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Improving Intergranular Corrosion Resistance in Inconel 625 via Grain Boundary Character Distribution Optimization

Journal of Wuhan University of technology(materials Science) 2021年第6期36卷 911-921页

作者： MA Yuanjun WANG Jingjie GAO Yubi WANG Xingmao CHEN Jianjun DING Yutian 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

The feasibility of applying the grain boundary character distribution(GBCD)optimization to Inconel 625 for improving the intergranular corrosion(IGC)resistance was *** GBCD was obtained and characterized by electron backscatter diffraction(EBSD)analysis,and its optimization was mainly attributed to annealing twins(Σ3)and twins related to boundaries formed during thermal-mechanical processing(TMP).Through TMP of 5%cold rolling and subsequent annealing at 1150℃for 5 min,the proportion of lowΣcoincidence site lattice(CSL)grain boundaries of the Inconel 625 can be enhanced to about 35.8%which mainly were ofΣ3^(n)(n=1,2,3)*** is an increase of 24.8%compared with the solution-treated sample,and simultaneously the large-size highly-twinned grain-cluster microstructure is *** grain-cluster is mainly composed ofΣ3-Σ3-Σ9 orΣ3-Σ9-Σ27 triple junctions,which is mainly caused by boundary reactions during grain *** them,the IGC resistance ofΣ3 grain boundaries,Σ9 grain boundaries and random grain boundaries is sequentially *** the increase of the lowΣCSL grain boundary fraction,the IGC resistance of Inconel 625 *** essential reason is the amount ofΣ3 boundaries interrupting the random boundary network increases and the large grain-cluster arrests the penetration of IGC.

关键词： nickel-based superalloys grain boundary characteristic distribution(GBCD) corrosion behavior lowΣcoincidence site lattice(lowΣCSL) EBSD

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Boosting in-plane anisotropy by periodic phase engineering in two-dimensional VO_(2) single crystals

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Fundamental Research 2022年第3期2卷 456-461页

作者： Meng Ran Chao Zhao Xiang Xu Xiao Kong Younghee Lee Wenjun Cui Zhi-Yi Hu Alexander Roxas Zhengtang Luo Huiqiao Li Feng Ding Lin Gan Tianyou Zhai State Key Laboratory of Materials Processing and Die and Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China Centre for Multidimensional Carbon Materials Institute for Basic ScienceSchool of Materials Science and EngineeringUlsan National Institute of Science and TechnologyUlsanSouth Korea Center for Integrated Nanostructure Physics Institute for Basic ScienceSungkyunkwan UniversitySuwonSouth Korea State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research CentreWuhan University of TechnologyWuhan 430074China Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

In-plane anisotropy(IPA)due to asymmetry in lattice structures provides an additional parameter for the precise tuning of characteristic polarization-dependent properties in two-dimensional(2D)materials,but the narrow range within which such method can modulate properties hinders significant development of related *** we present a novel periodic phase engineering strategy that can remarkably enhance the intrinsic IPA obtainable from minor variations in asymmetric *** introducing alternant monoclinic and rutile phases in 2D VO_(2)single crystals through the regulation of interfacial thermal strain,the IPA in electrical conductivity can be reversibly modulated in a range spanning two orders of magnitude,reaching an unprecedented IPA of *** an intriguing local phase engineering in 2D materials can be well depicted and predicted by a theoretical model consisting of phase transformation,thermal expansion,and friction force at the interface,creating a frame-work applicable to other 2D ***,the considerable adjustability and reversibility of the presented strategy provide opportunities for future polarization-dependent photoelectric and optoelectronic devices.

关键词： Periodic phase engineering Two-dimensional VO_(2) Interfacial strain In-plane anisotropy Electrical anisotropy Chemical vapor deposition

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Adsorptive Behavior of Methyl Blue on Graphene Aerogel:A Mechanism Study

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Journal of Wuhan University of technology(materials Science) 2021年第2期36卷 239-242页

作者： SONG Xuyan HE Yunlu PAN Xi WEI Min LI Ran ZHOU Xiaoyu ZHENG Ying LI Junsheng TANG Haolin Technology Centre of Hubei China Tobacco Industry Co. Ltd.Wuhan 430051China College of Urban Construction Wuchang Shouyi UniversityWuhan 430064China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Graphene aerogel was synthesized and used for the removal of methyl blue from aqueous *** effect of solution pH,temperature and adsorption time on the adsorption performance of the graphene aerogel was studied *** addition,investigations were also performed to determine the nature of *** experimental results show that graphene aerogel is a highly efficient adsorbent for the treatment of methyl blue in aqueous *** addition,the adsorption of methyl blue proceeds through a single layer physical adsorption on the graphene *** findings herein are useful for the future development of adsorbent for in water.

关键词： graphene aerogel adsorption methyl blue mechanism

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A review of CoSb_(3)-based skutterudite thermoelectric materials

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Journal of advanced Ceramics 2020年第6期9卷 647-673页

作者： Zhi-Yuan LIU Jiang-Long ZHU Xin TONG Shuo NIU Wen-Yu ZHAO School of Materials Science and Engineering Anhui University of TechnologyMaanshan 243002China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Ministry of EducationAnhui University of TechnologyMaanshan 243002China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

The binary skutterudite CoSb_(3) is a narrow bandgap semiconductor thermoelectric(TE)material with a relatively flat band structure and excellent electrical ***,thermal conductivity is very high because of the covalent bond between Co and Sb,resulting in a very low ZT ***,researchers have been trying to reduce its thermal conductivity by the different optimization *** addition,the synergistic optimization of the electrical and thermal transport parameters is also a key to improve the ZT value of CoSb_(3) material because the electrical and thermal transport parameters of TE materials are closely related to each other by the band structure and scattering *** review summarizes the main research progress in recent years to reduce the thermal conductivity of CoSb_(3)-based materials at atomic-molecular scale and nano-mesoscopic *** also provide a simple summary of achievements made in recent studies on the non-equilibrium preparation technologies of CoSb_(3)-based materials and synergistic optimization of the electrical and thermal transport *** addition,the research progress of CoSb_(3)-based TE devices in recent years is also briefly discussed.

关键词： skutterudite CoSb_(3)-based materials lattice thermal conductivity synergistic optimization thermoelectric properties thermoelectric devices

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The Effect of Cryogenic-Temperature Rolling on the Microstructure and Mechanical Properties of TA18 Titanium Alloy

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Journal of materials Engineering and Performance 2025年 1-7页

作者： Yan, Yiwen Liu, Pei Zhang, Zhiyong Wang, Aiqin Wang, Zhizhi Wei, Xuekun Xie, Jingpei College of Materials Science and Engineering Henan University of Science and Technology Luoyang China Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology Luoyang China State Key Laboratory of Advanced Casting Technologies Shenyang China

It has long been a huge challenge to simultaneously optimize the strength and plasticity of near-α TA18 titanium (Ti) alloy prepared by traditional rolling deformation processes. In this study, the TA18 Ti alloy sheet that integrates fine grains and high-density deformation twins (DT) was prepared by a short-process technique combining hot rolling in the β-single-phase region and cryogenic-temperature rolling (CTR). Notably, this method enables the TA18 Ti alloy to achieve excellent strength–ductility synergy. The alloy exhibits the ultimate tensile strength (UTS) of ~ 1005 MPa, the yield strength (YS) of ~ 921 MPa, and the elongation of ~ 15%. The high strength is mainly caused by the combined effects of obvious grain refinement strengthening in the fine-grained (FG) region and the presence of dislocations after CTR. Meanwhile, the combined effect of twin boundary strengthening caused by the interaction of deformation twins (DTs) and dislocations also causes an increase in strength. In addition, stacking faults within twins are activated during plastic deformation, which significantly improves the ductility of the material and endows the TA18 Ti alloy with excellent ductility. The results of our study provide an effective way for developing Ti alloys with excellent strength–ductility synergy by introducing fine grains and high-density deformation twins.

关键词：

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Fast and stable K-ion storage enabled by synergistic interlayer and pore-structure engineering

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Nano Research 2021年第12期14卷 4502-4511页

作者： Deping Li Qing Sun Yamin Zhang Xinyue Dai Fengjun Ji Kaikai Li Qunhui Yuan Xingjun Liu Lijie Ci State Key Laboratory of Advanced Welding and Joining School of Materials Science and EngineeringHarbin Institute of Technology(shenzhen)Shenzhen518055China Research Center for Carbon Nanomaterials Key Laboratory for Liquid-Solid Structural Evolution&Processing of Materials(Ministry of Education)School of Materials Science and EngineeringShandong UniversityJinan250061China

Carbon-based material has been regarded as one of the most promising electrode materials for potassium-ion batteries(PIBs).However,the battery performance based on reported porous carbon electrodes is still unsatisfactory,while the in-depth K-ion storage mechanism remains relatively ***,we propose a facile“in situ self-template bubbling”method for synthesizing interlayer-tuned hierarchically porous carbon with different metallic ions,which delivers superior K-ion storage performance,especially the high reversible capacity(360.6 mAh·g^(−1)@0.05 A·g^(−1)),excellent rate capability(158.6 mAh·g^(−1)@10.0 A·g^(−1))and ultralong high-rate cycling stability(82.8%capacity retention after 2,000 cycles at 5.0 A·g^(−1)).Theoretical simulation reveals the correlations between interlayer distance and K-ion diffusion ***,deliberately designed consecutive cyclic voltammetry(CV)measurements,ex situ Raman tests,galvanostatic intermittent titration technique(GITT)method decipher the origin of the excellent rate performance by disentangling the synergistic effect of interlayer and pore-structure *** the facile preparation strategy,superior electrochemical performance and insightful mechanism investigations,this work may deepen the fundamental understandings of carbon-based PIBs and related energy storage devices like sodium-ion batteries,aluminum-ion batteries,electrochemical capacitors,and dual-ion batteries.

关键词： potassium-ion batteries synergistic interlayer and pore-structure engineering theoretical calculations carbonaceous electrode ex situ Raman technique

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Construction of nickel cobalt sulfide nanosheet arrays on carbon cloth for performance-enhanced supercapacitor

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Journal of materials Science & technology 2020年第12期47卷 113-121页

作者： Tao Liu Jiahao Liu Liuyang Zhang Bei Cheng Jiaguo Yu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyLuoshi Road 122Wuhan430070China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China

materials featured with self-supported three-dimensional network,hierarchical pores and rich electrochemical active sites are considered as promising electrodes for ***,a novel strategy for the growth of nickel-cobalt bisulfide(Ni Co S)nanosheets arrays on carbon cloth(CC)as supercapacitor electrodes is reported,involving deposition of two-dimensional metal-organic framework(MOF)precursors on the CC skeletons,conversion of MOF into nickel-cobalt layered double-hydroxide by ion exchange process and formation of Ni Co S by a sulfidation *** Ni Co S nanosheets with rough surface and porous structures are uniformly anchored on the CC *** unique architecture endows the composite(Ni Co S/CC)with abundant accessible active ***,robust electrical/mechanical joint between the nanosheets and the substrates is attained,leading to the improved electrochemical ***,an asymmetric supercapacitor device is constructed by using Ni Co S/CC and activated carbon as a positive electrode and a negative electrode,*** optimized device exhibits a high specific capacitance,large energy density and long cycle *** Ni Co S/CC electrode with intriguing electrochemical properties and mechanical flexibility holds great prospect for next-generation wearable devices.

关键词： Metal-organic framework Nickel sulfide Cobalt sulfide Carbon cloth Supercapacitor

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Surface Roughening of Sio2 Filler to Enhance the High-Frequency Dielectric and Thermal Properties of Sio2/Ptfe Composites

SSRN

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SSRN 2022年

作者： Li, Xin Zhou, Jing Shen, Jie He, Wenhao Yu, Yuanying Li, Qiangzhi Chen, Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

Low dielectric constant (Εr), low dielectric loss (tan δ), and low coefficient of thermal expansion (CTE) are necessary for polytetrafluoroethylene (PTFE)-based composites in high-frequency applications. In this paper, we construct the rough structure on the SiO2 filler surface to enhance the performance of SiO2/PTFE composites through a physical interaction way without coupling agents. The microstructure, interfacial combination, dielectric, and thermal properties of SiO2/PTFE composites were systematically investigated using the rough surface SiO2 (rSiO2). The results show that rSiO2 has a superior interfacial combination with PTFE than the smooth surface SiO2 (sSiO2), and the rSiO2 is more uniformly dispersed in the PTFE matrix, these result in a decrease in tan δ and CTE of the rSiO2/PTFE composites from 2.07–4.89 × 10-3, 80 ppm/°C for sSiO2/PTFE to 1.41–3.38 × 10-3, 67 ppm/°C (10–38 GHz). Meanwhile, the rSiO2/PTFE composites are kept in the low Εr (about 2.40, at 38 GHz). The rSiO2/PTFE composites possess excellent dielectric and thermal properties, making it promising for higher frequency applications. © 2022, The Authors. All rights reserved.

关键词： Silica

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Binder-free electrodes for advanced potassium-ion batteries:A review

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Chinese Chemical Letters 2021年第4期32卷 1299-1308页

作者： Wencong Liu Wenyi Liu Yuqi Jiang Qiuyue Gui Deliang Ba Yuanyuan Li Jinping Liu School of Chemistry Chemical Engineering and Life ScienceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal University.Harbin 150025China

Potassium-ion batteries(PIBs)have attracted enormous attention due to the abundance of potassium resources,low cost,fast ionic conductivity of electrolyte and relatively high operating *** great effo rts and progress,researches on PIBs are still at the initial stage,especially in the emerging field of flexible and wearable *** inevitable challenges for PIBs include low reversible capacity,unsatisfactory cycling stability and insufficient energy density,the solution to which mostly relies on designing adva nced ***-free electrodes have emerged as promising electrode architecture for *** electrodes avoid the use of insulating binders,which can be designed with various synergistic functional materials to address the aforementioned PIB issues and be endowed with flexibility/*** this review,we mainly summarize the recent progress on binde r-free electrodes for PIBs,with the focus on the methodologies,detailed strategies and functional materials for electrode *** strategy for binder-free electrodes is to assemble free-standing architecture with the help of carbon nanotubes(CNTs),graphitic fibers,and other carbon or mechanically robust materials,either alone or in *** other effective strategy is current collector substrate-assisted direct growth,including the use of carbon cloth,*** and other conductive ***,challenges and research opportunities are put forward at the end as the guidance for future development of binder-free PIB devices.

关键词： Binder-free Free-standing electrode Substrate-assisted directly grown electrode Potassium-ion battery Flexible device

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Change in elastic properties during room-temperature aging in body-centered cubic Mg-Li and Mg-Li-Al single crystals

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Journal of materials Science & technology 2022年第14期109卷 49-53页

作者： Ruxia Liu Shota Higashino Koji Hagihara Lianmeng Zhang Tohru Sekino Masakazu Tane SANKEN(The Institute of Scientific and Industrial Research) Osaka University8-1 MihogaokaIbarakiOsaka 567-0047Japan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China Graduate School of Engineering Osaka City University3-3-138 SugimotoOsaka558-8585Japan Department of Physical Science and Engineering Nagoya Institute of TechnologyNagoya 466-8555Japan

Biodegradable materials,with many advantages over conventionally used non-biodegradable materials,have received much attention owing to the elimination of the need for a secondary surgery for the removal of implants after *** with other biodegradable ceramics and/or polymers,Mg alloys are considered to be the most promising biodegradable orthopedic materials because they feature not only high specific strength and compressive yield strength but also a low Young’s modulus,which is comparable to that of human bones(10-30 GPa)[1,2].

关键词： strength aging alloys

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