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Bioinspired Centimeter-scale Sensor Free Obstacle-passing Robots with a Wireless Control System

Journal of Bionic Engineering 2022年第4期19卷 953-964页

作者： Longxin Kan Zhenhua Wu Bo Song Bin Su Yusheng Shi State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

Obstacle avoidance is of great importance for mobile robots since it provides protection for the robots’safety and ensures their routine *** are proven to play an important role in robots obstacle avoidance,and they are useful as ***,more sensors indicating additional space,larger weight load and more energy *** unnecessary sensors is conducive to the development of mobile robots and remains *** we demonstrate Sensor Free Obstacle-Passing Robots(SFOPRs)inspired by flies using the Obstacle-passing strategy instead of Obstacle *** ability to autonomously adjust its direction after hitting obstacles and the ability to continuously hit obstacles are 2 key problems that need to be solved to build this *** to arc-shaped head design and undulating motion behaviors,the robots can autonomously adjust their direction to the outline of obstacles,such as a 90°corner,dispersive irregular obstacles,and even an"S"type channel without the assistance of any ***,the caterpillar-like movement enables robots to continuously hit ***,collaborative awareness and mutual aid can be realized among two or more prototype robots,indicating simple yet functional units for future swarm *** study could provide a new strategy to pursue sensor-free obstacle-passing robots for future swarm robot applications.

关键词： Bioinspired Sensor Obstacle Swarm robots Untethered

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Full-Scaling Friction and Wear Laws of Nanotwinned Metals

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Physical Review Letters 2025年第16期134卷 166201-166201页

作者： Yan Lin Ziyue Zhang Fenghui Duan Fangming Wang Fei Liang Qicheng Zhang Yong Li Jie Pan Keke Chang Yonghao Zhao Yuntian Zhu Xiang Chen Nano and Heterogeneous Materials Center School of Materials Science and Engineering Nanjing University of Science and Technology Nanjing China Department of Materials Science and Engineering City University of Hong Kong Hong Kong China State Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo China State Key Laboratory of Material Processing and Die and Mould Technology and School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan China School of Materials Science and Engineering Hohai University Changzhou China

Ultrastrong nanotwinned (NT) metals hold promise for mitigating friction and wear—essential for enhancing the energy efficiency and longevity of all moving systems. However, optimizing their tribological performance has long suffered from the absence of friction and wear laws across varying tribological loading scales. Here, we have discovered full-scaling twin lamella spacing (λ)-dependent friction and wear laws in NT pure nickel and identified critical deformation mechanisms for reducing friction and wear. Nanoscale friction initially increases with decreasing λ, peaking at 20 nm, and then decreases due to a transition from dislocation-twin boundary interactions to detwinning. Under microscale loading, friction and wear reduce linearly with decreasing λ, attributed to an unforeseen phase transition from face-centered cubic to hexagonal close-packed structures. Furthermore, under macroscale loading, the formation of a durable oxide layer and a stable gradient nanostructure in nanotwinned nickel with λ exceeding 20 nm aids in mitigating wear loss.

关键词： Nickel

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Simultaneous Optimization of Power Factor and Thermal Conductivity towards High-Performance InSb-Based Thermoelectric materials

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Chinese Physics Letters 2021年第9期38卷 80-84页

作者： Wang Li Tian Xu Zheng Ma Abubakar-Yakubu Haruna Qing-Hui Jiang Yu-Bo Luo Jun-You Yang State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan 430074China

Thermoelectric performance of InSb is restricted by its low Seebeck coefficient and high thermal ***,CuCl is employed to optimize simultaneously the electrical and thermal transport properties of *** substitution of Cl for Sb results in enhanced electron effective mass,leading to high Seebeck coefficient of-159.9 μV/K and high power factor of 31.5 μW·cm^(-1)·K^(-2) at 733 K for InSb+5 wt% CuCl *** addition,CuCl doping creates hierarchical architectures composed of CugIn4,Sb,Cu2Sb in InSb,leading to a strengthened phonon scattering in a wide wavelength(i.e.,nano to meso scale),thus a low lattice thermal conductivity of 2.97 W·m^(-1)· K^(-1) at 733 K in InSb+5 wt% *** a result,a maximum ZT of 0.77 at 733 K has been achieved for the InSb+5 wt% CuCl sample,increasing by ~250% compared to pristine InSb.

关键词： InSb scattering Seebeck

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Unraveling the incompatibility mechanism of ethylene carbonate-based electrolytes in sodium metal anodes

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Journal of Energy Chemistry 2024年第7期94卷 560-567页

作者： Daomin Qin Fangyuan Cheng Meilian Cao Feiyang Yan Qian Wang Chun Fang Jiantao Han State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074HubeiChina

Ethylene carbonate(EC)is widely used in lithium-ion batteries due to its optimal overall performance with satisfactory conductivity,relatively stable solid electrolyte interphase(SEI),and wide electrochemical *** is also the most widely used electrolyte solvent in sodium ion ***,compared to lithium metal,sodium metal(Na)shows higher activity and reacts violently with EC-based electrolyte(NaPF_(6)as solute),which leads to the failure of sodium metal batteries(SMBs).Herein,we reveal the electrochemical instability mechanism of EC on sodium metal battery,and find that the com-bination of EC and NaPF_(6) is electrically reduced in sodium metal anode during charging,resulting in the reduction of the first coulombic efficiency,and the continuous consumption of electrolyte leads to the cell *** address the above issues,an additive modified linear carbonate-based electrolyte is provided as a substitute for EC based ***,ethyl methyl carbonate(EMC)and dimethyl carbon-ate(DMC)as solvents and fluoroethylene carbonate(FEC)as SEI-forming additive have been identified as the optimal solvent for NaFP_(6)based electrolyte and used in Na_(4)Fe_(3)(PO_(4))_(2)(P_(2)O_(7))/Na *** batter-ies exhibit excellent capacity retention rate of about 80%over 1000 cycles at a cut-off voltage of 4.3 V.

关键词： Na metal batteries Ethylene carbonate decomposition Na_(4)Fe_(3)(PO_(4))_(2)(P_(2)O_(7))cathode Interface engineering Ethylene carbonate-free electrolyte

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Approaching ohmic contact to two-dimensional semiconductors

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Science Bulletin 2019年第19期64卷 1426-1435页

作者： Kailang Liu Peng Luo Wei Han Sanjun Yang Shasha Zhou Huiqiao Li Tianyou Zhai State Key Laboratory of Material Processing and Die & Mould Technology School of Material Sciences and Engineering Huazhong University of Science and Technology

Two-dimensional semiconductors have attracted immense research interests owing to their intriguing properties and promising applications in electronic and optoelectronic ***,the performance of these devices is drastically hindered by the large Schottky barrier at the electric contact interface,which is hardly tunable due to the Fermi level pinning *** this review,we will analyze the root causes of the contact problems for the two-dimensional semiconductor devices and summarize the strategies on the basis of different contact geometries,aiming to lift out the Fermi level pinning effect and achieve the ohmic ***,the remarkable improvement of the device performance thanks to these optimized contacts will be *** the end,the merits and limitations of these strategies will be discussed as well,which potentially gives a guideline for handling the electric contact issues in two-dimensional semiconductors devices.

关键词： Two-dimensional semiconductor Ohmic contact Fermi level pinning Schottky barrier

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Effect of Y2O3-Al2O3 sintering additive content on the properties of porous Si3N4 ceramics prepared by digital light processing using Polymethyl methacrylate as pore-forming agent

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Ceramics International 2025年

作者： Wu, Ya-Ru Huang, Hai-Lu Tian, Chong Wu, Jia-Min Liu, Chun-Lei Guo, Lin Cai, Wei-Hao Yang, Ling-Hao Liu, Zhi-Wei Zhang, Yang-Ze Luo, Zhi-Cong Su, Sen Shi, Yu-Sheng State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan430074 China Engineering Research Center of Ceramic Materials for Additive Manufacturing Ministry of Education Wuhan430074 China Wenzhou Key Laboratory of Microwave Communication Materials and Devices Wenzhou Advanced Manufacturing Institute of HUST Wenzhou325035 China

Porous Si3N4 ceramics have been widely used in aerospace and military industry due to their excellent mechanical properties. Digital light processing (DLP) technology offers an effective route to prepare porous Si3N4 ceramics. In this paper, porous Si3N4 ceramics were successfully fabricated by DLP technology using Polymethyl methacrylate (PMMA) as pore-forming agent, and the effects of the sintering additive (Y2O3-Al2O3) content on the properties of Si3N4 ceramic slurry, green bodies and sintered parts were systematically studied. With the increase of sintering additive content from 2 wt% to 14 wt%, the viscosity of the Si3N4 slurry decreased and the cure depth of that increased. It was found that Y2O3 in sintering additives could induce the growth of β-Si3N4 grain and the fracture mode of Si3N4 ceramics changed from transgranular fracture to intergranular fracture gradually. Additionally, the porosity of porous Si3N4 ceramics first decreased and then increased, while the bulk density, flexural strength of the sintered samples first increased and then decreased with the increase of the sintering additive content. When the content of Y2O3-Al2O3 sintering additives was 10 wt%, the flexural strength of the Si3N4 ceramics reached the maximum value of 459.38 MPa. This research is of great significance for the mechanical property improvement of porous Si3N4 ceramics prepared by DLP. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Machinability

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Preparation and thermoelectric properties of p-type Bi_(0.52)Sb_(1.48)Te_3 + 3% Te thin films

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Chinese Science Bulletin 2012年第32期57卷 4220-4224页

作者： ZHANG JianSheng YANG JunYou FENG ShuangLong LIU ZhengLai PENG JiangYing State Key Laboratory of Material Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhan 430074China

Thin films of p-type Bi0.52Sb1.48Te3 + 3% Te were deposited on glass substrates by flash evaporation.X-ray diffraction and field-emission scanning electron microscopy were performed to characterize the thin films,and the effects of preparation and annealing parameters on the thermoelectric properties were *** was shown that the power factors of the films increased with increasing deposition *** the as-deposited films improved the power factors when the annealing time was less than 90 min and the annealing temperature was lower than 250℃.A maximum power factor of 10.66 μW cm-1 K-2 was obtained when the film was deposited at 200℃ and annealed at 250℃ for 60 min.

关键词：薄膜热电特性 p型制备扫描电子显微镜沉积温度 X-射线衍射退火时间

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Enhanced mechanical performance via Al2O3 whisker reinforcing and microwave sintering in 3Y-TZP ceramics

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Ceramics International 2025年

作者： Wang, Chuanmin Lu, Ya Ma, Weigang Zhou, Xinyi Liu, Jinpeng Xiao, Jianzhong Guo, Xin Song, Yijing Ye, Sixian Tran, Nguyen-Minh-An Tan, Hua Zhang, Haibo School of Materials Science and Engineering State Key Laboratory of Material Processing and Die & Mould Technology Huazhong University of Science and Technology Wuhan430074 China School of Mechanical Science & Engineering Huazhong University of Science and Technology Wuhan430074 China Guangdong HUST Industrial Technology Research Institute Dongguan523808 China Faculty of Chemical Engineering Industrial University of Ho Chi Minh City Ho Chi Minh City71420 Viet Nam

To improve the hardness, fracture toughness, and overall mechanical properties of 3Y-TZP ceramics, Al2O3 whiskers were introduced as reinforcing phases. Composite ceramics containing 0.5, 1.0, 1.5, and 2.0 wt% Al2O3 whiskers were fabricated using microwave sintering at 1450 and 1500 °C. The heating rates ranging from 8.3 to 40 °C/min and a holding time of 180 min, following cold isostatic pressing at 200 MPa. The densification behavior, microstructural evolution, and toughening mechanisms were systematically analyzed using scanning electron microscopy, X-ray diffraction, and Vickers indentation. Microwave sintering achieved a relative density of 99.46 ± 0.12 % at 1500 °C with 2.0 wt% Al2O3 whiskers, while phase analysis confirmed the retention of tetragonal zirconia. Compared with conventional sintering, microwave sintering produced finer grain sizes, reducing the average from 566.0 ± 131.0 nm to 400.3 ± 119.3 nm. The incorporation of 2.0 wt% Al2O3 whiskers enhanced mechanical properties, yielding a Vickers hardness of 15.1 ± 0.3 GPa and a fracture toughness of 7.72 ± 0.15 MPa m1/2. The high elastic modulus and elongated morphology of Al2O3 whiskers contributed to toughening through crack deflection, whisker bridging, and whisker penetration, leading to a mixed fracture mode of transgranular and intergranular fractures. These findings demonstrate that Al2O3 whisker reinforcement significantly improves the mechanical performance of 3Y-TZP ceramics, while microwave sintering enhances densification, shortens processing time, and refines microstructure, offering an effective strategy for optimizing zirconia-based composites. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Densification

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Electrochemical anodic oxidation assisted fabrication of memristors

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International Journal of Extreme Manufacturing 2024年第3期6卷 250-272页

作者： Shuai-Bin Hua Tian Jin Xin Guo School of Materials Science and Engineering State Key Laboratory of Material Processing and Die&Mould TechnologyHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China

Owing to the advantages of simple structure,low power consumption and high-density integration,memristors or memristive devices are attracting increasing attention in the fields such as next generation non-volatile memories,neuromorphic computation and data ***,the deposition of memristive films often requires expensive equipment,strict vacuum conditions,high energy consumption,and extended processing *** contrast,electrochemical anodizing can produce metal oxide films quickly(e.g.10 s) under ambient *** means of the anodizing technique,oxide films,oxide nanotubes,nanowires and nanodots can be fabricated to prepare *** film thickness,nanostructures,defect concentrations,etc,can be varied to regulate device performances by adjusting oxidation parameters such as voltage,current and *** memristors fabricated by the anodic oxidation technique can achieve high device consistency,low variation,and ultrahigh yield *** article provides a comprehensive review of the research progress in the field of anodic oxidation assisted fabrication of ***,the principle of anodic oxidation is introduced;then,different types of memristors produced by anodic oxidation and their applications are presented;finally,features and challenges of anodic oxidation for memristor production are elaborated.

关键词： anodic oxidation anodized aluminium oxide memristor resistive switching electrical properties

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Additive manufacturing of bionic interfaces:From conceptual understanding to renewable energy applications

Advanced Bionics

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Advanced Bionics 2025年第1期1卷 57-82页

作者： Xuliang Chen Annan Chen Lei Zhang Hanyang Yu Zhengyi Mao Yuhan Chen Jialun Gu Chunze Yan Jian Lu City University of Hong Kong Matter Science Research Institute(Futian) ShenzhenChina Department of Mechanical Engineering City University of Hong KongHong KongChina State Key Laboratory of Materials Processing and Die&Mould Technology Huazhong University of Science and TechnologyWuhanChina City University of Hong Kong Shenzhen Research Institute Greater Bay Joint DivisionShenyang National Laboratory for Materials ScienceShenzhenChina Hong Kong Branch of National Precious Metals Material Engineering Research Center City University of Hong KongHong KongChina Guangdong-Hong Kong Joint Laboratory of Modern Surface Engineering Technology City University of Hong KongHong KongChina

Bionic interfaces exhibit multiscale features with various functions that reduce energy consumption and produce renewable resources to support life,triggering them an emerging area of technological revolution in many *** improve the design and fabrication flexibility,additive manufacturing(AM)technology has been attempted to achieve multiscale structures and reconstruct biological functions at *** AM of bionic interfaces has led to substantial advancements in renewable energy applications in recent years,but some challenges remain to be *** review first presents a basic understanding of bionic mechanisms and typical manufacturing techniques especially ***,it emphasizes the latest progress of the bionic interfaces and AM on various renewable energy applications,such as those for wetting-controlled surfaces,energy harvesting,water treatment,batteries,and ***,it discusses some challenges and provides insights on how bionic interfaces and AM provide innovative solutions for next-generation renewable energy applications.

关键词： Additive manufacturing Bionic Interface Renewable energy

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