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Unlocking the secrets of Ti / Si co-doped diamond-like carbon films for high-performance lubrication in humid environments

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Diamond and Related Materials 2025年 156卷

作者： Xing, Zhaoyang Wang, Xinfei Wang, Xin Xu, Chunlin Zhang, Bin Key Laboratory of Science and Technology on Wear and Protection of Materials Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou730000 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China Surface Engineering Institution AECC Beijing Institute of Aeronautical Materials Beijing100095 China

In this study, Ti / Si co-doped diamond-like carbon (a-C:Ti:Si) films were successfully deposited on silicon wafers, GCr15, and TC4 substrates using a direct current high-power impulse magnetron sputtering co-deposition technique. The effects of varying DC currents on the microstructure, mechanical properties, and tribological performance of the films were systematically investigated. Results indicate that as the DC current increased, the sp3-C content in the films monotonically rose, leading to significant improvements in hardness, elastic modulus, H/E, and H3/E2 ratios. The films deposited on TC4 substrates exhibited the best overall mechanical properties. Tribological tests revealed that the a-C:Ti:Si films achieved lubrication in a humid environment (50 % relative humidity) through the formation of a highly graphitized transfer film and low-shear wear tracks. The lubrication mechanism involves Si-induced interfacial phase transformation and frictional softening, as well as titanium-catalyzed graphitization of the transfer layer. Additionally, tribochemical reactions generated colloidal Si particles and weak shear-strength SiO₂ layers, further enhancing lubrication. This study provides a novel co-deposition method for DLC films and offers a new lubrication strategy for green chemistry and industrial energy conservation and emission reduction. © 2025 Elsevier B.V.

关键词： Diamond like carbon films

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Few-layer perovskite YMnO3: A first-principles study

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Physical Review B 2024年第10期109卷 104430-104430页

作者： Yaping Meng Fanhao Jia Shaowen Xu Heng Gao Wenbin Ouyang Yongchang Li Yaning Cui Yin Wang Wei Ren Institute for Quantum Science and Technology International Centre of Quantum and Molecular Structures Physics Department Shanghai University Shanghai 200444 China Department of Physics College of Science Hangzhou Dianzi University Hangzhou 310018 People's Republic of China School of Physics and Optoelectronic Engineering Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou 310024 China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials (Anhui University of Technology) Ministry of Education Maanshan 243002 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China

The successful preparation of freestanding oxide perovskites down to the few-layer limit inspires the development of two-dimensional multifunctional materials exhibiting both ferroelectric and ferromagnetic properties. In this study, we performed a comprehensive first-principles investigation on the few-layer perovskite YMnO3. Our findings reveal that its monolayer is an antiferromagnetic semiconductor, while other few layers are ferromagnetic half metals. All of them have an in-plane polarization with moderate energy barrier, although the “polarization” of metallic few layers may be not switchable. The distortion modes of few-layer YMnO3 are different from its orthorhombic bulk counterpart which is paraelectric. The symmetry mode analysis reveals that the monolayer YMnO3 displays proper ferroelectric behavior. We have investigated the polarization and magnetism of few-layer polar oxide perovskites and found that they strongly depend on the number of layers. These results will contribute to our current understanding of the properties of few-layer polar oxide perovskites.

关键词： Density of states Electrical properties Electronic structure Ferroelectricity Magnetism

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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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A new catalyst for urea oxidation: NiCo2S4 nanowires modified 3D carbon sponge

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Journal of Energy Chemistry 2020年第11期29卷 195-205页

作者： Biaopeng Li Congying Song Jianjun Rong Jing Zhao Hong-En Wang Ping Yang Ke Ye Kui Cheng Kai Zhu Jun Yan Dianxue Cao Guiling Wang Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001HeilongjiangChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina

Urea oxidation is a significant reaction for utilizing urea-rich wastewater or human urine as sustainable power sources which can ease the water eutrophication while generate electricity. A direct urea-hydrogen peroxide fuel cell is a new kind of fuel cell employing urea as fuel and hydrogen peroxide as oxidant which possesses a larger cell voltage. Herein, this work tries to promote the kinetics process of urea oxidation by preparing low-cost and high-efficient NiCo2S4 nanowires modified carbon sponge electrode. The carbon sponge used in this work with a similar three-dimensional multi-channel structure to Ni foam, is prepared by carbonizing recycled polyurethane sponge which is also a process of recycling waste. The performance of the prepared catalyst in an alkaline solution is investigated in a three-electrode *** the introduction of Co element to the catalyst, a reduced initial urea oxidation potential and a high performance are obtained. Furthermore, a direct urea-hydrogen peroxide fuel cell is assembled using the NiCo2S4 nanowires modified carbon sponge anode. Results indicate that the prepared catalyst provides a chance to solve the current problems that hinder the development of urea electrooxidation(high initial urea oxidation potential, low performance, and high electrode costs).

关键词： Carbon sponge Direct urea fuel cell Electrocatalyst NiCo2S4 nanowires Urea oxidation

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High-brightness acousto-optic Q-switched 532 nm laser coupled with 200 μm fiber

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Optik 2025年 320卷

作者： Hu, Jiapeng Liu, Hongcai Li, Dong Xia, Nanhui Zhu, Yun Zhang, Tianyu Liu, Xuesheng Yan, Anru Liu, Youqiang Wang, Zhiyong College of Physics and Optoelectronic Engineering Beijing University of Technology Beijing100124 China AVIC Beijing Aeronautical Manufacturing Technology Research Institute Beijing100024 China Key Laboratory of Trans-Scale Laser Manufacturing Technology Beijing University of Technology Ministry of Education Beijing100124 China Institute of Advanced Technology on Semiconductor Optics & Electronics Institute of Laser Engineering Beijing University of Technology Beijing100124 China

We have developed a diode side pumped intracavity frequency switched Nd:YAG laser with fiber coupled output, which has the characteristics of high power, high beam quality and high brightness, and has a unique application in the field of laser processing. In order to solve the influence of thermal effect of Nd:YAG crystal on optical resonator, the thermal focal length was measured and a stable cavity structure was designed. When the repetition rate was 10 kHz, the maximum output power of the 532 nm laser was 96 W, and the pulse width was 55.8 ns. The beam quality was measured as Mx2= 5.98 in the horizontal direction and My2= 8.14 in the vertical direction, corresponding to the brightness of 6.97×108 W·cm−2·Sr. The maximum fiber coupling output power was 94 W, with a fiber core of 200 μm and a fiber coupling efficiency of 98 %. As far as we know, the fiber–solid-state acousto-optic Q-switched 532 nm laser obtains the highest brightness. © 2024 The Authors

关键词： Luminance

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Application of single-cell Raman-deuterium isotope probing to reveal the resistance of marine ammonia-oxidizing archaea SCM1 against common antibiotics

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Chemosphere 2024年 362卷 142500页

作者： Kong, Lingchao Wang, Yi Cui, Dongyu He, Wei Zhang, Chuanlun Zheng, Chunmiao State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control Southern University of Science and Technology Guangdong Shenzhen518055 China Shenzhen Key Laboratory of Marine Archaea Geo-Omics Department of Ocean Science and Engineering Southern University of Science and Technology Shenzhen518055 China Eastern Institute for Advanced Study Eastern Institute of Technology Ningbo315200 China

Antimicrobial resistance (AMR) in oceans poses a significant threat to human health through the seafood supply chain. Ammonia-oxidizing archaea (AOA) are important marine microorganisms and play a key role in the biogeochemical nitrogen cycle around the world. However, the AMR of marine AOA to aquicultural antibiotics is poorly explored. Here, Raman-deuterium isotope probing (Raman-DIP), a single-cell tool, was developed to reveal the AMR of a typical marine species of AOA, Nitrosopumilus maritimus (designated SCM1), against six antibiotics, including erythromycin, tetracycline, novobiocin, neomycin, bacitracin, and vancomycin. The D2O concentration (30% v/v) and culture period (9 days) were optimized for the precise detection of metabolic activity in SCM1 cells through Raman-DIP. The relative metabolic activity of SCM1 upon exposure to antibiotics was semi-quantitatively calculated based on single-cell Raman spectra. SCM1 exhibited high resistance to erythromycin, tetracycline, novobiocin, neomycin, and vancomycin, with minimum inhibitory concentration (MIC) values between 100 and 400 mg/L, while SCM1 is very sensitive to bacitracin (MIC: 0.8 mg/L). Notably, SCM1 cells were completely inactive under the metabolic activity minimum inhibitory concentration conditions (MA-MIC: 1.6–800 mg/L) for the six antibiotics. Further genomic analysis revealed the antibiotic resistance genes (ARGs) of SCM1, including 14 types categorized into 33 subtypes. This work increases our knowledge of the AMR of marine AOA by linking the resistant phenome to the genome, contributing to the risk assessment of AMR in the underexplored ocean environment. As antibiotic resistance in marine microorganisms is significantly affected by the concentration of antibiotics in coastal environments, we encourage more studies concentrating on both the phenotypic and genotypic antibiotic resistance of marine archaea. This may facilitate a comprehensive evaluation of the capacity of marine microorganisms t

关键词： Antibiotics

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Construction of immobilized films photocatalysts with CdS clusters decorated by metal Cd and BiOCl for photocatalytic degradation of tetracycline antibiotics

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Chinese Chemical Letters 2022年第8期33卷 3705-3708页

作者： Jiajia Li Ziwei Zhao Zhuoning Li Huijuan Yang Shijun Yue Yuping Tang Qizhao Wang Key Laboratory of Shaanxi Administration of Traditional Chinese Medicine for TCM Compatibility and State Key Laboratory of Research&Development of Characteristic Qin Medicine Resources(Cultivation)and Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Researchand Shaanxi Collaborative Innovation Center of Chinese Medicinal Resources IndustrializationShaanxi University of Chinese MedicineXianyang 712046China School of Water and Environment Chang'an UniversityXi'an 710064China College of Chemistry and Chemical Engineering Northwest Normal UniversityLanzhou 730070China Institute of Advanced Electrochemical Energy School of Materials Science and Engineering Xi'an University of Technologyand Shaanxi International Joint Research Centre of Surface Technology for Energy Storage MaterialsXi'an 710048China

A kind of CdS/Cd-BiOCl immobilized films photocatalyst was *** optical and physicochemical properties of the CdS/Cd-BiOCl photocatalysts were analysed,and the detailed characterization revealed CdS/Cd-BiOCl films photocatalyst with good charge carrier separation *** reusabilities and photocatalytic properties of the samples were *** 15%Cd S/Cd-Bi OCl photocatalyst exhibited superior performance in photocatalytic degradation of tetracycline(TC)and favorable stability under visible light *** for the photodegradation rate of TC,15%CdS/Cd-BiOCl exhibited an excellent photodegradation activity,which is 4.06 and 9.53 times higher than that of Cd S/Cd and Bi OCl,*** results showed that dominant active species are·O_(2)^(-)and·OH radicals during *** charge transfer in Z-scheme CdS/Cd-BiOCl films photocatalyst could synchronously generate conduct band(CB)electrons in BiOCl and valence band(VB)holes in CdS,and metal Cd served as electron *** work can be a reference for the design of film photocatalysts and new insight for photodegradating towards contaminants.

关键词： CdS/Cd-BiOCl immobilized films photocatalyst Photodegradation mechanism Environmental remediation Charge separation Tetracycline

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Coupling of Fe-Nx Sites and Fe Nanoparticles on Nitrogen-Doped Porous Carbon for Boosting Oxygen Electroreduction in Zn-Air Batteries

SSRN

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SSRN 2024年

作者： Zha, Sujuan Wang, Dan Li, Xiaosong Wang, Jibiao Chu, Yuan Mitsuzaki, Naotoshi Chen, Zhidong Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis and Green Manufacturing Collaborative Innovation Center School of Petrochemical Engineering Changzhou University Jiangsu Changzhou213164 China School of Materials Science and Engineering Jiangsu Key Laboratory of Materials Surface Science and Technology Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Changzhou University Jiangsu Changzhou213164 China Changzhou University China

Fe and nitrogen co-doped carbon (Fe-N-C) catalysts have emerged as attractive materials to substitute Pt-based catalysts for the oxygen reduction reaction (ORR) in Zn-air batteries (ZABs). However, the Fe-N-C catalysts with monotypic active component usually endow suboptimal catalytic performance and stability under both acid and alkaline medium. Herein, a nano ZnO template and two-step pyrolysis co-assisted strategy is proposed to achieve the coupling of Fe-Nx sites and metallic Fe nanoparticles in hierarchically porous N-doped carbon for ORR. The nano ZnO template contributes to the formation of meso/macropores structure, while the secondary pyrolysis is beneficial to the creation of more micropores. Besides the advanced hierarchical porosity, the combination of dispersed Fe-Nx sites and dominated metallic Fe nanoparticles is also conducive to boost ORR activity in both acid and alkaline solution. Impressively, the prepared Fe@FeHPNC-P2 electrocatalyst exhibits an excellent half-wave potentials (E1/2) of 0.88 V and 0.79 V in alkaline and acidic electrolyte, respectively. Meanwhile, the assembled liquid Zn-air battery using Fe@FeHPNC-P2 delivers a peak power density of 149.3 mW cm-2 and a maximum energy density of 957.1 Wh kgZn-1 along with long-term stability for 1000 cycles. © 2024, The Authors. All rights reserved.

关键词： II-VI semiconductors

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Effect of Heat and Cryogenic Treatments on the Microstructure and Properties of Yf3 Modified Niti-Si Laser Cladding Coatings

SSRN

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SSRN 2022年

作者： Su, Wennan Zhang, Chi Cui, Xiufang Jin, Guo Liu, Changhao Liu, Erbao Li, Jian Zhao, Haonan Cao, Boyu Tian, Haoliang Institute of Surface/Interface Science and Technology Key Laboratory of Superlight Material and Surface Technology Ministry of Education College of Material Science and Chemical Engineering Harbin Engineering University Harbin150001 China Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material Beijing Beijing Institute of Aeronautical Materials Beijing100095 China

YF 3 modification NiTi-Si coatings were prepared on Ti6Al4V substrate by laser cladding. On this foundation, heat and cryogenic treatments were conducted respectively to explore the effect of after-treatment procedures. The consequence of post-treatment methods on the phase constituent, microstructure, mechanical property, and phase transition characteristics of post-treatment coatings was studied. The phase constituent of the three coatings is roughly the same, composed of NiTi and NiTi 2 . Simultaneously, eutectic structures were found in three coatings, which also proved that the post-treatment would not affect the appearance of the eutectic structure. The results show that heat treatment led to the coarsening of the grain size of the NiTi phase, and the composition of Si element in the NiTi 2 phase increased. On the contrary, the cryogenic treatment led to the refinement of grains and eutectic structure in the coatings. In addition, due to the rapid cooling rate provided by cryogenic treatment, the spinodal decomposition of the Si element occurred in the NiTi 2 phase, which was confirmed by TEM and EDS. The microhardness of the three coatings is as follows: cryogenic treatment>original coatings>heat treatment. The cryogenic treatment coating has the highest microhardness due to grain refinement and spinodal decomposition. Furthermore, the post-treatments also affected the phase transformation characteristics of the coatings. © 2022, The Authors. All rights reserved.

关键词： Coatings

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Necking and Softening Affected by Grain Shape and Grain Boundary Sliding in Selective Laser Melted Β-Ti Alloy

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SSRN 2024年

作者： Xie, Qingge Feng, Kaihang Chu, Qingkun Yan, Xingchen Liu, Min Yu, Donghai Yin, Shuo Wang, Yandong Collaborative Innovation Center of Steel Technology University of Science and Technology Beijing Beijing100083 China National Engineering Laboratory for Modern Materials Surface Engineering Technology The Key Lab of Guangdong for Modern Surface Engineering Technology Institute of New Materials Guangdong Academy of Sciences Guangzhou510651 China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing100083 China Trinity College Dublin The University of Dublin Department of Mechanical Manufacturing and Biomedical Engineering Parsons Building Dublin 2 Ireland Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology Beijing Beijing100083 China

No strain hardening of the Ti-12Mo-6Zr-2Fe alloy has been ascribed to a dynamic recovery effect. However, in our recent tests, grain boundary sliding (GBS) induced softening and cracks occurrence at grain boundaries (GBs) were identified for tensile deformation in the same alloy prepared by selective laser melting (SLM). Obviously twisted morphologies of melt pool due to sliding along GBs or sub-GBs provide evidences of GBS. Samples with columnar grains aligned // loading direction (LD) featured faster softening and failure than those with columnar grains ⊥ LD. In the deformation microstructure, there was more significant GBS in the former than in the latter. Typically, columnar grains // LD featured the following: (1) the lattice rotation axis of grain fragments is mainly // or ⊥ or at ~45° to LD. (2) The smashed grains separated by nodule-like deformation bands often featured a bamboo-like structure, which is expected to promote failure. (3) Both Rachinger sliding and Lifshitz sliding were identified. (4) Deformation grains occasionally featured a circle-like orientation distribution in the {101} pole figure with various lattice rotation axes, and it is intensified by necking. Also, the occurrence of fracture edge at ~45° to LD correlates to the grain-shape effect on necking. The present paper not only provides microscopic insights on GBS for samples with large grain size, which is normally suspected not to favor GBS, but also explores the columnar grain shape effect on damage anisotropy. Both contribute to a fundamentally understanding on the damage anisotropy of the SLM processed β-Ti alloy. © 2024, The Authors. All rights reserved.

关键词： Strain hardening

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