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A Novel NASICON‑Type Na_(3.5)MnCr_(0.5)Ti_(0.5)(PO_(4))_(3)Nanofiber with Multi‑electron Reaction for High‑Performance Sodium‑Ion Batteries

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advanced Fiber materials 2024年第2期6卷 561-569页

作者： Ting Zhu Wei Liu Xiaobin Liao Mengyao Wang Hao Fan Zihe Wei Congcong Cai Liyan Yang Mufang Li Dong Wang Ping Hu Xuanpeng Wang Key Laboratory of Textile Fiber and Products Ministry of EducationHubei International Scientific and Technological Cooperation Base of Intelligent TextileMaterials&ApplicationWuhan Textile UniversityWuhan 430200China Hubei Key Laboratory of Micro‑Nanoelectronic Materials and Devices School of MicroelectronicsHubei UniversityWuhan 430062China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Physical Science&Technology School of ScienceWuhan University of TechnologyWuhan 430070China Hubei Longzhong Laboratory Wuhan University of Technology(Xiangyang Demonstration Zone)Xiangyang 441000China

Sodium superionic conductors(NASICONs)show significant promise for application in the development of cathodes for sodium-ion batteries(SIBs).However,it remains a major challenge to develop the desired multi-electron reaction cathode with a high specific capacity and energy ***,we report a novel NASICON-type Na_(3.5)MnCr_(0.5)Ti_(0.5)(PO_(4))_(3)cathode obtained by combining electrospinning and stepwise sintering *** cathode exhibits a high discharge capacity of 160.4 mAh g^(−1)and operates at a considerable medium voltage of 3.2 *** Na_(3.5)MnCr_(0.5)Ti_(0.5)(PO_(4))_(3)cathode undergoes a multi-electron redox reaction involving the Cr^(3+/4+)(4.40/4.31 V ***/Na^(+)),Mn^(3+/4+)(4.18/4.03 V),Mn^(2+/3+)(3.74/3.41 V),and Ti^(3+/4+)(2.04/2.14 V)redox *** redox reaction enables a three-electron transfer during the Na+intercalation/de-intercalation *** a result,the Na_(3.5)MnCr_(0.5)Ti_(0.5)(PO_(4))_(3)demonstrates a significant enhancement in energy density,surpassing other recently reported SIB *** highly reversible structure evolution and small volume changes during cycling were demonstrated with in-situ X-ray diffraction,ensuring outstanding cyclability with 77%capacity retention after 500 ***,a NMCTP@C//Sb@C full battery was fabricated,which delivered a high energy density of 421 Wh kg−1 and exhibited good cyclability with 75.7%capacity retention after 100 *** rational design of composition regulation with multi-metal ion substitution holds the potential to unlock new possibilities in achieving high-performance SIBs.

关键词： Sodium-ion battery NASICON structure Na_(3.5)MnCr_(0.5)Ti_(0.5)(PO_(4))_(3)nanofiber Ex/in-situ characterization Multi-electron reaction

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Hierarchical Microstructure and Strengthening Mechanism of Haynes 188 Alloy Manufactured by Laser Powder Bed Fusion

SSRN

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SSRN 2022年

作者： Liu, Yang Huang, Zhifeng Zhang, Chi Lu, Jiaqi Ouyang, Ni Shen, Qiang Chen, Fei State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Co and Ni superalloys have been widely used in aerospace. Abundant studies have been focused on additive manufacturing of Ni superalloys. However, the equally important Co superalloy has less been fabricated by additive manufacturing. In this work, Haynes 188 alloy, a kind of Co-based superalloy, is fabricated by using laser powder bed fusion. The microstructure and mechanical properties before and after a stress relief treatment of the additive manufactured Haynes 188 alloys are investigated in detail. For as-built alloys without stress relief treatment, the thermodynamic modeling predicts that a phase of M 6 C exists in the specimen, which is confirmed by a TEM EDS mapping result. Arrayed stacking faults, dislocations, and M 6 C precipitations are widely found inside grains of the specimen without stress relief treatment. The yield strength and elongation of the specimen without stress relief treatment are 645 MPa and 57.3%, respectively. For the specimen with stress relief treatment, the dislocation density is reduced, the carbide precipitations are dissolved into the matrix, and stacking faults are arrayed near grain boundaries. As a result, the yield strength slightly decreases to 485 MPa but the elongation increases to 68.1%. The mechanical properties of fabricated Haynes 188 alloys in this work are superior to that of the published Ni or Co superalloys. This work provides an effective method to improve the mechanical properties of Co superalloys by additive manufacturing, which is important for the development of high-performance superalloys and their manufacturing methods. © 2022, The Authors. All rights reserved.

关键词： Superalloys

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Enhancing the Combustion Properties of Interface Optimized Metastable Intermixed Composites Pvdf/Μ-Al by Noncovalently Functionalized Graphene

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SSRN 2022年

作者： Shen, Qiang Yi, Zhuoran Deng, Haoyuan Qin, Mei Sun, Yi Luo, Guoqiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Energetic metastable intermixed composites (MICs) consisting of polyvinylidene fluoride (PVDF) and fuels aluminum (Al) have the potential to be used as propellants and explosives. Our study introduced SPEEK-modified graphene (SPG) prepared by non-covalent modification of sulfonated poly(ether-ether-ketone) (SPEEK) into PVDF/Al to improve its energy release. The optimized interface generated by the interaction between SO3H groups of SPG layer and CF2 dipoles of PVDF layer integrates graphene onto the surface of PVDF/Al particles. Due to the effect of graphene on the interfacial thermal resistance, the enthalpy of SPG coated PVDF/Al particles is about 1.5 times higher than that of uncoated particles. The existence of SPG improves the heat transfer efficiency of MICs. For comparison, reduced graphene oxide (RGO) has also been introduced as an additive. Graphene is introduced to linearly affect(R2=0.9865) the main oxidation enthalpy by lifting the surface oxidation heat release of the Al core. Therefore, graphene is a new strategy for increasing the energy release rate while improving the energy output. © 2022, The Authors. All rights reserved.

关键词： Graphene

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Ultrafine Grain Tungsten Heavy Alloys with Excellent Performance Prepared by Spark Plasma Sintering

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Journal of Wuhan University of technology(materials Science) 2020年第2期35卷 393-398页

作者： ZHANG Jingang WANG Weimin JI Wei HE Qianglong WANG Aiyang TAN Lin YANG Kai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Institute of Material Science and EngineeringWuhan University of TechnologyWuhan 430070China

Ultrafine grain tungsten heavy alloys (WHAs) were successfully produced from the nano-crystalline powders using spark plasma *** present study mainly discussed the effects of sintering temperature on the density,microstructure and mechanical properties of the *** relative density of 98.12% was obtained at 1 050 ℃,and the tungsten grain size is about 871 *** 1 000 ℃-1 200 ℃,the mechanical properties of the alloys tend to first rise and then goes *** SPS,the alloy exhibits improved hardness (84.3 HRA at 1 050 ℃) and bending strength (987.16 MPa at 1 100 ℃),due to the ultrafine-grained *** fracture mode after bending tests is mainly characterized as intergranular or intragranular fracture of W grains,interfacial debonding of W grains-binding phase and ductile tearing of binding *** EDS analysis reveals a certain proportion of solid solution between W and Ni-Fe binding *** good mechanical properties of the alloys can be attributed to grain refinement and solid solution strengthening.

关键词： tungsten heavy alloys ultrafine grain nano-crystalline powders solid solution strengthening spark plasma sintering

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Development of Phase-Field Modeling in materials Science in China:A Review

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Acta Metallurgica Sinica(English Letters) 2023年第11期36卷 1749-1775页

作者： Yuhong Zhao Hui Xing Lijun Zhang Houbing Huang Dongke Sun Xianglei Dong Yongxing Shen Jincheng Wang Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Shaanxi Basic Discipline(Liquid Physics)Research CenterNorthwestern Polytechnical UniversityXi’an710129China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing211189China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai200240China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an710072China School of Materials Science and Engineering Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-Performance Al/Mg Alloy MaterialsNorth University of ChinaTaiyuan030051China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang110004China

Phase-field method,as a powerful and popular approach to predict the mesoscale microstructure evolution in various materials science,provides a bridge from atomic-scale methods to the macroscale and has been widely used at an ever-increasing *** paper aims to briefly review the origin,basic idea,and development of phase-field models in a historical *** focus is placed on the classical and state-of-the-art applications in China,including liquid–solid,solid–solid,gas–solid,ferroelectrics/ferromagnetics phase transformation,and crack *** introducing the academic activities in the phase-field community in China,some suggestions for the future development directions of phase-field method are finally mentioned.

关键词： Phase-field method Microstructure Phase transformation Various materials design

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Effect of trace Ni addition on microstructure,mechanical and corrosion properties of the extruded Mg-Gd-Y-Zr-Ni alloys for dissoluble fracturing tools

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Journal of Magnesium and Alloys 2021年第5期9卷 1649-1660页

作者： J.Wang T.Li H.X.Li Y.Z.Ma K.N.Zhao C.L.Yang J.S.Zhang State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Department of Petroleum Equipment of RIPED PetroChinaBeijing 100083China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi'an 710072China

Magnesium alloys,a novel functional material for the fabrication of fracturing tools,are being paid more and more attentions recently due to their relatively high mechanical properties and fast dissolubility ability after *** this study,the novel extruded Mg-10Gd-3Y-0.3Zr-xNi alloys will be reported and their microstructure,mechanical and corrosion behaviors will be also *** results show that Ni contents influence phase precipitation *** adding 0.2 wt%Ni,a large amount of Zr_(7)Ni_(10)phases will be precipitated insidesα-Mg matrix,directly leading to degradation of strength and large corrosion *** further increasing Ni contents,the precipitation phases can be changed from Mg_(5)RE to 18R-LPSO structure,resulting in higher mechanical properties and faster corrosion ***,adding Ni element also change the texture orientation by influencing the precipitation behavior of the *** alloys invented in this paper have attained the highest compressive and tensile properties among all the reported dissoluble magnesium *** work is beneficial in understanding the role of Ni in the magnesium alloys and provides more materials alternatives for the fabrication of dissoluble fracturing tools.

关键词： Dissoluble magnesium alloys Microstructure Mechanical properties Corrosion behaviors Fracturing tools

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Sequential hardening mechanisms in additive-manufactured NiTi shape memory alloys that can significantly delay compressive failure

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materials Today 2025年 87卷 36-48页

作者： Ma, Huwen Zhao, Yanchun Luo, Junhui Su, Yu Zheng, Tengfei Yu, Zhiqi Wu, Yuan Gao, Yanfei State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China School of Advanced Materials and Nanotechnology Xidian University Xian710071 China Department of Materials Science and Engineering University of Tennessee KnoxvilleTN37996 United States

Most material design strategies devoted to the strength-ductility synergy in tension are based on the delay of the necking instability. However, the counterpart investigations under compression remain elusive. Recent developments in simulating the failure process reveal that microscopic voids or cavities under compression/shear-dominated loadings will evolve sequentially as flattened to a micro-crack, rotating and elongating into kinks, and then interacting and coalescing with neighboring micro-cracks. This entire process can be significantly slowed down if the matrix material sustains a high work hardening exponent. Motivated by this novel micromechanical understanding, this work successfully realized hierarchically heterostructured microstructures in NiTi shape memory alloys (SMA) by using the selective laser melting (SLM) additive manufacturing technique. It is the sequential or progressive transition from the martensitic phase transformation, to heterogeneous deformation induced hardening, and then to amorphous lamellae hardening at later stage that sustains a high work hardening rate which results into an exceptionally high failure strain of the as-fabricated (without post-treatment) SMA under compression. The occurrence of amorphization at high strains is attributed to the high dislocation density and to the oxygen-assisted energy barrier reduction. This work thus offers an unprecedent design approach for the development of high performance SMAs. © 2025 Elsevier Ltd

关键词： Strain hardening

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Large‑scale Fabrication of Snake‑skin‑inspired Protective Composite Textiles

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advanced Fiber materials 2024年第4期6卷 978-992页

作者： Qing Liu Fengxiang Chen Tingting Dong Woong‑Ryeol Yu Chaoyu Chen Gaoming Jiang Zhijia Dong Pibo Ma Engineering Research Center of Knitting Technology Ministry of EducationCollege of Textile Science and EngineeringJiangnan UniversityWuxi 214122P.R.China State Key Laboratory of New Textile Materials and Advanced Processing Technologies/National Local Joint Laboratory for Advanced Textile Processing and Clean Production/Hubei Key Laboratory of Digital Textile Equipment Wuhan Textile UniversityWuhan 430200P.R.China Department of Materials Science and Engineering and Research Institute of Advanced Materials Seoul National UniversitySeoul 08826Republic of Korea

Inspired by the overlapping structure of snake scales,a reinforced scale-like knitted fabric(R-SLKF)was created in this *** achieve this,short carbon fibers in an epoxy resin(ER)matrix were incorporated into the scales of an *** resulting textile is a highly stable protective composite that is flexible,warm,and thermally *** addition,supe-rior stab-resistance is ensured through rigid protective blocks in the R-SLKF,making up a hard overlapping scale region,besides satisfactory flexibility via soft twisted ultra-high-molecular-weight polyethylene yarn-based *** R-SLKF achieves high stab resistance(peak load of approximately 600 N for a single scale thickness of 2 mm),good flexibility(~290 mN cm),and breathability(100 MPa,423 mm/s),coupled with good warmth retention and thermal insulation prop-erties(0.28℃/s),which are superior to previously reported protective composite *** the results,the combination of desirable individual protection,excellent wearability and comfort enables human beings to survive in extremely danger-ous *** element simulations provided valuable insights into the factors influencing the stab resistance of R-SLKF and elucidated the underlying anti-puncture mechanism in accordance with the experimental *** study presents a novel strategy for the facile industrial fabrication of flexible and lightweight protective composite textiles,which is expected to enhance the structure and material design for future innovations and provide advantages for personal protec-tive equipment in various industrial fields.

关键词： Scale-like knitted fabric Stab-resistance Flexibility Air permeability Warmth retention and thermal insulation properties

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Enhancing energy density of poly(vinylidene fluoride) composite film via addition of N-doped carbon modified boron nitride and sandwich-structural engineering

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Applied Surface Science 2023年 640卷

作者： Huang, Huabo Mei, Wentao Wang, Yucong Huang, Juan Li, Liang Ji, Jiayou Xiong, Chuanxi Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Key Laboratory for Green Chemical Process of Ministry of Education School of Materials Science and Engineering Wuhan Institute of Technology Wuhan430205 China Key Laboratory of Green Processing and Functional New Textile Materials of Ministry of Education School of Textile Science and Engineering Wuhan Textile University Wuhan430200 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China

It is a challenge to simultaneously enhance dielectric constant and breakdown strength of dielectrics and achieve a greatly elevated energy density. Herein, polyaniline was first coated onto the surface of boron nitride nanosheets (BN), and then nitrogen-doped carbon (NC) was formed through a carburization process, resulting in BN@NC composite, which was subsequently added to poly(vinylidene fluoride) (PVDF) to prepare a composite film with high dielectric performance. The characterization showed that BN@NC effectively preserved the nanosheet structure of BN and formed strong hydrogen bonding interactions with the PVDF matrix, promoting the β-PVDF formation. This not only improved the compatibility but also enhanced the interfacial polarization between conductive NC and the polymer, leading to a high dielectric constant. Moreover, the electrically insulating BN prevented the formation of leakage current, resulting in a high breakdown strength. Finally, a sandwich-structured film was constructed, and exhibited a dielectric constant of 10.2 (at 1 kHz), a breakdown strength of 380 MV m−1, and an energy density of 6.1 J cm−3, which were 20%, 36%, and 74% higher, respectively, than those of pure PVDF film (8.5, 280 MV m−1, and 3.5 J cm−3). This work highlights significant potential for applications in low-cost and high-energy density dielectric composites. © 2023 Elsevier B.V.

关键词： Boron nitride

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Review of functionally graded materials processed by additive manufacturing

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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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