surfaces. Nitrogen doping enlarges the photo-response region of visible light. Moreover, the nitrogen dose of 8×1015 ion/cm2 induces a stronger visible light absorption. The photodegradation of rhodamine B solution with visible light sources indicates that the mesopores on surfaces and nitrogen doping contribute to an apparent increase of photocatalysis efficiency.

关键词： Ti6Al4V alloy TiO2 layer nitrogen doping ion implantation structure photocatalytic activity

Microstructure characteristics of segregation zone in 17-4PH stainless steel piston rod

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2017年第7期24卷 718-723页

作者： Jia-long Tian Wei Wang Wei Yan Zhou-hua Jiang Yi-yin Shan Ke Yang School of materials and Metallurgy Northeastern University Institute of Metal Research Chinese Academy of Sciences Key Laboratory of Nuclear materials and Safety Assessment Institute of Metal ResearchChinese Academy of Sciences

The segregation of Cu and Ni in a 17-4PH stainless steel piston rod has been confirmed to be responsible for the cracking after heat *** investigation showed that the segregation zone was composed of three layers,namely the fine grain martensitic layer,the coarse grain martensitic layer and the coarse grain austenitic layer from the matrix to the crack *** button ingots with the same chemical compositions as those three layers have been prepared to evaluate the grain size distribution,microstructure and mechanical *** effects of Cu and Ni segregation on the microstructures of those three layers have been explored by thermodynamic *** on the microstructure and mechanical properties results,an intensive understanding of the cracking in the segregation zone was therefore reached.

关键词： 17-4PH stainless steel Piston rod Segregation Thermodynamic calculation Crack

Anisotropic Dzyaloshinskii-Moriya interaction protected by D_(2d) crystal symmetry in two-dimensional ternary compounds

在线全文

学校读者我要写书评

暂无评论

npj Computational materials 2022年第1期8卷 1209-1215页

作者： Yonglong Ga Qirui Cui Yingmei Zhu Dongxing Yu Liming Wang Jinghua Liang Hongxin Yang Ningbo Institute of materials Technology and Engineering Chinese Academy of SciencesNingbo315201China Center of materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China

Magnetic skyrmions,topologically protected chiral spin swirling quasiparticles,have attracted great attention in fundamental physics and ***,the discovery of two-dimensional(2D)van der Waals(vdW)magnets have aroused great interest due to their appealing physical ***,both experimental and theoretical works have revealed that isotropic Dzyaloshinskii–Moriya interaction(DMI)can be achieved in 2D magnets or ferromagnet-based ***,2D magnets with anisotropic DMI haven’t been reported ***,via using first-principles calculations,we unveil that anisotropic DMI protected by D_(2d)crystal symmetry can exist in 2D ternary compounds MCuX_(2)(M:3d transition metal(TM),X:group VIA).Interestingly,by using micromagnetic simulations,we demonstrate that ferromagnetic(FM)antiskyrmions,FM bimerons,antiferromagnetic(AFM)antiskyrmions,and AFM bimerons can be realized in the MCuX_(2)*** discovery opens up an avenue to creating antiskyrmions and bimerons with anisotropic DMI protected by D_(2d)crystal symmetry in 2D magnets.

关键词： DMI symmetry magnets

Effect of Re Addition and Withdrawal Rate on the Solidification Behavior of Directionally Solidified Superalloy AM3

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of materials Science & Technology 2011年第2期27卷 101-106页

作者： F.Long Y.S.Yoo S.M.Seo T.Jin Z.Q.Hu C.Y.Jo Institute of Metal Research Chinese Academy of SciencesShenyang 110016China High Temperature materials Laboratory Korea Institute of Materials Sciences66 Sangnam-dongChangwonKyungunamKorea

The influence of Re addition and withdrawal rate on the solidification behavior of the first generation single crystal superalloy AM3 was investigated by directional solidification and quenching *** primary dendrite arm spacing and eutectic volume fraction were measured from directionally solidified superalloy AM3 with different Re *** is found that the primary dendrite arm spacing is determined by the withdrawal rate,and Re does not influence on the *** eutectic fraction increases with increasing Re *** coeffcients of alloying elements were investigated with energy-dispersive X-ray spectrometry（EDS） *** data was submitted to a statistical treatment to establish the solidification path,and the partition coeficients were measured by fitting the curve with a modified Scheil *** is shown that the addition of Re results in bigger microsegregation of alloying elements in directionally solidified AM3 superalloy.

关键词： Superalloy AM3 Re addation Directional solidification