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Hardness-thermal stability synergy in nanograined Ni and Ni alloys:Superposition of nanotwin and low-energy columnar boundary

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Journal of materials Science & technology 2023年第6期137卷 123-131页

作者： F.H.Duan Y.Lin Q.Li J.H.Luan J.Lu J.Pan Y.Li Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Laboratory of Nanomaterials&Nanomechanics Department of Mechanical EngineeringCity University of Hong KongHong KongChina State Key Laboratory of Material Processing and Die&Mould Technology and School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Department of Materials Science and Engineering City University of Hong KongHong KongChina Centre for Advanced Structural Materials Greater Bay Joint DivisionShenyang National Laboratory for Materials ScienceCity University of Hong Kong Shenzhen Research InstituteShenzhen 518057China City U-Shenzhen Futian Research Institute Shenzhen 518045China

Refining grains into nanoscale can significantly strengthen and harden metallic materials;however,nanograined metals generally exhibit low thermal stability,hindering their practical *** this work,we exploit the superposition of the contribution of nanotwins,low-angle grain boundaries,and microalloying to tailor superior combinations of high hardness and good thermal stability in Ni and Ni *** the nanotwinned Ni having a twin thickness of∼2.9 nm and grain size of 28 nm,it exhibits a hardness over 8.0 GPa and an onset coarsening temperature of 623 K,both of which are well above those of nanograined ***/Mo microalloying can further improve the onset coarsening temperature to 773 K without comprising *** analyses reveal that high hardness is achieved via strengthen-ing offered by extremely fine ***,the superior thermal stability is mainly ascribed to the low driving force for grain growth induced by the low-angle columnar boundary architecture and to the additional pinning effect on the migration of twin/columnar boundaries provided by minor Re/Mo *** present work not only reveals a family of nanotwinned metals possessing the combination of ultra-high hardness and high thermal stability but also provides a strategy for tailoring properties of metallic materials by pairing low-angle grain boundaries and twin boundaries.

关键词： Nanotwin Thermal stability Hardness Low-angle grain boundary Microalloying

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Hierarchy in materials for maximized efficiency

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国家科学评论（英文版） 2020年第11期7卷 1626-1630页

作者： Li-Hua Chen Yu Li Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology China Laboratory of Inorganic Materials Chemistry University of Namur Belgium

HIERARCHY Hierarchy, originated from an ancient Greek word'εραρχα', is a property characterized by the arrangement of a set of individual items [1] that are placed 'above','below'or'a...

HIERARCHY Hierarchy, originated from an ancient Greek word'εραρχα', is a property characterized by the arrangement of a set of individual items [1] that are placed 'above','below'or'at the same level as' one another in different *** items can be physical matter such as atoms, molecules, particles, objects, etc., or can be abstract and intangible entities such as names, values, categories, ***, although we are not consciously aware of its existence, is an essential concept in a wide variety of fields, such as life science, materials science, computer science, philosophy, mathematics, physics,chemistry, biology, geography, topography, organizational theory, systems theory, architecture, urban construction, industrial processes and the social sciences.

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Articular cartilage and osteochondral tissue engineering techniques:Recent advances and challenges

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Bioactive materials 2021年第12期6卷 4830-4855页

作者： Wenying Wei Honglian Dai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Biomedical Materials and Engineering Research Center of Hubei ProvinceWuhan University of TechnologyWuhan430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan528200China

In spite of the considerable achievements in the field of regenerative medicine in the past several decades,osteochondral defect regeneration remains a challenging issue among diseases in the musculoskeletal system because of the spatial complexity of osteochondral units in composition,structure and *** order to repair the hierarchical tissue involving different layers of articular cartilage,cartilage-bone interface and subchondral bone,traditional clinical treatments including palliative and reparative methods have showed certain improvement in pain relief and defect *** is the development of tissue engineering that has provided more promising results in regenerating neo-tissues with comparable compositional,structural and functional characteristics to the native osteochondral *** in this review,some basic knowledge of the osteochondral units including the anatomical structure and composition,the defect classification and clinical treatments will be first *** we will highlight the recent progress in osteochondral tissue engineering from perspectives of scaffold design,cell encapsulation and signaling factor incorporation including bioreactor *** products for osteochondral defect repair will be analyzed and summarized ***,we will discuss the current obstacles and future directions to regenerate the damaged osteochondral tissues.

关键词： Osteochondral tissue engineering Cartilage tissue engineering Gradient scaffold Bioreactors

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Scalable Assembly of Layered Dielectric Nanocomposites Filled with Perovskite Nanosheets for Flexible Electronics

SSRN

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SSRN 2024年

作者： Fu, Si Ren, Lele Wang, Jian Liu, Hexing Zhang, Pengchao Shen, Zhonghui Zhang, Xin Tu, Rong Zhang, Song Nan, Ce-Wen Li, Bao-Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China State Key Lab of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing100084 China

Polymer-based dielectrics have attracted much attention in the field of flexible electronics due to their excellent flexibility, dielectric and mechanical properties. However, the rational design of nanofiller-polymer nanocomposite for improving dielectric and mechanical properties remains challenging. Herein, layered nanocomposites filled with high-κ Ca2Nb3O10 perovskite nanosheets were fabricated via shear-flow induced alignment of nanosheets. The hierarchical structure and good dispersion of nanosheets endowed the layered nanocomposites with an outstanding modulus of 12.7 GPa and toughness of 1.8 MJ/m3. Meanwhile, the layered nanocomposites exhibited a high dielectric constant of 14.7, a low dielectric loss of 4.2%, and low leakage current density -7 A/cm2. The layered high-κ nanocomposites designed in this work will have broad application prospects in th flexible electronics. © 2024, The Authors. All rights reserved.

关键词： Perovskite

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Bending and Vibration Analysis of Multi-Directional Functionally Graded Thick Plates Described by Trigonometric Functions Via a Novel Third-Order Shear Deformation Theory and Isogeometric Analysis

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SSRN 2023年

作者： Chen, Fei Zhao, Xiaofei Huang, Zhifeng Lei, Jun Zhang, Chi Wen, Pin Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Xiangyang441000 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics School of Science Wuhan University of Technology Wuhan430070 China Department of Engineering Mechanics Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing China

This paper introduces a material model for a multi-directional functionally graded plate described by trigonometric functions, equipped with four parameters to control diverse material distributions effectively. The bending and vibration analysis of multi-directional functionally graded plates is carried out utilizing the Isogeometric Analysis, which is based on a novel third-order shear deformation theory (TSDT) to account for transverse shear deformation. The present TSDT, founded on a rigorous kinematic of displacements, is demonstrated to surpass other preceding theories. It is derived from an elasticity formulation, rather than relying on the hypothesis of displacements. The effectiveness of the proposed method is verified by comparing its numerical results with those of other methods reported in the relevant literature. Numerical examples are presented and discussed, in which the effects of gradient parameters, periodic parameter, length-to-thickness ratio, and boundary conditions on deflection, stress, and natural frequencies are investigated. © 2023, The Authors. All rights reserved.

关键词： Vibration analysis

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Durotaxis and Topotaxis Orchestrated Guidance on Cell Migration in 3D Printed Scaffold/Hydrogel Composite

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Additive Manufacturing Frontiers 2024年第2期3卷 224-231页

作者： Baichuan Deng Zhiwei Huang Xianglin Zhang Kai Ren Wen Feng Lu Jerry Ying Hsi Fuh Xinghuang Liu Tao Bai Bin Wu State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou310027China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou310027China Department of Mechanical Engineering National University of SingaporeSingapore117575Singapore Division of Gastroenterology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430022China

Printing three-dimensional(3D)scaffolds with suitable mechanical cues is an effective strategy for guiding tissue regeneration by inducing cell migration and ***,many studies considered only one type of cue for 3D tissue engineering scaffold fabrication,such as topological cues,which is *** realize durotaxis-and topotaxis-orchestrated guidance on cell migration,a 3D printed scaffold/hydrogel composite was fabricated in this *** porous scaffold provided a topological cue(topotaxis),and the combined hydrogel provided a compliance cue(durotaxis).The results indicated that the thin fibers of the scaffold induced cell migration,and the larger pore size and directed fiber number of the scaffold led to more uniform cell orientation(topotaxis).Furthermore,when collagen was cured to cover the scaffold to result in a compliance change,the cells in the collagen still sensed the scaffold topological cue and migrated along it(durotaxis).Collagen also provides a living space and nutrition for cells,thereby significantly increasing their *** effects of durotaxis and topotaxis synthesis provide a promising solution for tissue engineering scaffold applications.

关键词： Tissue engineering scaffold Topological cue Compliance cue Cell migration

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3D-Printed Superhydrophobic and Magnetic Device That Can Self-Powered Sense A Tiny Droplet Impact

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Engineering 2022年第8期8卷 196-205页

作者： Xuan Zhang Qi Wang Ruiping Zou Bo Song Chunze Yan Yusheng Shi Bin Su State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China ARC Research Hub for Computational Particle Technology Department of Chemical EngineeringMonash UniversityClayton VIC 3800Australia

Three-dimensional(3D)-printed magnetic soft architectures have attracted extensive attention and research from the engineering and material *** force-driven shape deformation of such architectures causes a change in the magnetic field distribution,indicating the capability to convert mechanical energy to ***,we fabricate a flexible superhydrophobic and magnetic device by integrating two kinds of 3D printing *** 3D-printed magnetic device(3DMD)exhibits a long-term stable mechanoelectrical conversion capacity under consecutive water droplet *** output current of the 3DMD is higher than that of records in the existing *** with Maxwell numerical simulation,the mechanoelectrical conversion mechanism of the 3DMD is investigated,further guiding regulation of the diverse ***,three 3DMDs are integrated to light up a commercial light-emitting diode(LED)by a stream of collected *** a combined design incorporating energy conversion is believed to promisingly motive advances in the 3D printing field.

关键词： 3D printing Self-powered sensing Magnetic Waterdrops

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Transmittance improvement and photocatalyst performance of complex environment tolerant SiO2-TiO2 thin film on photovoltaic glass

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Ceramics International 2025年

作者： Liu, Jiacheng Zhang, Mengya Zhang, Jihong Zhang, Qinghuang Han, Jianjun Xie, Jun Cao, Shaowen State Key Laboratory of Silicate Materials for Architectures Wuhan University of Technology 122 Luoshi Road Hongshan Hubei Wuhan430070 China Hepu Research Center for Silicate Materials Industry Technology 27 Huanzhu Avenue Hepu County Beihai536100 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Hongshan Hubei Wuhan430070 China

The transmittance and surface condition of photovoltaic cover glass determine the energy conversion efficiency of specific solar cells modulus. In this study, TiO2-SiO2 based complex thin film were fabricated on PV glass and the transmittance, self-cleaning, and environmental tolerance performances were investigated. TiO2-SiO2 based precursors with different SiO2 contents and additives were prepared using sol-gel method, and coated on photovoltaic glass substrates by spin-coating technique with optimized parameters for thin film fabrication. The microstructure analysis reveals the decreasing rutile TiO2 crystalline with higher SiO2 content in thin film probably due to lower TiO2 content and the formation of Ti-O-Si bond, which impedes TiO2 crystal growth. The morphologies and elements distribution of thin film proves the formation of SiO2/TiO2 core-shell like structure in thin film. The transmittance of coated photovoltaic glass in visible range is improved from 91.60 % to 93.94 %, with optimized TiO2/SiO2 ratio. Accordingly, the monocrystalline silicon solar cell conversion efficiency increases from 16.35 % to 16.68 %, about 0.33 % efficiency increase due to TiO2-SiO2 thin film coating. In addition, the thin film shows excellent photocatalyst behavior from 95.40 % methylene blue dye degradation rate under Xeon lamp irradiation, and super hydrophilic property from 0° contact angle, which confirms the excellent self-cleaning performance. The transmittance of coated photovoltaic glass recovers from less than 80 % with MB simulated pollutant contamination, to 92.97 % after degradation under Xeon lamp irradiation, and the solar cell conversion efficiency changes from 13.15 % to 16.55 %. In addition, the transmittance and solar cell conversion remain almost unchanged after low temperature freezing, and slightly decrease from first time sand scrubbing then keep stable with more cycles. The results indicate the excellent anti-pollution, low temperature tolerance, and wear

关键词： Energy conversion efficiency

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Machine Learning Assisted Design of Natural Rubber Composites with Multi⁃Performance Optimization

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Journal of Harbin Institute of technology(New Series) 2023年第1期30卷 35-51页

作者： Song Pang Yang Yu Huanhuan Liu Youping Wu State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials Beijing University of Chemical TechnologyBeijing 100029China Beijing Engineering Research Center of Advanced Elastomers Beijing University of Chemical TechnologyBeijing 100029China

Multi⁃performance optimization of tread rubber composites is a key issue of great concern in automotive *** experimental design approach via“trial and error”or intuition is ineffective due to mutual inhibition among multiple properties.A“Uniform design⁃Machine learning”strategy for performance prediction and multi⁃performance optimization of tread rubber composites was *** wear resistance,rolling resistance,tensile strength and wet skid resistance were simultaneously optimized.A series of feasible optimization designs were screened via statistical analysis and machine learning analysis,and were experimentally *** verification experiments demonstrate that the optimization design via machine learning analysis meets the optimization requirements of all target performance,especially for Akron abrasion and 60℃tanδ(about 21%and 9%lower than the design targets,respectively)due to the inhibition of mechanical degradation and good dispersion of fillers.

关键词： machine learning multi⁃performance optimization natural rubber wear resistance

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TiNB 0.8O 4 Microspheres with Pseudocapacitive Properties for Fast-Charging and Durable Sodium Storage

SSRN

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SSRN 2024年

作者： Li, Xinyuan Zhang, Tianyi Chen, Zhuo Fan, Hao Hu, Ping Cai, Congcong Zhou, Liang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei Wuhan430070 China Hubei Longzhong Laboratory Wuhan University of Technology Xiangyang Demonstration Zone Hubei Xiangyang441000 China

Titanium niobium oxides (TNO) are promising anode materials for sodium-ion batteries (SIBs) due to their efficient ion diffusion channels. However, their poor electronic conductivity and severe volume expansion during Na+ (de-)intercalation impede the longevity of SIBs. To address these issues, the core@shell TiNb0.8O4/C@C microspheres (TNO/C@C) have been developed to enhance electron conduction and Na+ diffusion. The TNO/C@C, featuring a dual conductive configuration, outperforms pure TNO and other variations like TNO/C and TNO@C that rely solely on either bulk or surface electronic conductors. Thus, the TNO/C@C anode material achieves a fast-charging rate of 200 C, allowing full charging in 2 seconds, and demonstrates long-term stability over 5000 cycles. In-situ Raman analysis reveals a zero-strain feature during sodiation/desodiation, which minimizes structural degradation over repeated cycles. In-situ EIS test indicates low electron resistance, enhancing both the rate capability and stability. Therefore, the bulk and surface dual conducting strategy offers new insights into robust and fast-charging SIBs. © 2024, The Authors. All rights reserved.

关键词： Sodium-ion batteries

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