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Elinvar-Like Effect Induced by High Lattice Distortion in Zr_(6)Ta_(2)O_(17) Ceramics

Research 2025年第1期2024卷 885-898页

作者： Xiaopeng Hu Qing Liu Sai Liu Yu Zou Jinwei Guo Junyao Wu Wang Zhu Zengsheng Ma Key Laboratory of Key Film Materials&Application for Equipment(Hunan province) School of Materials Science and EngineeringXiangtan UniversityXiangtanHunan 411105China Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education School of Materials Science and EngineeringXiangtan UniversityXiangtanHunan 411105China

Super strength and toughness,excellent deformation resistance,and high-temperature service performance are the key factors to determine the practical application of new thermal barrier coatings(TBCs).The limited mobility of dislocations and the internal inherent defects in ceramics will inevitably lead to the decline of strength–plasticity and the reduction of service *** preexisting twin boundaries and stacking faults(SFs)or preparing ceramic materials with high configuration entropy has demonstrated to be an effective strategy for enhancing the mechanical properties of ***,due to the positive thermal expansion coefficient of most ceramics and the remarkable increase of structural disorder at elevated temperature,the problem of elastic softening has become a bottleneck restricting the high-temperature service life of new *** this paper,the deformation behavior of high configuration entropy Zr6Ta2O17 ceramics at 25 to 1,200°C was in situ monitored via digital image correlation technique and three-point bending test platform in high-temperature environment.A remarkable Elinvar-like effect appears in the Zr_(6)Ta_(2)O_(17) *** interestingly,mechanical deformation dominates the severe lattice distortion(deformation twins,SFs)and the disorder–order transition of chemical order at the atomic scale,while temperature can further enhance the degree of lattice distortion and ordering of Zr6Ta2O17 ***,the atomic fluctuations at high temperature promotes the comprehensive improvement of mechanical properties in the Zr6Ta2O17 ceramics.

关键词： elinvar effect decline strength plasticity temperature induced lattice distortion thermal barrier coatings tbcs Zr Ta O ceramics high configuration entropy deformation twins mechanical properties

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Difunctional undulating interface optimizes the structure-comprehensive properties of graphene/CuNb composite with analogy-bicontinuous structure

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Journal of materials science & Technology 2024年第28期195卷 227-233页

作者： Siyuan Guo Xiang Zhang Chunsheng Shi Dongdong Zhao Chunnian He Naiqin Zhao School of Materials Science and Engineering and Tianjin Key Laboratory of Composite and Functional Materials Tianjin UniversityTianjin 300350China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin UniversityTianjin 300350China

*** To mitigate the distressing problem of mutual exclusion between mechanical properties-electrical conductivity(EC)in Cu alloy and meet the multiple requirements on properties,suitable ad-ditive phases with combined extraordinary performance have commonly been utilized to endow Cu matrix composites with comprehensive properties[1-4].Promoting dislocation-phase boundary interactions and interfacial bonding enables markedly altering the strength of composites through phase boundary strengthening and loading transfer.

关键词： composites composite structure

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Modulation of oxygen vacancies and hot electrons promotes highly efficient CO_(2) photoreduction towards C_(2)H_(6)

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Nano Research 2025年第4期18卷 90-97页

作者： Chengyang Zhu Hengming Huang Huiling Hu Jiaojiao Fang Junjie Mao Key Laboratory of Functional Molecular Solids Ministry of EducationCollege of Chemistry and Materials ScienceAnhui Normal UniversityWuhu 241002China College of Materials Science and Engineering State Key Laboratory of Materials-Orient Chemical EngineeringJiangsu Collaborative Innovation Center for Advanced Inorganic Function CompositesJiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing Tech UniversityNanjing 210009China

Efficient CO_(2) photoreduction towards C_(2+)solar fuels has emerged as one of the most promising strategies for alleviating the current energy and environment ***,the C-C coupling barriers and complex multi-electron transfer steps still limit the activity and selectivity of CO_(2)-to-C_(2) ***,Au nanoparticles(NPs)modified CeO_(2) with oxygen vacancies(Au/CeO_(2)-VO)were reported for enhancing the CO_(2)-to-C_(2)H_(6) photoreduction ***/CeO_(2)-VO achieved the high C_(2)H_(6) activity of 51.7μmol·g^(-1)·h^(-1),accompanied with C_(2)H_(6) selectivity up to 80% in the absence of sacrificial *** results combined with theoretical simulation indicated that VO strengthened CO_(2) adsorption and activated*CO production,and plasmon-induced hot electrons from Au NPs to CeO_(2)-VO facilitated the*CO-*CO *** synergistic modulation of VO and hot electrons further decreased the energy barriers of C-C coupling and subsequent hydrogenation,resulting in the superior photoreduction *** work opens an avenue of developing plasmonic photocatalysts for multi-carbon products from CO_(2) photoreduction.

关键词： synergistic modulation oxygen vacancy hot electrons CO_(2)photoreduction C_(2)H_(6)

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Novel titanium vanadate with superior Na^(+) transport kinetics for rapid charging and low-temperature sodium ion batteries

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Green Energy & Environment 2025年第2期10卷 374-381页

作者： Dan Lv Liehao Wei Cheng Wang Mingyue Wang Zhongchao Bai Yameng Fan Dongdong Wang Nana Wang Jian Yang Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) School of Materials Science and EngineeringTianjin UniversityTianjin300072China Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJinan250100China Tianjin Key Lab of Indoor Air Environmental Quality Control School of Environmental Science and TechnologyTianjin UniversityTianjin300072China Institute for Superconducting and Electronic Materials University of WollongongWollongongAustralia Institute of Energy Materials Science(IEMS) University of Shanghai for Science and Technology516 Jungong RoadShanghai200093China

Sodium-ion batteries(SIBs)hold great promise for large-scale energy storage in the post-lithium-ion battery era due to their high rate performance and long lifespan,although their sluggish Na^(+) transformation kinetics still require *** by the excellent electrochemical performance of titanium-based anode materials,here,we present a novel titanium vanadate@carbon(TVO@C)material as anode for *** TVO@C material is synthesized via a facile coprecipitation method,with the following annealing process in an acetylene *** opened ion channel and the oxygen vacancies within TVO@C facilitate the diffusion of Na^(+) ions,reducing their diffusion ***,an ultrahigh rate of 100 A g^(-1)and long life of 10,000 cycles have been ***,the TVO@C electrode exhibits stable performance,not only at room temperature,but also at temperatures as low as 20 *** TVO@CjjNa_(3)V_(2)(PO_(4))_(3)@C full cells have also achieved stable discharge/charge for 500 *** is believed that this strategy provides new insight into the development of advanced electrodes and provides a new opportunity for constructing novel high rate electrodes.

关键词： Anode High rate Titanium vanadate Sodium ion batteries

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Microstructure and mechanical properties of Cr films deposited with different peak powers by high-power impulse magnetron sputtering

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Rare Metals 2023年第1期42卷 327-335页

作者： Yu Wang Bao-Hua Wu Fan Jiang Dong-Lin Ma Yan Yu Hong Sun Nan Huang Yong-Xiang Leng Key Laboratory for Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu610031China National Key Laboratory for Surface Physics and Chemistry Mianyang621907China

For high-power impulse magnetron sputtering(HIPIMS),the peak power applied to the target is of great importance for regulating the ionization degree of the metal target and ion/atom flux *** this work,chromium(Cr)films were deposited on 316-L stainless steel substrates and silicon(100) wafers with different peak powers by *** relationship between peak target power and properties of Cr films was explored in *** resulting structure and mechanical properties of deposited Cr films were characterized by X-ray diffraction(XRD),transmission electron microscope(TEM),atomic force microscopy(AFM),indentation hardness and scratch *** results indicate that the ionization degree of metal target and ion/atom flux ratio increase with the increase in peak power but without the loss of deposition rate at the same *** low ionization degree,the deposited Cr film has low compressive residual stress and low hardness but good adhesion *** the ionization degree of target metal increases with increasing peak power,Cr film exhibits finer size and smoother surface with improved hardness but decreased adhesion strength.

关键词： Cr film HIPIMS Peak power Ionization degree Ion/atom ratio Mechanical properties

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Effect of Ca Micro-Alloying on the Microstructure and Anti-Corrosion Property of Mg0.5Zn0.2Ge Alloy

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1147-1160页

作者： Bishan Cheng Depeng Li Baikang Xing Ruiqing Hou Pingli Jiang Shijie Zhu Shaokang Guan School of Materials Science and Engineering and Henan Key Laboratory of Advanced Magnesium Alloys Zhengzhou UniversityZhengzhou450001China Center of Advanced Analysis and Gene Sequencing Zhengzhou UniversityZhengzhou450001China Key Laboratory of Materials Processing and Mold Technology Ministry of EducationZhengzhou450002China

Magnesium and its alloys have attracting rising attention as one of biodegradable metallic ***,the rapid corrosion and severe localized corrosion still hinder their extensive applications in *** this study,micro-alloying of Ca(≤0.1 wt%)into Mg0.5Zn0.2Ge alloy developed in our previous work was explored to further enhance the corrosion resistance and alleviate the localized corrosion of the *** results reveal that the addition of Ca leads to the transformation of the cathodic Mg_(2)Ge phase in Mg0.5Zn0.2Ca alloy into anodic MgCaGe phase in Ca-containing alloys,thereby changing the galvanic couples in alloys during *** preferential dissolution of MgCaGe phase promotes the participation of Ca and Ge into the formation of corrosion products,resulting in the enrichment of Ca and Ge in the outmost of corrosion product layer,which stabilizes and passivates the corrosion product layer on Mg alloy ***,the enrichment of Zn at the corrosion interface seems to further hinder the corrosion of Mg *** of these factors confer a slower and more uniform corrosion on Mg0.5Zn0.2GexCa(x<0.1 wt%)alloy,which provides favorable candidates for the further processing to gain suitable biodegradable Mg alloys.

关键词： Magnesium alloy Micro-alloying Calcium Corrosion resistance

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Design of pH-universal electrocatalysts for hydrogenevolution reaction

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Carbon Energy 2024年第11期6卷 27-58页

作者： Jingwen Lin Xu Wang Zhenyun Zhao Dongliang Chen Rumin Liu Zhizhen Ye Bin Lu Yang Hou Jianguo Lu State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang UniversityHangzhouChina Institute of Wenzhou Zhejiang UniversityWenzhouChina Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological Engineering Zhejiang UniversityHangzhouChina

The path to searching for sustainable energy has never stopped since thedepletion of fossil fuels can lead to serious environmental pollution andenergy *** water electrolysis to produce hydrogen has beenproven to be a prioritized approach for green resource *** is highlycrucial to explore inexpensive and high-performance electrocatalysts foraccelerating hydrogen evolution reaction(HER)and apply them to industrialcases on a large ***,we summarize the different mechanisms of HERin different pH settings and review recent advances in ***,based on the previous efforts,we discuss severaluniversal strategies for designing pH-independent catalysts and showdirections for the future design of pH-universal catalysts.

关键词： design strategy hydrogen evolution reaction pH-universal electrocatalysts

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Work-function effect of Ti_(3)C_(2)/Fe-N-C inducing solid electrolyte interphase evolution for ultra-stable sodium storage

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Nano Research 2024年第8期17卷 7163-7173页

作者： Huicong Xia Lingxing Zan Hongliang Dong Yifan Wei Yue Yu Jinfu Shu Jia-Nan Zhang Chong-Xin Shan Key Laboratory of Advanced Energy Catalytic and Functional Material Preparation of Zhengzhou College of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China Key Laboratory of Chemical Reaction Engineering of Shaanxi Province College of Chemistry and Chemical EngineeringYan’an UniversityYan’an 716000China Center for High Pressure Science and Technology Advanced Research PudongShanghai 201203China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin 300071China

In the quest to enhance the efficiency of sodium-ion batteries,the dynamics of solid electrolyte interphase(SEI)formation are of paramount *** SEI layer’s integrity is integral to the charge–discharge efficiency and the overall longevity of the ***,a novel two-dimensional Ti_(3)C_(2) fragments enmeshed on iron-nitrogen-carbon(Fe-N-C)nanosheets(Ti_(3)C_(2)/Fe-NC)has been *** electrode features a matrix which has been shown to expedite SEI layer formation through the facilitation of selective anion adsorption,thus augmenting battery *** functional theory calculation reveals that the SEI evolution energy of NaPF6 at the Ti_(3)C_(2)/Fe-N-C interface is 0.81 eV,significantly lower than the Ti_(3)C_(2)(1.23 eV).This process is driven by the electron transportation from Ti_(3)C_(2) to Fe-N-C substrate,facilitated by their work-function difference,leading to the formation of ferromagnetic Fe species,which possesses Fe 3d d_(xz)d_(z)2 orbitals and undergoes hybridization with theπandσorbitals of NaF,creating a key intermediate during *** process diminishes the antibonding energy and attenuates the orbital interaction with NaF,thus reducing the activation energy and improving the SEI formation reaction ***,it leads to the creation of multi-interface SEI characterized by high-throughput ion transport and an efficient reaction network.

关键词： Ti_(3)C_(2)/Fe-N-C heterostructure work-function electron interaction solid electrolyte interphase sodium storage

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Pushing working voltage of nickel-rich cathode to 4.6 V by stabilizing lattice oxygen redox via spinel Li_(4)Mn_5O_(12)coating

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Journal of Energy Chemistry 2025年第4期103卷 692-702页

作者： Yunting Wang Gaohui Du Di Han Jiahao Deng Weihao Shi Huayu Li Yongle Wang Siyao Wang Zhan Gao Youqing Wang Shixian Chen Wenqi Zhao Qingmei Su Bingshe Xu Materials Institute of Atomic and Molecular Science Shaanxi University of Science and TechnologyXi’an 710021ShaanxiChina Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030024ShanxiChina Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of TechnologyTaiyuan 030024ShanxiChina

Augmenting the working voltage is an effective way to maximize the energy density of Ni-rich layered Li[Ni_(0.8)Co_(0.1)Mn_(0.1)]O_(2)(NCM)to approach its theoretical ***,NCM suffers from structural degradation in deep delithiation state,which is often accompanied by severe surface lattice oxygen loss and transition metal dissolution,leading to restricted cycle ***,a facile and effective surfacestrengthening strategy is proposed,in which Mn(OH)_(2)nanoshells are uniformly grown on the NCM surface as a Li~+capturer and then converted to thin spinel Li_(4)Mn_(5)O_(12)layers during subsequent hightemperature *** resultant Li_(4)Mn_(5)O_(12)layers can enhance cathode-electrolyte interface electrochemical stability with inhibited electrolyte corrosion and accelerated Li~+*** theoretical calculations confirms that the Mn-O bonds formed at the interfaces can effectively decrease the oxygen activity,thereby further inhibiting the lattice oxygen release and structural degradation caused by the irreversible phase ***,the Li_(4)Mn_(5)O_(12)-coated NCM displays high capacity retention of 80.3%and 94.9%at 1 C and 5 C compared to the pristine NCM(52.5%and 10.1%)after 200 cycles and can operate stably at 2.7-4.6 V and 60℃.The spinel Li_(4)Mn_(5)O_(12)-coating demonstrates an effective route to enhance the structural/electrochemical stability of NCM for next-generation advanced lithium-ion batteries.

关键词： Ni-rich cathode Interfacial stability Li_(4)Mn_5O_(12)coating High voltage stability

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Enhancing the Hydrogen Embrittlement Resistance of Medium Mn Steels by Designing Metastable Austenite with a Compositional Core-shell Structure

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Acta Metallurgica Sinica(English Letters) 2023年第7期36卷 1059-1077页

作者： Jun Zhang Binhan Sun Zhigang Yang Chi Zhang Hao Chen Key Laboratory for Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Pressure Systems and Safety Ministryof EducationSchool of Mechanical and Power EngineeringEast China University of Science and TechnologyShanghai 200237China

Deformation-induced martensite transformation from metastable retained austenite is one of the most efficient strain-hardening mechanisms contributing to the enhancement of strength-ductility synergy in advanced high-strength ***,the hard transformation product(often-martensite)and the H redistribution associated with phase transformation essentially decrease materials’resistance to hydrogen *** solve this fundamental conflict,we introduce a new microstructure architecting strategy based on an accurately design of core–shell compositional distribution inside the austenite *** employed this approach in a typical medium Mn steel(8 wt.%Mn)with an ultrafine grained austenite-ferrite *** produced a high Mn content(15–16 wt.%)in the austenite shell region and a low Mn content(~12 wt.%)in the core region,through a thermodynamics-guided two-step austenite reversion *** room-temperature deformation,the austenite core transforms continuously starting from a low strain,providing a high and persistent strain-hardening *** transformation of Mn-rich austenite shell,on the other hand,occurs only at the latest regime of the deformation,thus effectively inhibiting the nucleation of H-induced cracks at ferrite/deformation-induced martensite interfaces as well as suppressing their growth and *** step-wise transformation,tailored directly targeted to protect the hydrogen-sensitive microstructure defects(interfaces),results in a significantly enhanced hydrogen embrittlement resistance without sacrificing the mechanical performance in hydrogen-free *** design of compositional core–shell structure is expected to be applicable to,at least,other multiphase advanced high-strength steels containing metastable austenite.

关键词： Medium Mn steels Hydrogen embrittlement Core-shell austenite Chemical heterogeneity Deformationinduced martensite transformation

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