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Dependence of Plastic Stability on 3D interface Layer in Nanolaminated Materials

Acta Metallurgica Sinica(English Letters) 2022年第11期35卷 1759-1764页

作者： Shuimiao Jiang Lichen Bai Qi An Zhe Yan Weiming Li Kaisheng Ming Shijian Zheng Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei Universityof TechnologyTianjin 300130China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of TechnologyTianjin 300130China

The nanolaminated materials generally exhibit poor plasticity due to the fast onset of shear *** interface structure is an eff ective approach for enhancing plasticity via postponing or suppressing the shear ***,we introduce 4 nm thick CuNb 3D amorphous interface layers and Nb 3D crystalline interface layers in Cu nanolaminated materials,*** situ micro-pillar compression tests show that samples with crystalline interface layers exhibit shear instability,while the samples with amorphous interface layers display uniform *** the plastic deformation of the singlecrystal crystalline interface layer is anisotropic,except for well-aligned slip systems,dislocations on other slip systems have a poor ability to transmit the 3D crystalline interface layer,leading to localized dislocations pileups and shear *** contrast,the amorphous interface layer which is plastically isotropic accommodates dislocations from arbitrary slip systems of the matrix,which can alleviate the stress concentrations at the interface,and thus suppresses the shear instability.

关键词： Multilayers interface Plastic deformation Dislocation Amorphous interface

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Interfacial reaction between AZ91D magnesium alloy melt and mild steel under high temperature

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China Foundry 2024年第2期21卷 159-167页

作者： Jia-hong Dai Jian-yue Zhang Bin Jiang Xiang-jun Xu Zhong-tao Jiang Hong-mei Xie Qing-shan Yang Guo-qing Zhang College of Materials Science and Engineering Yangtze Normal UniversityChongqing 408100China National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China Chongqing Jiulongyuan High-tech Industry Group Co. Ltd.Chongqing 400080China Loncin Industry Co. Ltd.Chongqing 400080China Department of Materials Science and Engineering The Ohio State UniversityColumbusOH 43210USA Chongqing Key Laboratory of Materials Surface&Interface Science Chongqing University of Arts and SciencesChongqing 402160China School of Metallurgy and Material Engineering Chongqing University of Science and TechnologyChongqing 401331China

The metallurgical quality control of magnesium(Mg)and Mg alloys in melting process is required to ensure a satisfied mechanical and corrosion performance,while the typical used steel crucible introduces impurities and interfacial interaction during melting ***,a systematic study about impurities diffusion and interfacial interaction between molten Mg and steel is *** the present study,the interfacial reaction between molten AZ91D Mg alloy and mild steel during melting process was investigated with the melting temperatures of 700℃,750℃ and 800℃.The results show that Al(Fe,Mn)intermetallic layer is the intermetallic primarily formed at the interfaces of AZ91D melt and mild ***,Al_(8)(Mn,Fe)5is indexed between Al(Fe,Mn)and ***_(3)C appears between the mild steel and Al(Fe,Mn)at 700℃ and 750℃,but absent at 800℃ due to the increased solubility of carbon in Mg *** is found that the growth of the intermetallic layer is controlled by diffusion mechanism,and Al and Mn are the dominant diffusing species in the whole interfacial reaction *** measuring the thickness of different layers,the growth constant was *** increases from 1.89(±0.03)×10^(-12)m^(2)·s^(-1)at 700℃ to 3.05(±0.05)×10^(-12)m^(2)·s^(-1)at 750℃,and 5.18(±0.05)×10^(-12)m^(2)·s^(-1)at 800℃.Meanwhile,the content of Fe is linearly increased in AZ91D with the increase of holding time at 700℃ and 750℃,while it shows a significantly increment after holding for 8 h at 800℃,indicating holding temperature is more crucial to determine the Fe content of AZ91D than holding time.

关键词： AZ91D mild steel interface reaction intermetallic growth kinetics

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Ultrathin Zn-free anode based on Ti_(3)C_(2)T_(x) and nanocellulose enabling high-durability aqueous hybrid Zn-Na battery with Zn2+/Na+co-intercalation mechanism

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Nano Research 2023年第1期16卷 536-544页

作者： Hao Chen Weijun Zhou Minfeng Chen Qinghua Tian Xiang Han Jizhang Chen College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China Key Laboratory of Surface&Interface Science of Polymer Materials of Zhejiang Province Department of ChemistryZhejiang Sci-Tech UniversityHangzhou 310018China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing 210037China

With low cost and high safety,aqueous zinc-based batteries have received considerable ***,the excess utilization of zinc metal in the anodes of these batteries reduces energy density and increases ***,an ultrathin electrode of approximately 6.2μm thick is constructed by coating Ti_(3)C_(2)T_(x)/nanocellulose hybrid onto a stainless steel *** electrode is used as the Zn-free anode for aqueous hybrid Zn-Na battery,in which,a concentrated electrolyte is used to improve electrochemical *** Ti_(3)C_(2)T_(x)/nanocellulose coating is found to improve the electrolyte wettability,facilitate desolvation process of hydrated Zn^(2+) ions,lower nucleation overpotential,improve zinc plating kinetics,guide horizontal zinc plating along the Zn(002)facet,and inhibit parasitic side *** is also found that the Na_(3)V_(2)(PO_(4))_(3) cathode material adopts a highly reversible Zn^(2+)/Na^(+)co-intercalation charge storage mechanism in this *** to these benefits,the assembled hybrid Zn-Na battery exhibits excellent rate capability,superior cyclability,and good anti-freezing *** work provides a new concept of electrode design for electrochemical energy storage.

关键词： MXene-based composites ultrathin electrodes electrode surface coatings aqueous hybrid batteries co-intercalation charge storage mechanisms

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Synthesis of FeOOH scaly hollow tubes based on Cu_(2)O wire templates toward high-efficiency oxygen evolution reaction

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Rare Metals 2023年第6期42卷 1836-1846页

作者： Yu Zhang Xue-Ai Teng Ze-Qun Ma Rong-Ming Wang Woon-Ming Lau Ai-Xian Shan Beijing Advanced Innovation Center for Materials Genome Engineering and Center for Green Innovation School of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing100083China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface ScienceSchool of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing100083China Shunde Innovation School of University of Science and Technology Beijing Foshan528000China Institute of Materials Science and Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou215009China

For catalytic materials,the characteristics of one-dimension and hollowness are the promotion factors for their full presentation of catalytic activity,and through a template-as sis ted method,both above superiorities can be fused ***,we proposed a novel strategy inspired by Pearson's principle with Cu_(2)O wires as templates,and prepared FeOOH hollow tubes,which covered by FeOOH *** applied as oxygen evolution reaction(OER)catalyst,the FeOOH scaly hollow tubes(FeOOH SHTs)showed outstanding catalytic activity with a low overpotential of 245 mV to drive a current density of10 mA·cm^(-2),excellent kinetics manifesting as a low Tafel slope of 46.9 mV·dec^(-1),and robust *** work provides a new synthesis strategy for an ideal OER catalyst,FeOOH,with high inherent activity and enhances the feasibility to broaden the design ideas of transition metalbased catalysts.

关键词： FeOOH scaly hollow tube(SHT) Cu_(2)O wire template One-dimensional(1D)hollow structure Oxygen evolution reaction(OER)

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Kernels-Different Au_(25) Nanoclusters Enhanced Catalytic Performance via Modification of Ligand and Electronic Effects

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Chinese Journal of Chemistry 2022年第21期40卷 2575-2581页

作者： Mei Qu Fang Xue Jiang-Yu Wei Miao-Miao Qiao Wei-Qi Ren Shi-Li Li Xian-Ming Zhang Key Laboratory of Magnetic Molecules and Magnetic Information of Ministry of Education School of Chemistry and Material ScienceShanxi Normal UniversityTaiyuanShanxi 030006China College of Chemistry Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of EducationTaiyuan Universityof TechnologyTaiyuanShanxi 030024China

Ultrasmall atomically precise thiolate-protected gold nanoclusters with surface open sites are crucial for practical applications in ***,there is a lack of systematic studies that unify the kernels-isomerization,modification of peripheral ligands and electronic effects into one system,as well as their correlation to catalytic *** this work,three structurally related Au_(25)nanoclusters with reported star Au_(25) kernels,Au_(25)-i-FTP,Au_(25)-bi-FTP,and Au_(25)-bi-CHT have been synthesized through two different methods:one-pot direct reduction and two-step reduction by using AsPh3 as *** structures and catalytic performance have been comparatively ***_(25)-i-FTP has a classic Au13 core capped by six dimeric RS-Au-SR-Au-SRs,while Au_(25)-bi-FTP and Au_(25)-bi-CHT feature typical rod-shaped biicosahedral geometric *** of the three Au_(25) clusters were effective catalysts for oxidation of organosilanes,different from conclusions obtained in ***,the nanorod-type Au_(25)-bi-CHT clusters protected by flexible thiol ligands showed very good catalytic performance in this reaction,the conversion and selectivity were close to 100%within 5 *** ligand rigidity and electron effects work together to modulate the catalytic *** findings inspire us to rethink kernel and ligand effects on catalytic property,and the principle demonstrated here will possibly be widely-used in high active atom-precise catalysts.

关键词： Gold Nanocluster Atom-Precise Catalysis Silanols

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Surface Reconstruction-Induced Photocatalytic Methanol Reduction Reaction on a Rutile TiO₂(001) Surface

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Journal of Physical Chemistry Letters 2024年第33期15卷 8481-8486页

作者： Wu, Longxia Wu, Zongfang Li, Fei Wang, Zhengming Zhang, Zhen Gong, Xue-Qing Huang, Weixin Key Laboratory of Precision and Intelligent Chemistry iChEM Key Laboratory of Surface and Interface Chemistry Energy Catalysis of Anhui Higher Education Institutes School of Chemistry and Materials Science University of Science and Technology of China Core Facility of Wuhan University Wuhan University Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of China School of Environmental Science and Engineering Shaanxi University of Science and Technology School of Chemistry and Chemical Engineering Shanghai Jiao Tong University

Photochemistry of methanol on TiO2 surfaces is of great importance both fundamentally and industrially. Methanol was previously reported only to occur photogenerated hole-participating oxidation reactions on TiO2 surf...

Photochemistry of methanol on TiO₂ surfaces is of great importance both fundamentally and industrially. Methanol was previously reported only to occur photogenerated hole-participating oxidation reactions on TiO₂ surfaces. Herein, we report that, upon UV light illumination, the methoxy species formed by methanol dissociation at the 5-fold coordinated Ti⁴⁺ sites (CH₃O(a)_Ti5c) of a reconstructed rutile TiO₂(001)-(1 × 1) surface also undergoes the C-O bond cleavage into methyl fragments mediated by photogenerated electrons, in addition to the well-established photogenerated hole-participating oxidation reactions. Upon subsequent heating, the resulting methyl species undergoes hydrogenation and coupling reactions into methane and ethane, respectively. Accompanying theoretical calculations showed that the lowest unoccupied molecular orbital (LUMO) of CH₃O(a)_Ti5c is localized almost at the conduction band minimum of the CH₃O-adsorbed reconstructed rutile TiO₂(001)-(1 × 1) surface, indicating the likely TiO₂ → CH₃O(a)_Ti5c interfacial photoexcited-electron transfer. These results greatly broaden the photochemistry of methanol on TiO₂ surfaces and demonstrate a photocatalytic methanol-to-hydrocarbon reaction route. © 2024 American Chemical Society.

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Visual cognition of birds and its underlying neural mechanism:A review

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Avian Research 2022年第2期13卷 216-225页

作者： Xiaoke Niu Zhenyang Jiang Yanyan Peng Shuman Huang Zhizhong Wang Li Shi Henan Key Laboratory of Brain Science and Brain-Computer Interface Technology School of Electrical EngineeringZhengzhou UniversityZhengzhou450001China Department of Automation Tsinghua UniversityBeijing100084China

Birds have acute vision and many remarkable visual cognition abilities,due to their unique living *** underlying neural mechanisms have also attracted interests of researchers in ***,we firstly summarize the visual cognition abilities of birds,and make a comparison with ***,the underlying neural mechanisms are presented,including histological structure of avian brain and visual pathways,typical experimental results and conclusions in electrochemistry and *** latter mainly focuses on several higher brain areas related to visual cognition,including mesopallium ventrolaterale,entopallium,visual Wulst,and nidopallium ***,we make a conclusion and provide a suggestion about future studies on revealing the neural mechanisms of avian visual *** review presents a detailed understanding of avian visual cognition and would be helpful in ornithology studies in the field of cognitive neuroscience.

关键词： Avian Electrophysiology Neural mechanism Visual cognition

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Phase-Field Modelling of Void Evolution in Binary Alloys Under Irradiation

Phase-Field Modelling of Void Evolution in Binary Alloys Und...

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International Conference on Water Reactor Fuel Performance Meeting, WRFPM 2023

作者： Lu, Yong Yang, Yuhang Li, Wenjie Sun, Dan Liu, Xingjun Wang, Cuiping College of Materials and Fujian Key Laboratory of Surface and Interface Engineering for High Performance Materials Fujian Xiamen China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Sichuan Chengdu China

ISBN: (纸本)9789819971565

The formation and growth of voids have significant influence on the dimensional changes of nuclear materials subjected to irradiation. In this paper, we developed a phase-field model to investigate the evolution of voids in binary alloys under irradiation, which includes the process of irradiation-induced defect formation and annihilation. The relationship of alloy composition and defect formation energy was determined. The nucleation and growth of voids for various alloy compositions were simulated to investigate the effect of solute composition on the void growth kinetics. Our simulation results indicate that, the composition of matrix phase and its influence on the formation energy of vacancy are essential for the growth kinetics and void distribution during irradiation. As an example, the void nucleation and growth in U-Zr alloys are also studied and consistence between the present results and experimental observations were obtained. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2024.

关键词： Binary alloys

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Composition design of high yield strength points in single-phase Co-Cr-Fe-Ni-Mo multi-principal element alloys system based on electronegativity,thermodynamic calculations,and machine learning

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Tungsten 2023年第1期5卷 169-178页

作者： Jiao-Hui Yan Zi-Jing Song Wei Fang Xin-Bo He Ruo-Bin Chang Shao-Wu Huang Jia-Xin Huang Hao-Yang Yu Fu-Xing Yin Research Institute for Energy Equipment Materials School of Materials Science and EngineeringHebei University of TechnologyTianjin 300132China Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology Tianjin 300132China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China

A method which combines electronegativity difference,CALculation of PHAse Diagrams(CALPHAD) and machine learning has been proposed to efficiently screen the high yield strength regions in Co-Cr-Fe-Ni-Mo multi-component phase ***,the single-phase region at a certain annealing temperature is obtained by combining CALPHAD method and machine learning,to avoid the formation of brittle *** high yield strength points in the single-phase region are selected by electronegativity *** yield strength and plastic deformation behavior of the designed Co_(14)Cr_(30)Ni_(50)Mo_(6)alloy are measured to evaluate the proposed *** validation experiments indicate this method is effective to predict high yield strength points in the whole compositional ***,the interactions between the high density of shear bands and dislocations contribute to the high ductility and good work hardening ability of Co_(14)Cr_(30)Ni_(50)Mo_(6)*** method is helpful and instructive to property-oriented compositional design for multi-principal element alloys.

关键词： High entropy alloys Multi-principal element alloys Yield strength Electronegativity difference CALculation of PHAse Diagrams Machine learning

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Realization of solid-state red fluorescence and concentration-induced multicolor emission from N,B co-doped carbon dots

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Frontiers of Materials science 2023年第2期17卷 121-132页

作者： Junli Wang Jingxia Zheng Pinyi He Qiang Li Yongzhen Yang Xuguang Liu Juanzhi Yan Yi Zhang Department of Materials and Chemical Engineering Taiyuan UniversityTaiyuan 030032China Key Laboratory of Interface Science and Engineering in Advanced Materials(Ministry of Education) Taiyuan University of TechnologyTaiyuan 030024China School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China Department of Chemistry and Chemical Engineering Lyuliang UniversityLyuliang 033001China

As a new type of luminescent material,carbon dots(CDs)have attracted increased attention for their superior optical properties in recent ***,solidstate fluorescent CDs,especially with red emission,are still a major ***,CDs with solid-state red emission were synthesized by co-doping of N and B using the one-step microwave *** CD powder exhibits excitation-independent solid-state red fluorescence without any dispersion matrices,with optimum solid-state fluorescence wavelength of 623 *** hydrogen bonding interaction in CDs is helpful for solid-state fluorescence of *** IG/ID value of CDs reaches up to 3.49,suggesting their very high graphitization degree,which is responsible for their red *** addition,CDs show the concentration-induced multicolor emission,which is attributed to the decreased energy gap in the high concentrated CD *** exploit their concentration-dependent emission,CDs with changing ratio in matrices are applied as a color-converting layer on ultraviolet chip to fabricate multicolor light-emitting diodes with light coordinates of(0.33,0.38),(0.41,0.48),(0.49,0.44),and(0.67,0.33),which belong to green,yellow,orange,and red light,respectively.

关键词： carbon dot solid-state red fluorescence concentration-induced multicolor emission N,B co-doping

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