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Development and wear performance of ceramic TiC reinforced Ni-based solid lubrication composite coatings by laser cladding

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Ceramics International 2025年

作者： Chu-Yi Zhang Zan-Song Li Xiu-Bo Liu Xiao-Ming Xie Xin-Gong Li Hai-Bin Zhou Yuan Meng Dong-Sheng Wang Fang Xie State Key Laboratory of Utilization of Woody Oil Resource Central South University of Forestry and Technology Changsha 410004 China Hunan Province Key Laboratory of Materials Surface/Interface Science & Technology Central South University of Forestry & Technology Changsha 410004 China College of Mechanical Engineering Tongling University No. 1335 Cuihu 4th Road Tongling Anhui Province 244000 China Henan Province Engineering Research Center of Additive Manufacturing Aeronautical Materials Nanyang Institute of Technology Nanyang 473004 China

To extend the service life of TC4 in wide temperature ranges and high-wear environments, laser cladding was employed to deposit Ni60A-20 wt.%TiC - x Cu (x=5, 10, 15 wt.%) self-lubricating coatings on surface of TC4 substrate. The microhardness, COF, and wear rate of coatings were tested at RT/600°C, respectively. Characterization techniques such as SEM, EDS, XRD, and XPS were used to deeply analyze phase composition and microstructure, aiming to explore the principles behind the enhancement of the coating's microhardness and tribological properties, and to delve into the wear mechanisms at both RT and 600°C. The research results indicate that microhardness of Ni60A-20wt.%TiC/ x Cu coatings is 1.73 to 2.00 times higher than substrate. Primarily attributed to solid solution strengthening effect of Cu and supporting role of in-situ formed TiC-Cr x C y hard phase network. Grain refinement strengthening effect of Cu and TiC also contributes to the improvement of microhardness. In terms of tribological properties, wear rate of coatings is reduced by 2-3 orders of magnitude compared to TC4, highlighting their high engineering application value. Notably, the TC15 coating exhibits t exhibits the lowest COF and wear rate at 600°C, which are 0.122 and 2.17×10 -5 mm 3 /(N·m) respectively, a reduction of 73.7% and 98.9% compared to substrate. This is mainly because, at 600°C, Cu and its oxides can compensate for the cracks generated by wear, enhance the toughness of the coating, and prevent its brittle spalling. Furthermore, the presence of abundant oxides on the surface forms a tribo-film, which can adsorb wear debris and reduce abrasive wear. The primary wear mechanisms of TC15 coating are oxidative and mild abrasive wear.

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Synergistic enhancement of thermoelectric properties in carbon nanotube networks via biomass lignin

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Journal of colloid and interface science 2025年 698卷 138057页

作者： Hui Li Han Zhang Jianhao Zhu Ningjiang Hu Feipeng Du Siqi Liu Fuat Erden Ming Yang Pengcheng Li Chaobin He Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials State Key Laboratory of Green and Efficient Development of Phosphorus Resources School of Materials Science and Engineering Wuhan Institute of Technology Wuhan 430205 China. Department of Materials Science & Engineering National University of Singapore 9 Engineering Drive 1 117574 Singapore Institute of Materials Research and Engineering A*STAR (Agency for Science Technology and Research) 117602 Singapore. Department of Aeronautical Engineering Sivas University of Science and Technology 58000 Sivas Turkey. Hubei Integrative Technology and Innovation Center for Advanced Fiberous Materials 430299 China. Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy Materials State Key Laboratory of Green and Efficient Development of Phosphorus Resources School of Materials Science and Engineering Wuhan Institute of Technology Wuhan 430205 China. Electronic address: pengchengli2013@***. Institute of Materials Research and Engineering A*STAR (Agency for Science Technology and Research) 117602 Singapore. Electronic address: msehc@nus.edu.sg.

Despite interconnected uniform carbon nanotubes (CNTs) networks can lead to ultrahigh electrical conductivity, the concomitant relatively low Seebeck coefficient results in an inferior thermoelectric (TE) power factor due to the typical trade-off relationship between electrical conductivity and Seebeck coefficient. Herein, we present a facile approach to enhance the TE performance of CNT composites by embedding lignin into highly conductive CNT network via a dip-coating approach. The energy filtering effect at the CNTs/lignin interfaces enables a significant improvement in the Seebeck coefficient. Concurrently, the preservation of the CNTs conductive network structure ensures continuous pathways for carrier transport, thereby maintaining a moderate magnitude of electrical conductivity despite the incorporation of insulating lignin. Through systematic optimization of lignin concentration and soaking duration, a maximum power factor of 550.5 μW m K is achieved for the CNTs/lignin composite prepared with a 2 mg mL lignin solution for 5 min, superior to that of most reported CNTs based composite films. Considering the remarkable TE performance, a TE device comprising 5 pairs of CNTs/lignin films and Ni wires is fabricated to deliver a high output power of 220 nW at ΔT of 30 K. Moreover, the device exhibited remarkable temperature-sensing capabilities and stable voltage response, highlighting its potential application as a wearable power source and temperature sensor. This work not only provides a feasible strategy for synergistically enhancing the TE properties of CNT composites using biomass lignin, but also paves the way for the utilization of biomass lignin for wearable electronics.

关键词： Biomass lignin Carbon nanotubes Conductive network Thermoelectric

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Towards Ultra-Stable Wide-Temperature Zinc-Ion Batteries by Using Ion-Sieving Organic Framework Membrane

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Angewandte Chemie 2025年

作者： Dr. Jie Xu Yuting Yang Qingyu Dai Zhangyu Zheng Dr. Yongjie Cao Dr. Yuwen Cheng Bo Peng Prof. Lianbo Ma Prof. Yonggang Wang School of Materials Science and Engineering Key Laboratory of Efficient Conversion and Solid-state Storage of Hydrogen & Electricity of Anhui Province Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education Anhui University of Technology Ma'anshan 243002 China. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University Shanghai 200433 China

Aqueous zinc-ion batteries (AZIBs) offer notable advantages in safety and cost-efficiency, but Zn dendrite growth and unstable interfacial reactions hinder their commercial viability. A crucial factor in addressing these challenges lies in optimizing the separator to regulate ion transport and stabilize electrode interfaces. Herein, we propose a covalent organic framework (COF)-based separator with quasi-single-ion conduction, specifically a Zn 2+ -substituted sulfonate COF (COF-Zn) membrane, designed to tackle these issues. Featuring a high Zn transference number (0.87) and a thin 25 μm profile, the COF-Zn separator allows for reduced electrolyte usage (20 μL mg −1 ) while effectively minimizing cathode dissolution. Its quasi-single-ion conductivity and electronegative properties improve Zn anode's stability by lowering water activity. This separator enables ultra-stable AZIBs, as demonstrated in various full cells including Zn//4,5,9,10-pyrenetetrone (PTO), Zn//I 2 and Zn//V 2 O 5 . Remarkably, the Zn//PTO cell achieves an energy density of 260 Wh kg −1 , 100 % capacity retention under reduced electrolyte conditions, and stable all-weather cycling from −40 to +100 °C with a customized electrolyte.

关键词： Aqueous zinc-ion batteries Single-ion conduction Electrolyte optimization Wide-temperature adaptability

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Layered Foam/Film Polymer Nanocomposites with Highly E cient EMI Shielding Properties and Ultralow Reflection

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Nano-Micro Letters 2022年第1期14卷 313-330页

作者： Li Ma Mahdi Hamidinejad Biao Zhao Caiyun Liang Chul B.Park Department of Mechanical and Industrial Engineering University of Toronto5 King's College Road Institute for Manufacturing Department of EngineeringUniversity of Cambridge Laboratory of Advanced Materials Department of Materials ScienceCollaborative Innovation Center of Chemistry for Energy MaterialsFudan University Henan Key Laboratory of Aeronautical Materials and Application Technology School of Material Science and EngineeringZhengzhou University of Aeronautics CAS Key Laboratory of High-Performance Synthetic Rubber and Its Composite Materials Changchun Institute of Applied ChemistryChinese Academy of Sciences

Lightweight, high-e ciency and low reflection electromagnetic interference（EMI） shielding polymer composites are greatly desired for addressing the challenge of ever-increasing electromagnetic pollution. Lightweight layered foam/film PVDF nanocomposites with e cient EMI shielding e ectiveness and ultralow reflection power were fabricated by physical foaming. The unique layered foam/film structure was composed of PVDF/Si Cnw/MXene（Ti3C2Tx） composite foam as absorption layer and highly conductive PVDF/MWCNT/Gn Ps composite film as a reflection layer. The foam layer with numerous heterogeneous interfaces developed between the Si C nanowires（Si Cnw） and 2 D MXene nanosheets imparted superior EM wave attenuation capability. Furthermore, the microcellular structure e ectively tuned the impedance matching and prolonged the wave propagating path by internal scattering and multiple reflections. Meanwhile, the highly conductive PVDF/MWCNT/Gn Ps composite(～ 220 Sm-1) exhibited superior reflectivity（R） of 0.95. The tailored structure in the layered foam/film PVDF nanocomposite exhibited an EMI SE of 32.6 d B and a low reflection bandwidth of 4 GHz（R < 0.1） over the Kuband（12.4-18.0 GHz） at a thickness of 1.95 mm. A peak SER of 3.1 × 10-4d B was obtained which corresponds to only 0.0022% reflection e ciency. In consequence, this study introduces a feasible approach to develop lightweight, high-e ciency EMI shielding materials with ultralow reflection for emerging applications.

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Multi-Group Polymer Coating on Zn Anode for High Overall Conversion Efficiency Photorechargeable Zinc-Ion Batteries

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Angewandte Chemie 2024年第39期136卷

作者： Ming Chen Xiaojun Guo Xiao Jiang Bita Farhadi Xin Guo Yan Zhu Haoxiang Zhang Shengzhong (Frank) Liu School of Electric Power Civil Engineering and Architecture College of Physics and Electronics Engineering State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi University Taiyuan 030006 China These authors contributed equally Key Laboratory of Photoelectric Conversion and Utilization of Solar Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 P. R. China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal

The solar-driven photorechargeable zinc-ion batteries have emerged as a promising power solution for smart electronic devices and equipment. However, the subpar cyclic stability of the Zn anode remains a significant impediment to their practical application. Herein, poly(diethynylbenzene-1,3,5-triimine-2,4,6-trione) (PDPTT) was designed as a functional polymer coating of Zn. Theoretical calculations demonstrate that the PDPTT coating not only significantly homogenizes the electric field distribution on the Zn surface, but also promotes the ion-accessible surface of Zn. With multiple N and C=O groups exhibiting strong adsorption energies, this polymer coating reduces the nucleation overpotential of Zn, alters the diffusion pathway of Zn 2+ at the anode interface, and decreases the corrosion current and hydrogen evolution current. Leveraging these advantages, Zn-PDPTT//Zn-PDPTT exhibits an exceptionally long cycling time (≥4300 h, 1 mA cm −2 ). Zn-PDPTT//AC zinc-ion hybrid capacitors can withstand 50,000 cycles at 5 A/g. Zn-PDPTT//NVO zinc-ion battery exhibits a faster charge storage rate, higher capacity, and excellent cycling stability. Coupling Zn-PDPTT//NVO with high-performance perovskite solar cells results in a 13.12 % overall conversion efficiency for the photorechargeable zinc-ion battery, showcasing significant value in advancing the efficiency and upgrading conversion of renewable energy utilization.

关键词： photorechargeable zinc-ion batteries perovskite solar cells overall conversion efficiency

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Muon Spin Relaxation Study of Spin Dynamics on a Kitaev honeycomb material H3LiIr2O6

arXiv

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arXiv 2022年

作者： Yang, Yan-Xing Jiang, Cheng-Yu Huang, Liang-Long Zhu, Zi-Hao Chen, Chang-Sheng Wu, Qiong Ding, Zhao-Feng Tan, Cheng Chen, Kai-Wen Biswas, Pabi K. Hillier, Adrian D. Shi, You-Guo Liu, Cai Wang, Le Ye, Fei Mei, Jia-Wei Shu, Lei State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200438 China Department of Physics Southern University of Science and Technology Shenzhen518055 China ISIS Facility STFC Rutherford Appleton Laboratory Chilton Didcot OxfordshireOX110QX United Kingdom Institute of Physics Chinese Academy of Sciences Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100190 China Shenzhen Key Laboratory of Quantum Science and Engineering Shenzhen518055 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China

The vacancy effect in quantum spin liquid (QSL) has been extensively studied. A finite density of random vacancies in the Kitaev model can lead to a pileup of low-energy density of states (DOS), which is generally experimentally determined by a scaling behavior of thermodynamic or magnetization quantities. Here, we report detailed muon spin relaxation (μSR) results of H3LiIr2O6, a Kitaev QSL candidate with vacancies. The absence of magnetic order is confirmed down to 80 mK, and the spin fluctuations are found to be persistent at low temperatures. Intriguingly, the time-field scaling law of longitudinal-field (LF)-μSR polarization is observed down to 0.1 K. This indicates a dynamical scaling, whose critical exponent 0.46 is excellently consistent with the scaling behavior of specific heat and magnetization data. All the observations point to the finite DOS with the form N(E) ~ E−ν , which is expected for the Kitaev QSL in the presence of vacancies. Our μSR study provides a dynamical fingerprint of the power-law low-energy DOS, and introduces a crucial new insight into the vacancy effect in QSL. © 2022, CC BY.

关键词： Spin fluctuations

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Polydentate Ligand Reinforced Chelating to Stabilize Buried Interface toward High-Performance Perovskite Solar Cells

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Angewandte Chemie 2024年第8期136卷

作者： Baibai Liu Qian Zhou Yong Li Yu Chen Dongmei He Danqing Ma Xiao Han Ru Li Ke Yang Yingguo Yang Shirong Lu Xiaodong Ren Zhengfu Zhang Liming Ding Jing Feng Jianhong Yi Jiangzhao Chen Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education) College of Optoelectronic Engineering Chongqing University Chongqing 400044 China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China Chongqing Institute of Green and Intelligent Technology Chinese Academy of Sciences Chongqing 400714 China School of Microelectronics Fudan University Shanghai 200433 China Department of Material Science and Technology Taizhou University Taizhou 318000 China Yunnan Key Laboratory for Micro/Nano Materials & Technology International Joint Research Center for Optoelectronic and Energy Materials School of Materials and Energy Yunnan University Kunming 650091 China Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China Center for Excellence in Nanoscience (CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS) National Center for Nanoscience and Technology Beijing 100190 China

The instability of the buried interface poses a serious challenge for commercializing perovskite photovoltaic technology. Herein, we report a polydentate ligand reinforced chelating strategy to strengthen the stability of buried interface by managing interfacial defects and stress. The bis(2,2,2-trifluoroethyl) (methoxycarbonylmethyl)phosphonate (BTP) is employed to manipulate the buried interface. The C=O, P=O and two −CF 3 functional groups in BTP synergistically passivate the defects from the surface of SnO 2 and the bottom surface of the perovskite layer. Moreover, The BTP modification contributes to mitigated interfacial residual tensile stress, promoted perovskite crystallization, and reduced interfacial energy barrier. The multidentate ligand modulation strategy is appropriate for different perovskite compositions. Due to much reduced nonradiative recombination and heightened interface contact, the device with BTP yields a promising power conversion efficiency (PCE) of 24.63 %, which is one of the highest efficiencies ever reported for devices fabricated in the air environment. The unencapsulated BTP-modified devices degrade to 98.6 % and 84.2 % of their initial PCE values after over 3000 h of aging in the ambient environment and after 1728 h of thermal stress, respectively. This work provides insights into strengthening the stability of the buried interface by engineering multidentate chelating ligand molecules.

关键词： Buried Interface Chelating Perovskite Polydentate Ligand Solar Cells

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A post-treatment to reduce stress concentration sensitivity under intermediate-temperature fatigue in GH4169: High-energy impact composite modification

Transactions of Materials Research

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Transactions of Materials Research 2025年第3期1卷

作者： Guoxin Lu Qiang Wang Bonnie Attard Arif Rochman Guofang Zhang Luqing Cui Zhong Ji Glenn Cassar MOE Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Shandong University Jinan 250061 China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material AECC Beijing Institute of Aeronautical Materials Beijing 100095 China Department of Metallurgy and Materials Engineering University of Malta MSD 2080 Malta Institute of Engineering and Transport The Malta College of Arts Science & Technology PLA 9032 Malta National Key Lab of Aerospace Power System and Plasma Technology Xi’an Jiaotong University Xi’an 710049 China

The study focuses on a novel post-treatment method, high-energy impact composite modification, combining mechanical shot peening and laser shock processing to improve the fatigue performance of the nickel-based superalloy GH4169 at intermediate temperatures. The synergistic interaction between mechanical impact (SP-induced plastic deformation) and laser-induced shock waves enabled a 2.5-fold increase in effective treatment depth (up to 1500 μm) compared to SP alone (400 μm), while achieving a surface hardness of 520 HV and compressive residual stress of −1465 MPa, exceeding single-process results by 4.5% and 54.2%, respectively. The dual-impact approach significantly enhanced surface hardness and compressive residual stress, addressing the high sensitivity to stress concentration. Experimental results demonstrate that HEICM eliminated stress concentration sensitivity at 650 °C, elevating the fatigue limit of notched specimens (Kt = 3) to 638 MPa – equivalent to the fatigue strength of smooth specimens (Kt = 1) in conventional grinding states (636 MPa). This represents a 116% improvement over untreated notched specimens (295 MPa) and surpasses SP-treated counterparts (446 MPa) by 43%, thereby extending the fatigue life of GH4169 alloys in aerospace applications.

关键词： Composite modification Shot peening surface strengthening Superalloy High-cycle fatigue

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Au [email protected] alloy shell nanowires for ethanol oxidation

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Materials Today Physics 2023年 31卷

作者： Qi Xue Zixin Ge Zihan Yuan Jiangtao Huang Bin He Yu Chen Key Laboratory of Macromolecular Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid Chemistry (MOE) Shaanxi Key Laboratory for Advanced Energy Devices School of Materials Science and Engineering Shaanxi Normal University Xi'an 710062 China School of Chemistry and Chemical Engineering Xi'an University of Architecture and Technology Xi'an 710055 China College of New Materials and New Energies Shenzhen Technology University Shenzhen 518118 China

The highly active, selective and stable anode electrocatalysts for the ethanol oxidation reaction (EOR) are extremely desirable for the application of direct ethanol fuel cells (DEFCs). Herein, one-dimensional Au [email protected] 0·20 Rh 0.08 alloy shell nanowires ( [email protected] 0·20 Rh 0.08 CS-NWs) with long aspect ratio and cross-linked network architecture are synthesized. For the EOR, [email protected] 0·20 Rh 0.08 CS-NWs display higher peak current density, better resistance to CO poisoning and more lasting stability compared with [email protected] 0.28 CS-NWs and commercial Pt black electrocatalyst, which can be attributed to the trimetallic synergistic effect between the Au, Pt and Rh atoms. Specifically, the Rh can promote the C–C bonds and adsorb OH ads while Au can change the electronic structure of Pt, endowing Pt with a high anti-poisoning ability to CO ads and promoting the complete oxidation of various C1 intermediate to CO 2 . This work provides an effective strategy for the rational construction of high-performance Pt-based EOR electrocatalysts by optimizing composition, morphology and architecture.

关键词： [email protected] structure Fuel cells Ethanol oxidation reaction Synergic effect Selectivity

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High-Efficiency Perovskite Solar Cells Enabled by Guanylation Reaction for Removing MACl Residual and In-Situ Forming 2D Perovskite

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Angewandte Chemie 2024年第7期137卷

作者： Zhuang Xie Yuwei Duan Minghui Cheng Yong Li Zhike Liu Hongxiang Li Yu Chen Zhigang Zang Shengzhong Liu Qiang Peng College of Materials and Chemistry & Chemical Engineering Chengdu University of Technology Chengdu 610059 P. R. China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China College of Polymer Science and Engineering Sichuan University Chengdu 610065 P. R. China Key Laboratory of Optoelectronic Technology & Systems Ministry of Education Chongqing University Chongqing 400044 P. R. China School of Chemical Engineering and State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 P. R. China

The thermodynamical deprotonation of methylammonium chloride (MACl) has several detrimental influences on the quality of formamidinium (FA + )-based perovskite, which limits both efficiency and stability of inverted perovskite solar cells (IPSCs). Herein, a new additive strategy was developed by introducing methyl carbamimidothioate hydroiodide (MCH) into perovskite precursor, where guanylation reaction occurred between MCH and MACl to form a new intermediate of methyl-substituted guanidine (MSG). MSG could then bond with undercoordinated Pb 2+ to in situ form a two-dimensional (2D) perovskite, which would promote the growth and crystallization of three-dimensional (3D) perovskite with higher crystallinity, lower defect-states density and superior stability. Finally, the MCH-treated IPSC with a small area (0.09 cm 2 ) achieved an impressive power conversation efficiency (PCE) of 26.81 % (certified as 26.02 %), which is one of the highest PCEs reported to date. The large area MCH-treated device (1.00 cm 2 ) also obtained a high PCE of 24.36 %. Moreover, the unencapsulated and MCH-treated device exhibited excellent operational stability, maintaining 91.95 % and 97.06 % of their initial efficiencies after aging in air and a nitrogen-filled atmosphere at 85 °C for 1200 h. The encapsulated MCH-treated devices retained 94.25 % of its initial efficiency after continuously tracking at the maximum power-point for 1200 h in air.

关键词： Inverted perovskite solar cells Guanylation reaction Methylammonium chloride residual Two-dimensional perovskite Growth and crystallization

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