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Thermal deformation behavior and related deformation mechanisms of Mg–3Y alloy under shear–compression loading conditions 认领 引用
1
作者 Xiaoqi Liu Shouxing Zhang +5 位作者 Jiaxu Zhang Ziqi Wang Nian Yan Xiuli Hou Rui Luo Tao Zhang 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第6期475-504,共30页
In this work,the shear–compression deformation behavior of Mg–3Y alloy was systematically investigated by physical and numerical simulation.During thermal deformation at 300℃–400℃ and strain rates of 0.001s1–0.1... In this work,the shear–compression deformation behavior of Mg–3Y alloy was systematically investigated by physical and numerical simulation.During thermal deformation at 300℃–400℃ and strain rates of 0.001s1–0.1s1,the shear–compression samples(SCSs)demonstrate sustained work hardening capability,which is supported by the Mises equivalent stress–strain curves.Numerical simulation and microstructure analysis reveal that after thermal deformation,the SCS exhibits three typical deformation regions.The slot region(Region Ⅰ)is primary stress and strain concentration zone;next is the transition region(Region Ⅱ);while stress and strain in the cylindrical region(Region Ⅲ)are minimal.Microstructure and micro-texture analyses of the slot region indicate that at 300℃,plastic deformation is primarily dominated byabasal slip,with multiple deformation twins assisting in-axis deformation.At 350℃,besidesabasal slip,aprismatic slip also participates,meanwhile,the proportion of deformation twinning decreases.At 400℃,the deformation is dominated byaprismatic slip,and deformation twinning nearly disappear.Additionally,both the increase in temperature and the decrease in strain rate play a promoting role in the occurrence of dynamic recrystallization(DRX).At 300℃,twin-induced dynamic recrystallization(TDRX)occurs within gain interiors.At 350℃,discontinuous dynamic recrystallization(DDRX)becomes the dominant mode.Both the DDRX and continuous dynamic recrystallization(CDRX)are enhanced at 400℃.Overall,the shear–compression stresses contribute to increasing the work hardening capability,while Y solute atoms stabilize the deformation microstructure by promoting non-basal dislocation activation and strengthening inter-atomic bonding.This dual mechanism significantly impedes dislocation mobility,resulting in pronounced work hardening and a substantial delay in the progress of DRX in Mg–3Y alloy at elevated temperatures. 展开更多
关键词 Mg–3Y alloy Shear–compression deformation Work hardening behavior Deformation twinning Dynamic recrystallization
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Effects of Mn and Al on property of Fe-based slag-free self-shielded flux-cored welding wire 认领 引用 被引量：1
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作者 Da-shuang Liu An-zhe Shen +8 位作者 Ping Wei Jian-hua Xu Wen-bin Huang Xiong-hui Li Jian Qin Lei Zhang Wei-min Long Adrian Wei-Yee Tan Vasily N.Lednev 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2025年第9期2974-2981,共8页
Fe-based slag-free self-shielded flux-cored welding wires with different Mn and Al additions were fabricated,and their processing properties and microstructures were studied.The results show that the slag coverage of ... Fe-based slag-free self-shielded flux-cored welding wires with different Mn and Al additions were fabricated,and their processing properties and microstructures were studied.The results show that the slag coverage of high-Al and high-Mn wires is 9.03%and 15.32%,respectively.At the current of 260 A and voltage of 27 V,a higher deposition rate of 25.06%and lower spatter loss rate of 24.42%are achieved with the high-Al welding wire,as compared with the high-Mn welding wire.The microstructure of the high-Al wire hardfacing alloy is flake ferrite andδ-ferrite,while the microstructure of the high-Mn wire hardfacing alloy is acicular ferrite.Since Al is a ferrite stabilizing element and Mn is an austenite stabilizing element,the addition of Al and Mn is capable of manipulating the type of precipitates by altering the degree of austenitization.Besides,inclusions in the hardfacing alloy may also be potential nucleation sites for acicular ferrite.Due to the better mechanical properties of acicular ferrite,the microhardness of high-Mn hardfacing alloys is higher than that of high-Al alloys. 展开更多
关键词 Hardfacing High manganese High aluminum Processing performance Microstructure
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Carbon dots mediated excitons dissociation in defect engineering for high-efficient visible-light-driven overall H2O2 photosynthesis from pure water 认领 引用
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作者 Kaiqu Sun Zixuan Guo +6 位作者 Jun Luo Xueying Wang Haoyuan Qin Lijing Wang Nan Zhao Changyu Lu Weilong Shi 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2026年第1期174-188,共15页
The pursuit of an efficient photocatalytic pathway for hydrogen peroxide(H2O2)synthesis from pure water without adding additional sacrifice agents poses a formidable research endeavor and remains a pivotal chall... The pursuit of an efficient photocatalytic pathway for hydrogen peroxide(H2O2)synthesis from pure water without adding additional sacrifice agents poses a formidable research endeavor and remains a pivotal challenge.Herein,we demonstrate that incorporating hexaketocyclohexane-derived carbon dots(H-CDs)and S vacancies into ZnIn2S4 weakens the exciton effect,leading to the dissociation into free carriers that participate in the dual pathways of oxygen reduction reaction and water oxidation reaction,thereby achieving efficient photocatalytic H2O2 production with a high H2O2 yield of 17.8 mM/g/h under visible light in pure water.Experimental results combined with theoretical calculations clearly illustrate that the presence of H-CDs and S vacancies modulates the local charge density of ZnIn2S4,markedly diminishing the exciton binding energy and facilitating the occurrence of exciton dissociation.Moreover,S vacancies and H-CDs effectively capture free electrons and extract free holes,respectively,significantly inhibiting the recombination of photogenerated electron-hole pairs.By optimizing the electronic structure and optical properties of ZnIn2S4,they thermodynamically satisfy the conditions for oxygen reduction and water oxidation reactions.Additionally,the synergy between H-CDs and S vacancies in ZnIn2S4 enhances the adsorption of oxygen and intermediate products,increasing their participation in the reaction and facilitating the conversion to H2O2.This work offers novel insights into catalyst design from the perspective of excitons dissociation,and underscores the distinct roles that free charge carriers play in various pathways for photocatalytic H2O2 production. 展开更多
关键词 Photosynthesis H2O2 Exciton dissociation Carbon dots Defect engineering
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Unlocking the structure and anion synergistic modulation of MoSe2 anode for ultra-stable and high-rate sodium-ion storage 认领 引用 被引量：2
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作者 Kang Xu Yu-Hui Li +6 位作者 Xin Wang Yu-Peng Cao Shuo-Tong Wang Liang Cao Qi-Tu Zhang Zhe-Fei Wang Jun Yang 《Rare Metals》 SCIE EI CAS CSCD 2025年第3期1661-1673,共13页
The two-dimensional MoSe2possesses a large interlayer spacing(0.65 nm)and a narrow bandgap(1.1 eV),showing potential in sodium-ion storage.However,it faces slow kinetics and volume stress during Na+(de)intercala... The two-dimensional MoSe2possesses a large interlayer spacing(0.65 nm)and a narrow bandgap(1.1 eV),showing potential in sodium-ion storage.However,it faces slow kinetics and volume stress during Na+(de)intercalation process,thereby affecting the cycling stability and lifespan of sodium-ion batteries(SIBs).In this work,a novel approach involving anionic doping and structural design has been proposed,wherein a two-step in-situ selenization and surface thermal annealing doping process is applied to fabricate a novel configuration material of fluorine-doped MoSe2@nitrogen-doped carbon nanosheets(F-MoSe2@FNC).The obtained F-MoSe2@FNC,benefiting from the dual advantages of structure and F-doping,synergistically promotes and accelerates the stable(de)intercalation of Na+.Henceforth,F-MoSe2@FNC demonstrates notable characteristics in terms of reversible specific capacity,boasting a high initial coulombic efficiency of 76.97%,alongside remarkable rate capabilities and cyclic stability.The constructed F-MoSe2@FNC anode-based half cell manifests exceptional longevity,enduring up to 2550 cycles at 10 A·g-1with a specific capacity of 322.04 mAh·g-1.Its electrochemical performance surpasses that of MoSe2@NC and Pure MoSe2,underscoring the significance of the proposed synergistic modulation.Through comprehensive kinetic analyses,encompassing in-situ electrochemical impedance spectroscopy(EIS),it is elucidated that the F-MoSe2@FNC electrode showcases elevated pseudo-capacitance and rapid diffusion attributes during charge and discharge processes.Furthermore,the assembled full-cell(F-MoSe2@FNC//Na3V2(PO4)3)attains a notable energy density of 166.94 Wh·kg-1.This design provides insights for the optimization of MoSe2electrodes and their applications in SIBs. 展开更多
关键词 Structural engineering Anion modulation Molybdenum diselenide Sodium-ion batteries Fast kinetics
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Characterization and Electrochemical Performance of ZnO Modified LiFePO_4/C Cathode Materials for Lithium-ion Batteries 认领 引用
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作者 刘树信 殷恒波 +2 位作者 王海滨 何冀川 王洪 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第3期353-360,共8页
To improve the electrical conductivity of LiFePO4 cathode materials, the ZnO modified LiFePO4/C cathode materials are synthesized by a two-step process including solid state synthesis method and precipitation method. ... To improve the electrical conductivity of LiFePO4 cathode materials, the ZnO modified LiFePO4/C cathode materials are synthesized by a two-step process including solid state synthesis method and precipitation method. The structures and compositions of ZnO modified LiFePO4/C cathode materials are characterized and analyzed by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and energy dispersive spectroscopy, which indicates that the existence of ZnOhas little or no effect on the crystal structure, particles size and morphology of LiFePO4. The electrochemical performances are also characterized and analyzed with charge-discharge test, cyclic voltammetry and electrochemical impedance spectroscopy. The results show that the existence of ZnO improves the specific capability and lithium ion diffusion rate of LiFePO4 cathode materials and reduces the charge transfer resistance of cell, and the one with 3 wt% ZnO exhibits the best electrochemical performance. 展开更多
关键词 LiFePO4 electrochemical performance cathode materials,lithium-ion batteries surface modification
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Influence of filler materials on microstructure and mechanical properties of MGH956 alloy in TIG welding 认领 引用
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作者 雷玉成 赵凯 +1 位作者 朱强 黄巍 《China Welding》 EI CAS 2012年第4期59-64,共6页
In order to improve the mechanical properties of MGH956 alloy fusion weZding joint, two kinds of self-made materials were used as filler materials to MGH956 alloy for TIG welding respectively. Microstracture and tensi... In order to improve the mechanical properties of MGH956 alloy fusion weZding joint, two kinds of self-made materials were used as filler materials to MGH956 alloy for TIG welding respectively. Microstracture and tensile fracture of joints were researched by scanning electron microscope（SEM）. Reinforced particles were researched by SEM, X-ray diffraction （ XRD ） and energy dispersive X-ray spectrometry （EDS）. These results were compared with joint which is filled with base materials. The results show that new reinforced phases such as TiC, TiN, Ni3Al and A1Ni are produced in the weld metal zone with two kinds of self-made materials as filler materials. The size of these reinforcements is about 1 μm, and the distribution of particles is very uniform in the matrix. The number of pores is reduced. Agglomerate Al-Y-O composite oxides are correspondingly decreased compared to the joint filled with base material. Thus, welded joint perormanee is enhanced. The average room temperature tensile strength of joints are 581 MPa and 607 MPa respectively. The fracture of joints both in general exhibit brittle fracture. 展开更多
关键词 MGH956 alloy TIG welding microstructure metallurgy mechanism reinforce particles mechanical properties
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Recent progress in high entropy alloys:microstructure,mechanical properties,and corrosion behavior 认领 引用
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作者 Jian-Yang Han Hao-Kun Yang +5 位作者 Ya-Ru Huang Xiang Cai Ini-Ibehe Nabuk Etim Zhi-Bin Zheng Yan-Xin Qiao Xin Zhang 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第6期277-292,共16页
High entropy alloys(HEAs)have no less than four principal elements in(near)equal atomic percentage,exhibiting a solid solution state with fine precipitates,as well as distinct material properties.HEAs material design ... High entropy alloys(HEAs)have no less than four principal elements in(near)equal atomic percentage,exhibiting a solid solution state with fine precipitates,as well as distinct material properties.HEAs material design method influences its mechanical and corrosion behaviors significantly,but the underlying mechanism needs further investigation.It has been reported that the second-phase precipitates,work hardening behavior,and corrosion resistance of HEAs are vary depending on the amount of alloying element and heat treatment.The research progress of HEAs and their unique characteristics are reviewed,including microstructural evolution,mechanical properties,and corrosion behaviors.Also the description of HEA’s solid solution and precipitates strengthening will be highlighted.Furthermore,the effects of alloying and heat treatment,on the above-mentioned properties,are discussed.In addition,the challenges,prospects,and industrial applications of HEAs will be discussed.Furthermore,this work points out the future developments of HEAs,fulfilling the strict requirement from industries. 展开更多
关键词 High entropy alloy Material design Microstructural evolution Mechanical property Corrosion
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Recent progress of surface coating on cathode materials for high-performance lithium-ion batteries 认领 引用 被引量：59
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作者 Peiyuan Guan Lu Zhou +5 位作者 Zhenlu Yu Yuandong Sun Yunjian Liu Feixiang Wu Yifeng Jiang Dewei Chu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第4期220-235,共16页
Lithium-ion batteries (LIB) have received substantial attention in the last 10 years,as they offer great promise as power sources that can lead to the electric vehicle (EV) revolution in the next 5 years.Since the cat... Lithium-ion batteries (LIB) have received substantial attention in the last 10 years,as they offer great promise as power sources that can lead to the electric vehicle (EV) revolution in the next 5 years.Since the cathode serves as a key component in LIB,its properties significantly affect the performance of the whole system.Recently,the cathode surface modification based on coating technique has been widely employed to enhance the electrochemical performances by improving the material conductivity,stabilising the physical structure of materials,as well as preventing the reactions between the electrode and electrolyte.In this work,we reviewed the present of a number of promising cathode materials for Li-ion batteries.After that,we summarized the very recent research progress focusing on the surface coating strategies,mainly including the coating materials,the coating technologies,as well as the corresponding working mechanisms for cathodes.At last,the challenges faced and future guidelines for optimizing cathode materials are discussed.In this study,we propose that the structure of cathode is a crucial factor during the selection of coating materials and technologies. 展开更多
关键词 Lithium-ion battery Cathode Surface Coating Electrochemical performance
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Effects of in-situZrB_2 nanoparticles and scandium on microstructure and mechanical property of 7N01 aluminum alloy 认领 引用 被引量：6
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作者 Xizhou Kai Yuhui Wang +8 位作者 Ruikun Chen Yanjie Peng Anjun Shi Ran Tao Xiangfeng Liang Guirong Li Gang Chen Xiaojing Xu Yutao Zhao 《Journal of Rare Earths》 SCIE EI CAS CSCD 2024年第3期612-620,I0007,共9页
In this study, the in-situ synthesized ZrB2 nanoparticles and rare earth Sc were introduced to enhance the strength and ductility of 7N01 aluminum alloy, via the generation of high-melting and uniform nanodispersoi... In this study, the in-situ synthesized ZrB2 nanoparticles and rare earth Sc were introduced to enhance the strength and ductility of 7N01 aluminum alloy, via the generation of high-melting and uniform nanodispersoids. The microstructure and mechanical property evolution of the prepared composites and the interaction between ZrB2 and Sc were studied in detail. The microstructure investigation shows that the introduction of rare earth scandium(Sc) can promote the distribution of ZrB2 nanoparticles, by improving their wettability to the Al melt. Meanwhile, the addition of rare earth Sc also modifies the coarse Al Zn Mg Mn Fe precipitated phases, refines the matrix grains and generates high-melting Al_3(Sc,Zr)/Al_3Sc nanodispersoids. Tensile tests of the composites show that with the combinatorial introduction of ZrB2 and Sc, the strength and ductility of the composites are improved simultaneously compared with the corresponding 7N01 alloy, ZrB2 /7N01 composite and Sc/7N01 alloy. And the optimum contents of ZrB2 and Sc are 3 wt% and 0.2 wt% in this study. The yield strength, ultimate strength and elongation of(3 wt% ZrB2 +0.2 wt% Sc)/7N01 composite are 477 MPa, 506 MPa and 9.8%, increased about 18.1%, 12.2%and 38% compared to 7N01 alloy. Furthermore, the cooperation strengthening mechanisms of ZrB2 and Sc are also discussed. 展开更多
关键词 7N01 aluminum alloy In-situ ZrB2nanoparticles Rare earth Sc Microstructure Mechanical property Mechanism
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Isothermal transformation and precipitation behaviors of titanium microalloyed steels 认领 引用 被引量：7
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作者 Xiang-dong Huo Kang He +2 位作者 Ji-nian Xia Lie-jun Li Song-jun Chen 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2021年第3期335-345,共11页
The microstructure transformation and precipitation behavior of nano-carbides in Ti microalloyed steel during isothermal process were studied by a compression test on a Gleeble 3800 thermomechanical simulator and anal... The microstructure transformation and precipitation behavior of nano-carbides in Ti microalloyed steel during isothermal process were studied by a compression test on a Gleeble 3800 thermomechanical simulator and analyzed by optical microscopy,transmission electron microscopy and other methods.The results show thatγ→αphase transformation and TiC precipitation take place in Ti microalloyed steel during the isothermal process,and time–temperature–transformation curve and precipitation–time–temperature(PTT)curve are all of“C”-type.During the isothermal process,the interphase precipitation of TiC mostly occurs at the period of the phase transformation,and the random precipitation of TiC mostly occurs on the ferrite after the phase transformation.The increment in yield strength at the initial stage of isothermal transformation mainly comes from phase transformation strengthening.With the increase in isothermal time,the precipitation hardening effect becomes more important for nucleation and growth of titanium carbides and eventually reaches the maximum value at the precipitation finished point of the PTT curve. 展开更多
关键词 Ti microalloyed steel Isothermal process Transformation Precipitation hardening Nanometer carbide
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Highly nonlinear property and threshold voltage of Sc_2O_3 doped ZnO-Bi_2O_3-based varistor ceramics 认领 引用 被引量：6
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作者 徐东 吴婕婷 +4 位作者 焦雷 徐红星 张培枚 于仁红 程晓农 《Journal of Rare Earths》 SCIE EI CAS CSCD 2013年第2期158-163,共6页
A series of ZnO-Bi2O3-based varistor ceramics doped with 0-0.4 mol.% Sc2O3 were prepared by high-energy ball milling and sintered at temperatures between 1000 and 1150oC. X-ray diffractometry （XRD） and scanning elec... A series of ZnO-Bi2O3-based varistor ceramics doped with 0-0.4 mol.% Sc2O3 were prepared by high-energy ball milling and sintered at temperatures between 1000 and 1150oC. X-ray diffractometry （XRD） and scanning electron microscopy （SEM） were applied to characterize the phases and microstructure of the varistor ceramics. A DC parameter instrument for varistor ceramics was applied to investigate the electronic properties and V-I characteristics. The results showed that there were no changes in crystal structure with Sc2O3-doped varistor ceramics and that the average size of ZnO grain increased first and then decreased. The best electronic characteristics of the varistor ceramics prepared by high-energy ball milling were found in 0.3 mol.% Sc2O3-doped ZnO-Bi2O3 -based ceramics sintered at 1000 oC, which exhibited a threshold voltage of 821 V/mm, nonlinear coefficient of 62.1 and leakage current of 0.16 μA. 展开更多
关键词 ceramics varistors rare earth alloys and compounds microstructure electrical properties
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Effect of cooling parameters on the microstructure and properties of Mo-bearing and Cr-bearing steels 认领 引用 被引量：3
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作者 Xiang-dong Huo Yu-qian Li +2 位作者 Yu-tao Zhao Hai-wang Zhang Zhao-hui Li 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2011年第5期551-556,共6页
To develop low-cost low carbon bainitic steel,Mo-bearing and Cr-bearing steels were melted in a vacuum induction furnace and were researched by thermal simulation and hot rolling at the laboratory.As the cooling rate ... To develop low-cost low carbon bainitic steel,Mo-bearing and Cr-bearing steels were melted in a vacuum induction furnace and were researched by thermal simulation and hot rolling at the laboratory.As the cooling rate increases from 0.2 to 50°C/s,the transformation temperatures of two steels lie between 650 and 400°C,and the final microstructures of them change from quasi-polygonal ferrite and granular bainite to lath bainite.Compared with cooling in air or by interrupted cooling,Mo-bearing and Cr-bearing steel plates cooled by sprayed water boast higher strength and superior toughness,for large-size islands are responsible for the poor mechanical properties.Compared to Mo,Cr is effective to isolate the bainitic reaction in low carbon steel,and the bainitic microstructure can also be obtained in Cr-bearing steel cooled at a wide range of cooling rate. 展开更多
关键词 low carbon steel bainite phase transformations chromium microstructure mechanical properties
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Synthesis,Structure and Dielectric Properties of a Novel 1D Chain Bismuth(Ⅲ) Complex[(C_6H_6NO_2)_2·(BiCl_5)·2H_2O]_n 认领 引用 被引量：3
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作者 陈立庄 高延敏 +1 位作者 邹俊 黄美娜 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第2期284-288,共5页
Under hydrothermal conditions,isonicotinic acid reacted with BiCl 3 to give 1D zigzag chain complex [（C 6 H 6 NO 2） 2 ·（BiCl 5）·2H 2 O] n （1）.Single-crystal X-ray determination shows that compound 1 cr... Under hydrothermal conditions,isonicotinic acid reacted with BiCl 3 to give 1D zigzag chain complex [（C 6 H 6 NO 2） 2 ·（BiCl 5）·2H 2 O] n （1）.Single-crystal X-ray determination shows that compound 1 crystal-lizes in the monoclinic system,space group C2/c with a=13.115（3）,b=19.957（4）,c=7.9374（16）,β=97.45（3）°,Z=4,V=2060.0（8） 3,C 12 H 16 BiCl 5 N 2 O 6,D c=2.162 g/cm 3,M r=670.50,λ（MoKa）=0.71073,μ=9.237 mm-1,F（000）=1272,R=0.0208 and wR=0.0503.Dielectric constant of compound 1 was measured at different conditions.Measurements on the dielectric properties of 1 showed that the 1D chain coordination polymer exhibited a dipolar chain relaxation process and a relatively high dielectric constant. 展开更多
关键词 1D chain bismuth complex hydrothermal permittivity
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Ternary Ni2P/Bi2MoO6/g-C3N4composite with Z-scheme electron transfer path for enhanced removal broad-spectrum antibiotics by the synergistic effect of adsorption and photocatalysis 认领 引用 被引量：3
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作者 Feng Guo Zhihao Chen +4 位作者 Xiliu Huang Longwen Cao Xiaofang Cheng Weilong Shi Lizhuang Chen 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2022年第4期157-168,共12页
Constructing the stable,low-cost,efficient,and highly adaptable visible light-driven photocatalyst to implement the synergistic effect of photocatalysis and adsorption has been excavated a promising strategy to deal w... Constructing the stable,low-cost,efficient,and highly adaptable visible light-driven photocatalyst to implement the synergistic effect of photocatalysis and adsorption has been excavated a promising strategy to deal with antibiotic pollution in water bodies.Herein,a novel 3 D ternary Z-scheme heterojunction photocatalyst Ni2P/Bi2MoO6/g-C3N4(Ni2P/BMO/CN)was fabricated by a simple solvothermal method in which the broad spectrum antibiotics(mainly tetracyclines and supplemented by quinolones)were used as target pollution sources to evaluate its adsorption and photocatalytic performance.Notably,the Zscheme composite significantly exhibit the enhancement for degradation efficiency of tetracycline and other antibiotic by using Ni2P nanoparticles as electron conductor.Active species capture experiment and electron spin resonance(ESR)technology reveal the mechanism of Z-scheme Ni2P/BMO/CN photocatalytic reaction in detail.In addition,based on the identification of intermediates by liquid chromatography–mass spectroscopy(LC–MS),the possible photocatalytic degradation pathways of TC were proposed. 展开更多
关键词 Ni2P/Bi2MoO6/g-C3N4 Z-scheme Photocatalysis Adsorption
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Synthesis and Optical Properties of Ce-doped ZnO 认领 引用 被引量：4
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作者 YANG Jing-hai GAO Ming +8 位作者 ZHANG Yong-jun YANG Li-li LANG Ji-hui WANG Dan-dan WANG Ya-xin LIU Hui-lian FAN Hou-gang WEI Mao-bin LIU Fu-zhu 《Chemical Research in Chinese Universities》 SCIE CAS 2008年第3期266-269,共4页
ZnO nanorods were synthesized using the sol-gel method, and the effects of annealing temperature and Ce doping on the morphologies and optical properties of ZnO nanostructures were investigated in detail. The XRD meas... ZnO nanorods were synthesized using the sol-gel method, and the effects of annealing temperature and Ce doping on the morphologies and optical properties of ZnO nanostructures were investigated in detail. The XRD measurements showed that the as-synthesized ZnO nanostructures had a hexagonal wurtzite structure. SEM images showed that uniform nanorods formed at 900 °C. Photoluminescence measurements showed an ultraviolet emission peak and a relatively broad visible light emission peak for the samples sintered at different temperatures. The UV emission peak bathochromically shifted when the annealing temperature rose from 850 to 1000 °C. Ce doping decreased the synthesized temperature of the ZnO nanorods to 500 °C, and the UV peaks hypsochromically shifted. 展开更多
关键词 Annealing temperature Ce-doped ZnO Optical property
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Effect of strain-induced precipitation on microstructure and properties of titanium micro-alloyed steels 认领 引用 被引量：2
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作者 Xiang-dong Huo Zhi-wei Lv +3 位作者 Chen Ao Lie-jun Li Ji-nian Xia Song-jun Chen 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2022年第6期983-993,共11页
The strain-induced precipitation behavior of titanium micro-alloyed steel was examined through the stress relaxation method.In addition,the relationship between strain-induced precipitation and isothermal precipitatio... The strain-induced precipitation behavior of titanium micro-alloyed steel was examined through the stress relaxation method.In addition,the relationship between strain-induced precipitation and isothermal precipitation was explored.The findings revealed that the strain-induced precipitation and recrystallization processes of titanium micro-alloyed steel coexist and compete at the same time.The results also showed that the recrystallization process was inhibited with straininduced precipitation.Moreover,a large amount of nano-sized TiC particles precipitated in Ti micro-alloyed steel.Notably,the strain-induced precipitated TiC had a size of 10 nm and isothermally precipitated TiC had a size of 3–6 nm.Additionally,there was a clear competitive relationship between strain-induced precipitation and isothermal precipitation.The findings also showed that strain-induced precipitation had an obvious effect on the refinement of austenite although the effect was not obvious on the increase in the yield strength.Furthermore,isothermal treatment was shown to be more advantageous than strain-induced precipitation.Finally,the major increase in the yield strength was mainly attributed to the precipitation strengthening of nano-sized TiC during isothermal precipitation. 展开更多
关键词 Ti micro-alloyed steel Stress relaxation Nanometer-carbide Strain-induced precipitation Isothermal precipitation
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Effects of TMCP Schedule on Precipitation,Microstructure and Properties of Ti-microalloyed High Strength Steel 认领 引用 被引量：18
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作者 Xiang-dong HUO Lie-jun LI +1 位作者 Zheng-wu PENG Song-jun CHEN 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2016年第6期593-601,共9页
Using the similar compositions of the Ti-microalloyed high-strength steels produced by the thin-slab casting process of compact strip production（CSP）,four thermo-mechanical control processes（TMCP）after the simulat... Using the similar compositions of the Ti-microalloyed high-strength steels produced by the thin-slab casting process of compact strip production（CSP）,four thermo-mechanical control processes（TMCP）after the simulated thickslab casting,i.e.the two hot rolling routes and the two cooling processes,were designed,aiming at achieving the same mechanical properties as the thin strip products.The final microstructures after the four TMCP processes were examined by optical microscope（OM）,scanning electron microscope（SEM）and transmission electron microscope（TEM）.The tensile properties and Charpy impact energy were measured correspondingly.Strain-induced TiC precipitation was found in the two-stage rolling route with the finish rolling temperature at low levels,leading to grain refinement due to the pinning effect during austenite recrystallization.Precipitation hardening in ferrite was observed when a period of isothermal holding was applied after hot rolling.It could be concluded that both finish rolling temperature and the subsequent isothermal holding temperature were crucial for the achieved strength level due to the combined effect of grain refinement and precipitation hardening.At the same time,it was found that the isothermal holding led to poor impact toughness because of remarkable precipitation hardening.Therefore,it was suggested that the precipitation kinetics of titanium carbides in both austenite and ferrite should be investigated in future. 展开更多
关键词 TMCP refinement hardening holding rolling titanium isothermal Precipitation austenite ferrite
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Recent advances in flexible alkaline zinc-based batteries:Materials,structures,and perspectives 认领 引用 被引量：2
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作者 Yanzhe Zhu Peiyuan Guan +9 位作者 Renbo Zhu Shuo Zhang Ziheng Feng Mengyao Li Tao Wan Long Hu Yunjian Liu Qin Li Juan Yu Dewei Chu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第12期61-88,I0004,共28页
The development of wearable electronic systems has generated increasing demand for flexible power sources.Alkaline zinc(Zn)-based batteries,as one of the most mature energy storage technologies,have been considered as... The development of wearable electronic systems has generated increasing demand for flexible power sources.Alkaline zinc(Zn)-based batteries,as one of the most mature energy storage technologies,have been considered as a promising power source owing to their exceptional safety,low costs,and outstanding electrochemical performance.However,the conventional alkaline Zn-based battery systems face many challenges associated with electrodes and electrolytes,causing low capacity,poor cycle life,and inferior mechanical performance.Recent advances in materials and structure design have enabled the revisitation of the alkaline Zn-based battery technology for applications in flexible electronics.Herein,we summarize the up-to-date works in flexible alkaline Zn-based batteries and analyze the strategies employed to improve battery performance.Firstly,we introduce the three most reported cathode materials(including Ag-based,Ni-based,and Co-based materials)for flexible alkaline Zn-based batteries.Then,challenges and modifications in battery anodes are investigated.Thirdly,the recently advanced gel electrolytes are introduced from their properties,functions as well as advanced fabrications.Finally,recent works and the advantages of sandwich-type,fiber-type and thin film-type flexible batteries are summarized and compared.This review provides insights and guidance for the design of high-performance flexible Zn-based batteries for next-generation electronics. 展开更多
关键词 Alkaline zinc-based batteries Cathode materials Anodeissue Gel electrolytes Flexibility Design strategy
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Isothermal oxidation behavior and mechanism of a nickel-based superalloy at 1000°C 认领 引用 被引量：5
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作者 Zhi-yuan Zhu Yuan-fei Cai +3 位作者 You-jun Gong Guo-ping Shen Yu-guo Tu Guo-fu Zhang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2017年第7期776-783,共8页
The oxidation behavior of a nickel-based superalloy at 1000°C in air was investigated through X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy analysis. A series of oxides, incl... The oxidation behavior of a nickel-based superalloy at 1000°C in air was investigated through X-ray diffraction, scanning electron microscopy, and energy-dispersive spectroscopy analysis. A series of oxides, including external oxide scales（Cr_2O_3,（TiO_2 ＋ Mn Cr_2O_4）） and internal oxides（Al_2O_3,Ti N）, were formed on the surface or sub-surface of the substrate at 1000°C in experimental still air. The oxidation resistance of the alloy was dependent on the stability of the surface oxide layer. The continuity and density of the protective Cr_2O_3 scale were affected by minor alloying elements such as Ti and Mn. The outermost oxide scale was composed of TiO_2 rutile and Mn Cr_2O_4 spinel, and the growth of TiO_2 particles was controlled by the outer diffusion of Ti ions through the pre-existing oxide layer. Severe internal oxidation occurred beneath the external oxide scale, consuming Al and Ti of the strength phase γ′（Ni_3（Al,Ti）） and thereby severely deteriorating the surface mechanical properties. The depth of the internal oxidation region was approximately 35 μm after exposure to experimental air at 1000°C for 80 h. 展开更多
关键词 nickel-based superalloy isothermal oxidation oxide scale internal oxidation
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Hot Isostatic Pressing and Characterizations of Eu3+-doped(Gd,Lu)2O3 Transparent 认领 引用 被引量：1
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作者 LIU Qiang HE Ningtong +7 位作者 WANG Yanbin HUANG Dong CHEN Yuyang LI Tingsong ZHOU Zhenzhen HU Chen IVANOV Maxim LI Jiang 《发光学报》 EI CAS CSCD 北大核心 2024年第12期1975-1983,共9页
(Gd,Lu)2O3∶Eu scintillation ceramics have promising applications in the high-energy X-ray imaging.Eu0.1Gd0.6Lu1.3O3 nano-powders with pure phase were prepared from the precursor calcined at 1050℃for 4 h by the... (Gd,Lu)2O3∶Eu scintillation ceramics have promising applications in the high-energy X-ray imaging.Eu0.1Gd0.6Lu1.3O3 nano-powders with pure phase were prepared from the precursor calcined at 1050℃for 4 h by the co-precipitation method.Using the synthesized nano-powders as initial material,Eu0.1Gd0.6Lu1.3O3ceramics were fabri-cated by vacuum pre-sintering at different temperatures for 2 h and hot isostatic pressing(HIP)at 1750℃for 3 h in ar-gon.The influence of pre-sintering temperature on the microstructure,optical and luminescence properties was investi-gated.The Eu0.1Gd0.6Lu1.3O3ceramics pre-sintered at 1625℃for 2 h combined with HIP post-treatment show the high-est in-line transmittance of 75.2%at 611 nm.The photoluminescence(PL)and X-ray excited luminescence(XEL)spectra of the Eu0.1Gd0.6Lu1.3O3transparent ceramics demonstrate a strong red emission peak at 611 nm due to the5D0→7F2 transition of Eu3+.The PL,PLE and XEL intensities of the HIP post-treated Eu0.1Gd0.6Lu1.3O3ceramics show a trend of first ascending and then descending with the increase of pre-sintering temperature.The thermally stimulated lumines-cence(TSL)curve of the HIP post-treated Eu0.1Gd0.6Lu1.3O3ceramics presents one high peak at 178 K and two peaks with lower intensities at 253 K and 320 K.The peak at 320 K may be related to oxygen vacancies,and the lumines-cence peak at 178 K is related to defects caused by the valence state changes of Eu3+ions. 展开更多
关键词 (Gd,Lu)2O3∶Eu transparent ceramics microstructure optical properties hot isostatic pressing
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