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Review of functionally graded materials processed by additive manufacturing

China Welding 2023年第3期32卷 41-50页

作者：宋学平黄健康樊丁 State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China School of Materials Science and Engineering Lanzhou University of TechnologyLanzhou 730050China School of Mechanical Engineering Lanzhou Petrochemical University of Vocational TechnologyLanzhou 730060China

Additive manufacturing(AM)technology makes parts through layer-by-layer deposition,which can regulate the microstructure and properties of different parts of a single part *** provides a new idea for the preparation of functionally gradient materials(FGM),and has become a research hotspot at *** referring to and analyzing the recent research achievements in the additive manufacturing tech-nology of FGM,the latest research progress at domestic and abroad from four aspects were summaried:selective laser melting additive man-ufacturing,electron beam additive manufacturing,arc additive manufacturing,path planning,and material ***,the existing problems in the research are pointed out,and the future research direction and focus are prospected.

关键词： functionally graded materials additive manufacture research progress

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MnO Stabilized in Carbon-Veiled Multivariate Manganese Oxides as High-Performance Cathode Material for Aqueous Zn-Ion Batteries

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Energy & Environmental materials 2021年第4期4卷 603-610页

作者： Wanwei Jiang Haiting Shi Xijun Xu Jiadong Shen Zhiwei Xu Renzong Hu State Key Laboratory of Separation Membranes and Membrane Processes School of Textile Science and EngineeringTiangong UniversityTianjin 300387China School of Materials Science and Engineering Guangdong Provincial Key Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhou 510640China

Aqueous Zn-ion battery has emerged as one of the most prospective energy storage devices due to its low cost,high safety,and ***,Zn-ion batteries are bottlenecked by significant capacity fading during long-term cycling and poor performance at high current ***,we report an available cooperation of multivariate manganese oxides@carbon hybrids(MnO_(2)/MnO@C and MnO_(2)/Mn_(3)O_(4)@C)via a plasma-assisted design as an attractive Zn-ion *** them,the MnO_(2)/MnO@C cathode exhibits a reversible specific capacity of 165 m Ah g^(-1)over 200 cycles at a high rate of 0.5 A g^(-1),and possesses great rate performance with high capacities of 110 and 100 m Ah g^(-1)at a high rate of 0.8 and 1 A g^(-1),*** good cathode performance significantly results from the facile charge transfer and ions(Zn^(2+)and H^(+))insertion in the manganese oxides/carbon hybrids featuring phase stability behavior in the available cooperation of multivalence and carbon conductive *** work will promote the Zn-manganese dioxide system for the design of low-cost and high-performance aqueous rechargeable Zn-ion batteries.

关键词： aqueous rechargeable Zn batteries conductive substrates multivariate manganese oxides phase stability plasma

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Recently deepened insights regarding Mg corrosion and advanced engineering applications of Mg alloys

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Journal of Magnesium and Alloys 2023年第11期11卷 3948-3991页

作者： Guang-Ling Song Andrej Atrens Department of Ocean Science and Engineering Southern University of Science and Technology1088 Xueyuan BoulevardShenzhen 518055China The University of Queensland School of Mechanical and Mining EngineeringCentre for Advanced Materials Processing and Manufacturing(AMPAM)St LuciaQld 4072 Australia State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen University422 S.Siming RdXiamen 361005China

This review summarizes recent insights into the Mg corrosion mechanism, clarifies many critical controversial points regarding the Mg corrosion behaviour, and updates some efforts made to extend the industrial application of Mg alloys. Based on the new understandings gained so far, future research directions are also suggested in the review. This review has the following logic. The first section "1. Scope"is a consolidation of the new understandings or developments regarding the Mg corrosion mechanism and the new applications for Mg alloys. It also highlights some key points for the review. The second section "2. Widely accepted knowledge" briefly summarizes the general understanding of Mg corrosion gained so far, which acts as the foundation for the following sections. The third section "3. Recently deepened insights" mainly briefs on some new insights into Mg corrosion phenomena based on recent findings. Different interpretations on the corrosion behaviours are comprehensively discussed in the fourth section "4. Controversial points" and the conclusions are drawn in the subsection"4.5 Clarified points". Apart from the fundamental understandings, various efforts in the application of Mg alloys are presented in the fifth section "5. new applications". Following the research tendency as indicated in the review, prioritized research areas are suggested in "*** directions". The review is concluded with "7. Concluding remarks" at last.

关键词： Mg Corrosion Hydrogen Anode Intelligentization

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Stabilizing oxygen vacancies and promoting electrostrain in leadfree potassium niobate-based piezoelectrics over wide temperature ranges

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Journal of advanced Ceramics 2024年第12期13卷 1965-1973页

作者： Bingcheng Luo Wei Feng Suwei Dai Hongzhou Song Yunyi Wu Jie Zhang College of Science China Agricultural UniversityBeijing 100083China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China School of Materials Science and Technology China University of Geosciences BeijingBeijing 100083China Institute of Applied Physics and Computational Mathematics Beijing 100094China Research Center for Comprehensive Energy Technology CTG Science and Technology Research InstituteBeijing 100038China Research Center for Metamaterials Wuzhen LaboratoryJiaxing 314500China

Piezoelectric ceramics provide high strain and large driving forces in actuators.A large electrostrain can be realized by the introduction of point defects such as vacancies,interstitial defects,and substitution *** Mn doping,a significant increase in the reversible electrostrain from 0.05%to 0.17%could be achieved in potassium niobite lead-free piezoelectric *** origins of the large electrostrain were analyzed via in situ X-ray diffraction(XRD)under an electric *** electrostrain and other typical electrical properties of the samples were measured at various temperatures,which enabled the ceramics to perform under a very wide temperature range,such as−80–130℃ for the 0.5 mol%Mn-doped sample with low dielectric loss(≤0.02).More importantly,combined with characterizations of the defect behavior by thermally stimulated depolarization current(TSDC),the failure mechanisms of electrostrain in a hightemperature environment could be revealed,which was associated with synergistic damage to the defects caused by the electric field and high *** results can provide good ideas and a basis for the design of piezoelectric materials with good electrostrain stability over a wide temperature range.

关键词： piezoelectric ceramic lead-free point defect electrostrain thermally stimulated depolarization current(TSDC)

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Transition metal-based cathode catalysts for Li-CO_(2)batteries

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Journal of Energy Chemistry 2025年第5期104卷 225-253页

作者： Wenqing Ma Mingjuan Gao Jianping Ma Siyu Liu Lishan Yang Yahui Yang Xiangping Chen Tianzhen Jian Institute for Advanced Interdisciplinary Research(iAIR) Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of ShandongSchool of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022ShandongChina Key Laboratory of Chemical Biology&Traditional Chinese Medicine Research(Ministry of Education of China) National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of ResourcesKey Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan ProvinceKey Laboratory of Light Energy Conversion Materials of Hunan Province CollegeHunan Normal UniversityChangsha 410081HunanChina Nano-Science Center&Department of Chemistry University of CopenhagenCopenhagen 2100Denmark Jinan Preschool Education College Jinan 250307ShandongChina State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongChina Shandong Sacred Sun Power Sources Co.Ltd. Qufu 273100ShandongChina

The Li-CO_(2)battery has been highly rated as an intriguing technique for balancing the carbon cycle for years,but it is still significantly challenged by the obstacles such as limited reversibility,sluggish kinetics,and poor energy ***,the design and development of advance catalysts that can enhance the kinetics and reversibility of the CO_(2)electrochemical cycling reactions are considered the imperative *** metal-based catalysts are widely considered appealing owing to their unfilled dorbitals,rich and adjustable valences,as well as *** this review,the working mechanism and the key issues of the CO_(2)electrochemical cycling reaction are discussed *** the strategies for composition and structure design of different type of transition metal-based catalysts are highlighted,including their benefits,limitations,and the ways to implement these ***,based on the pioneering research,the perspectives on the challenges and key points for the future development of cathode catalyst are proposed.

关键词： Li-CO_(2)battery Transition metal Cathode catalyst Catalytic mechanism

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Epitaxial interface stabilizing iridium dioxide toward the oxygen evolution reaction under high working potentials

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Nano Research 2023年第4期16卷 4767-4774页

作者： Guoqiang Zhao Zhouxin Luo Baohua Zhang Yaping Chen Xiangzhi Cui Jian Chen Yongfeng Liu Mingxia Gao Hongge Pan Wenping Sun School of Materials Science and Engineering Zhejiang UniversityHangzhou 310058China State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China Institute of Science and Technology for New Energy Xi'an Technological UniversityXi'an 710021China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China

Proton exchange membrane water electrolyzer(PEMWE)driven by renewable electricity is a promising technique toward green hydrogen production,but the corrosive environment and high working potential pose severe challenges for developing advanced electrocatalysts for the oxygen evolution reaction(OER).Although Ir-based materials possess relatively balanced activity and stability for the OER,their dissolution behavior cannot be neglected,in particular under high working *** this work,iridium dioxide(IrO_(2))nanoparticles(NPs)were anchored on the surface of exfoliated h-boron nitride(BN)nanosheets(NSs)toward the OER reaction in acid *** active Ir(V)species were stabilized by the epitaxial interface between IrO_(2)and h-BN,and therefore the IrO_(2)/BN delivered stable performance at increased working potentials,while the activity of bare IrO_(2)NPs without h-BN support decreased ***,the smaller lattice spacing of h-BN induced compressive strain for IrO_(2),resulting in improved *** results demonstrate the feasibility of stabilizing highly active Ir(V)species for the OER in acid media by constructing robust interface and provide new possibilities toward designing advanced heterostructured electrocatalysts.

关键词： iridium oxide oxygen evolution reaction epitaxial interface electrochemical stability

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Room-temperature thermoelectric materials: Challenges and a new paradigm

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Journal of Materiomics 2022年第2期8卷 427-436页

作者： Zhijia Han Jing-Wei Li Feng Jiang Jiating Xia Bo-Ping Zhang Jing-Feng Li Weishu Liu The Beijing Municipal Key Laboratory of New Energy Materials and Technologies School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices Southern University of Science and TechnologyShenzhenGuangdong518055China

Room-temperature thermoelectric materials provide promising solutions for energy harvesting from the environment,and deliver a maintenance-free power supply for the internet-of-things(IoTs).The currently available Bi_(2)Te_(3) family discovered in the 1950s,still dominates industrial applications,however,it has serious disadvantages of brittleness and the resource shortage of tellurium(1×10^(-3) ppm in the earth's crust).The novel Mg_(3)Sb_(2) family has received increasing attention as a promising alternative for room-temperature thermoelectric *** this review,the development timeline and fabrication strategies of the Mg 3 Sb 2 family are ***,an insightful comparison between the crystal-linity and band structures of Mg_(3)Sb_(2) and Bi_(2)Te_(3) is *** outlook is presented to discuss challenges and new paradigms in designing room-temperature thermoelectric materials.

关键词： Thermoelectric materials Mg_(3)Sb_(2) Bi_(2)Te_(3) Chemical bond engineering

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Achieving excellent energy storage reliability and endurance via mechanical performance optimization strategy in engineered ceramics with core-shell grain structure

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Journal of Materiomics 2022年第3期8卷 601-610页

作者： Yu Huan Xiaozhi Wang Yingming Zheng Xinjian Wang Tao Wei Jun Ouyang Xiaohui Wang School of Material Science and Engineering University of JinanJinan250022China Institute of Advanced Energy Materials and Chemistry Shandong Provincial Key Laboratory of Molecular EngineeringSchool of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)JinanChina State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

Although dielectric ceramic capacitors possess attractive properties for high-power energy storage,their pronounced electrostriction effect and high brittleness are conducive to easy initiation and propagation of cracks that significantly deteriorate electrical reliability and lifetime of capacitors in practical ***,a new strategy for designing relaxor ferroelectric ceramics with K_(0.5)Na_(0.5)NbO_(3)-core/SiO_(2)-shell structured grains was proposed to simultaneously reduce the electric-field-induced strain and enhance the mechanical strength of the *** simulation and experiment declared that the bending strength and compression strength of the core-shell structured ceramic were shown to increase by more than 50% over those of the uncoated ***,the electric-field-induced strain was reduced by almost half after adding the SiO_(2) *** suppressed electrical deformation and enhanced mechanical strength could alleviate the probability of generation of cracks and prevent their propagation,thus remarkably improving breakdown strength and fatigue endurance of the *** a result,an ultra-high breakdown strength of 425 kV cm^(-1) and excellent recoverable energy storage density(Wrec~4.64 J cm^(-3))were achieved in the core-shell structured *** importantly,the unique structure could enhance the cycling stability of the ceramic(Wrec variation<±2% after 105 cycles).Thus,mechanical performance optimization via grain structure engineering offers a new paradigm for improving electrical breakdown strength and fatigue endurance of dielectric ceramic capacitors.

关键词： Lead-free dielectric ceramic capacitors Local grain structure design Mechanical performance Electrical reliability Fatigue endurance

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Effect of styrene-acrylic emulsion on crack resistance of cement-based materials 2nd

Effect of styrene-acrylic emulsion on crack resistance of ce...

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2nd Conference on Research and Application of advanced Cementitious materials and advanced materials Forum, CRAACM and AMF 2020

作者： Mei, Junpeng Li, Hainan Xu, Zhidong School of Urban Construction Wuhan University of Science and Technology Wuhan430081 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

ISBN: (纸本)9783035718119

In this paper, the brittleness coefficient, elastic modulus-to-strength ratio, drying shrinkage and autogenous shrinkage and cracking sensitivity were used to investigate the effect of styrene-acrylic emulsion (SAE) on crack resistance of cement-based materials under ultralow water binder ratio (0.22). Then the pore structures, hydration products and surface morphology were also studied to explore the mechanism of SAE on improving the crack resistance of cement-based materials. Results show that, the addition of SAE significantly reduces the elastic modulus, brittleness coefficient, elastic strength ratio, drying shrinkage and autogenous shrinkage of the specimen. The cracking susceptibility is also decreased by the incorporation of SAE and when the dosage of SAE was 5%, the initial cracking time would be extended by 43 hours. In addition, incorporation of SAE can reduce the amount of pores that have an adverse effect on shrinkage, refine the microstructure and decrease the calcium hydroxide formation and microcracks of cement-based materials. Such results would be expected to provide guidance on enhancing the anti-cracking ability of high-performance cementitious materials by the dosage of SAE under low water-binder ratio in practical engineering. © 2021 Trans Tech Publications Ltd, Switzerland.

关键词： Lime

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Ionic Conductive Hydrogel with High Tensile Strength, Low Hysteresis, High Adhesivity and Frost Resistance Based on Confinement Effect and Free of Chemical Crosslinker

SSRN

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SSRN 2024年

作者： Hu, Mingqiang Ye, Dezhan Qian, Xing Zhan, Yanhu Jiang, Xiancai School of Chemical Engineering Fuzhou University Fuzhou350108 China State Key Laboratory of New Textile Materials & Advanced Processing Technologies Wuhan Textile University Wuhan430200 China School of Materials Science and Engineering Liaocheng University Liaocheng252000 China

Traditional ionic conductive hydrogel is prepared by chemically crosslinking the polymer chanins to form network. However, the chemically crosslinked ionic conductive hydrogel usually showed limited elongation at break and high hysteresis during stretching process. Here, a simple strategy of synthesizing ionic conductive hydrogel without crosslinking agent was purposed. Hydrophilic salt in the ionic conductive hydrogel not only act as the ion supplier, but also provide the spatial confinement effect to form the completely physically crosslinked hydrogel. Firstly, CaCl2 was used as the representative salt. The optimal PVA/PAM/CaCl2 ionic conductive hydrogel (PPC), showed excellent tensile performance (2400.3±140.63%), anti-freezing performance (-28.8 oC), high conductivity (4.8±0.01 S/m), excellent stability in room temperature, low hysteresis, and high transparency. The conductivity of PPC showed no sensitivity to the tensile strain..This innovative combination enables PPC ionic conductive hydrogel to have extraordinary versatility. The flexible all-solid-state supercapacitor assembled with PPC ionic conductive hydrogel as the electrolyte has a high area specific capacitance (136.9 mF/cm2). The prepared supercapacitor can maintain good stability under certain tensile deformation (The capacitance retention rate was 87.7% when stretched at 200%). Moreover, other high hydrophilic salts including LiCl, ZnCl2, MgCl2 and AlCl3 were used to prepare ionic conductive PVA/PAM hydrogel to verify the universality of this preparation method. © 2024, The Authors. All rights reserved.

关键词： Aluminum chloride

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