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Microstructure evolution of 7050 aluminum forgings during surface cumulative plastic deformation

Transactions of Nonferrous Metals Society of China 2025年第1期35卷 45-59页

作者： Jian-liang HU Ze-xiong ZHANG Cheng XING Xiu-jiang WU Shi-quan HUANG Hong BO Key Laboratory of Advanced Forging&Stamping Technology and Science Ministry of EducationYanshan UniversityQinhuangdao 066004China State Key Laboratory of Precision Manufacturing for Extreme Service Performance Central South UniversityChangsha 410083China College of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China Hebei Engineering Technology Research Center of Metal Precision Plastic Processing Yanshan UniversityQinhuangdao 066004China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

To elucidate the mechanisms of regulating the microstructure uniformity in 7050 aluminum forgings through surface cumulative plastic deformation(SCPD),the microstructure under different solution treatments was investigated using metallographic observation(OM),electron backscatter diffraction(EBSD),transmission electron microscopy(TEM),and X-ray diffraction(XRD).The findings demonstrate that the most uniform microstructure in the forgings is achieved with a solution treatment at 470℃for 30 *** SCPD process generates a significant number of needle-shaped precipitates,resulting in a higher dislocation density and stored *** treatments alleviate the pinning effect of second-phase particles and facilitate static recrystallization(SRX)in forgings,leading to a reduction in grain ***,mechanical testing results demonstrate 7%−13%increase in tensile strength and more uniform elongation of the forgings in different directions.

关键词： microstructure homogeneity surface cumulative plastic deformation(SCPD) static recrystallization(SRX) dislocation density

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The mesomorphic and luminescent behaviour of diphenyl- and dipyridine-based thiophene/benzothiadiazole liquid crystals with methoxy and octyloxy chains

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Journal of Molecular Structure 2025年 1343卷

作者： Hu, Guang Qian, Wei Zhang, Baolong Shi, Zhihui Wang, Yu Cai, Peng Lu, Huanjun Min, Dandan Zhang, Kailong National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province Faculty of Chemical Engineering Huaiyin Institute of Technology Huaian223003 China Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and Technology Suzhou University of Science and Technology Suzhou215009 China

A series of diphenyl- and dipyridine-based thiophene and benzothiadiazole liquid crystals bearing methoxy or octyloxy chains were synthesised to comparatively study their mesomorphic behaviour and luminescence. The effects of molecular structures on mesogenic types, phase transition temperatures and luminescence were systematically studied by varying the aromatic cores (pyridine, thiophene, benzothiadiazole, and benzene) and alkoxy chain length (methoxy and octyloxy). Results indicate that pyridine rings significantly influence the formation of liquid crystalline phases and phase transition temperatures. Furthermore, the fluorescence emission of diphenyl- and dipyridine-based benzothiadiazole derivatives was measured in both solid and solution states to evaluate the impact of aromatic core substitution and alkyl chain length. Distinct emission colours were observed between solid and solution states, which were attributed to differences in molecular packing, electronic effects, and environmental interactions arising from the incorporation of pyridine cores. © 2025 Elsevier B.V.

关键词： Chain length

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Chiral crystallization manipulated by orbital angular momentum of light

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Optica 2023年第3期10卷 332-338页

作者： Toyoda, Kohei Su, Hao-Tse Miyamoto, Katsuhiko Sugiyama, Teruki Omatsu, Takashige Graduate School of Engineering Chiba University 1-33 Yayoi-cho Inage-ku Chiba263-8522 Japan Molecular Chirality Research Center Chiba University 1-33 Yayoi-cho Inage-ku Chiba263-8522 Japan Department of Applied Chemistry Center for Emergent Functional Matter Science National Yang Ming Chiao Tung University 1001 University Road Hsinchu300093 Taiwan Division of Materials Science Nara Institute of Science and Technology 8916-5 Takayama Ikoma Nara630-0192 Japan

We present what we believe to be the demonstration of optical vortex trapping and chiral crystallization of sodium chlorate (NaClO3). In this work, the chirality of NaClO3 crystals is selectively controlled by altering the helicity (helical direction of the wavefront) of an irradiating optical vortex laser beam. A high crystal enantiomeric excess of 57% is achieved. These results demonstrate that the orbital angular momentum of an irradiating optical vortex laser beam twists the crystal during its polymorphic transition from a metastable achiral crystal to a stable chiral crystal. This work will offer fundamental insights into the dynamics and mechanism of enantioselective control in chiral crystallization and the origin of homochirality. © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Sodium compounds

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Boosting the performance of LiNi_(0.90)Co_(0.06)Mn_(0.04)O_(2) electrode by uniform Li_(3)PO_(4) coating via atomic layer deposition

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Chinese Chemical Letters 2024年第5期35卷 499-503页

作者： Mingjiao Lu Zhixing Wang Gui Luo Huajun Guo Xinhai Li Guochun Yan Qihou Li Xianglin Li Ding Wang Jiexi Wang School of Metallurgy and Environment Central South UniversityChangsha 410083China BASF ShanShan Battery Materials Co. Ltd.Changsha 410006China Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Nonferrous Value-Added Metallurgy Central South UniversityChangsha 410083China School of Physics and Chemistry Hunan First Normal UniversityChangsha 410205China National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming 650093China

Ultra-high nickel material is considered to be a promising cathode ***,with the increase of nickel content,the interfacial side reactions between the cathode and electrolyte become increasingly ***,an atomically controllable ionic conductor Li_(3)PO_(4)(LPO)coating is deposited on the LiNi_(0.90)Co_(0.06)Mn_(0.04)O_(2)(NCM9064)based electrode by the atomic layer deposition *** results shows that the LPO coating is uniformly and densely covered on the surface of secondary particles of NCM9064,helping to prevent the direct contact between the electrolyte and cathode during the chargingdischarging *** addition,the coating layer is electrochemically *** a result,the interfacial side reactions during the long cycle are effectively suppressed,and the solid electrolyte interphase layer at the interface is *** electrode with 20 layers of LPO deposition(ALD-LPO-20)exhibits an excellent capacity retention of 81%after 200 cycles in 2.8-4.3 V at 25℃,which is 18%higher than the unmodified material(ALD-LPO-0).Besides,the moderate LPO coating improves the rate capability and high temperature cycling performance of *** study provides a method for the modification of ultra-high nickel cathode materials and corresponding electrodes.

关键词： Ultra-high nickel material LiNi_(0.90)Co_(0.06)Mn_(0.04)O_(2) Atomic layer deposition Li_(3)PO_(4) Ionic conductor

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Co-production of hydrochar and bioactive compounds from Ulva lactuca via a hydrothermal process

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Carbon Resources Conversion 2024年第1期7卷 1-9页

作者： Edy Hartulistiyoso Obie Farobie Latifa A Anis Novi Syaftika Asep Bayu Apip Amrullah Navid R.Moheimani Surachai Karnjanakom Yukihiko Matsumura Department of Mechanical and Biosystem Engineering IPB UniversityBogorWest Java 16002Indonesia Surfactant and Bioenergy Research Center(SBRC) IPB UniversityBogorWest Java 16144Indonesia Research Centre for Industrial Process and Manufacturing Technology National Research and Innovation Agency(BRIN)TangerangSelatanIndonesia Research Center for Vaccine and Drugs National Research and Innovation Agency(BRIN)BogorWest Java 16911Indonesia Department of Mechanical Engineering Lambung Mangkurat UniversityBanjarmasinSouth KalimantanIndonesia Algae R&D Centre Harry Butler InstituteMurdoch UniversityMurdochWA 6150Australia Department of Chemistry Rangsit UniversityPathumthani 12000Thailand Graduate School of Advanced Science and Engineering Hiroshima University1-4-1 KagamiyamaHigashi-Hiroshima 739-8527Japan

This study investigates the simultaneous production of hydrochar and bioactive compounds from Ulva lactuca via a hydrothermal *** experiment was carried out using a batch reaction vessel at different reaction temperatures of 180-220◦C and various holding times of 30-90 *** expected,both temperature and time vigorously influenced hydrochar and bioactive compound *** maximum hydrochar yield was at 32.4 wt%.The higher heating value(HHV)of hydrochar was observed in the range of 17.68-21.07 MJ kg^(-1),near the energy content of low-rank *** hydrochars exhibited contact angles higher than 90°(i.e.,94-108°)for a longer time,confirming their hydrophobic *** scanning electron microscope analysis(SEM)showed that the hydrothermal process enables cracks in the spherical shape of raw *** into small and porous *** producing hydrochar,the hydrothermal process of *** also gives promising antioxidants and phenolics as bioactive *** highest total phenolic content and antioxidant activity could be achieved in hydrolysate at 200℃and 30 min with the value of 1.20±0.12 mg/g and 71.6±1.3%,respectively.

关键词： Algae Bioactive compound Hydrochar Hydrothermal Seaweed

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Diffusion-Free All-Solid-State Batteries Enabled by an Ionic/Electronic Dual-Conductive Anode

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Renewables 2024年第3期2卷 194-203页

作者： Yue Ji Zaifa Wang Changtai Zhao Zhiqiang Fang Yue Gong Qihang Jing Yu Xia Tengjiao Luan Yingying Jiang Jianwen Liang Xiaona Li Mengdi Zhao Ximin Zhai Xiaofei Bie Tao Jiang Dongsheng Geng Xueliang Sun School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083 Solid State Batteries Research Center GRINM(Guangdong)Institute for Advanced Materials and TechnologyFoshan 528051 China Automotive Battery Research Institute Co.Ltd. Beijing 100088 China FAW Corporation Limited Changchun 130013 Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Jilin UniversityChangchun 130025 Eastern Institute for Advanced Study Eastern Institute of TechnologyNingbo 315200 School of Chemistry and Materials Science Nanjing University of Information Science&TechnologyNanjing 210044

Silicon(Si)is one of the most promising anodes for enabling all-solid-state batteries(ASSBs)with high energy density and ***,the tremendous volume change and sluggish kinetics result in poor electrochemical ***,we proposed an ionic/electronic dual-conductive material of Li_(x)Si as a diffusion-rapid and all-active anode for *** with pure Si anode,the as-fabricated Li_(x)Si showed dramatic promotions of 35 times electronic and 400 times ionic *** three-dimensional(3D)ionic-electronic transport system of Li_(x)Si enabled rapid kinetics and uniform volume change of electrode materials in the whole electrode,corresponding to a lower volumechange *** a result,the ASSBs with LiCoO_(2)cathode exhibited a reversible discharge capacity of 154.4 mAh g−1,corresponding to an initial Coulombic efficiency of 97.3%.Besides,the batteries delivered a high rate capacity of 99.3 mAh g^(−1)at 2 C and long-term cycle stability of 94.0%after 800 cycles at 1 C,which was much better than the pure Si *** study sheds light on a new understanding of the importance of ionic conductivity for Si-based anode and might help inspire the design of advanced anode materials for ASSBs.

关键词： all-solid-state batteries lithium silicon anodes interface stability ionic-electronic conductors long-term cycling performance

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Green synthesis,characterization,acaricidal,larvacidal,and repellent activities of copper nanoparticles of Astragalus sinicus against Hyalomma anatolicum

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Asian Pacific Journal of Tropical Biomedicine 2023年第6期13卷 250-257页

作者： Hattan S.Gattan Bassam M.Al-Ahmadi Abdullah F.Shater Qais A.H.Majeed Maha S.Alazemi Abdullah D Alanazi Department of Medical Laboratory Sciences Faculty of Applied Medical SciencesKing Abdulaziz UniversityJeddahSaudi Arabia Special Infectious Agents UnitKing Fahad Medical Research CenterJeddahSaudi Arabia Department of Biology Faculty of ScienceTaibah UniversitySaudi Arabia Department of Medical Laboratory Technology Faculty of Applied Medical SciencesUniversity of TabukTabuk 71491Saudi Arabia Department of Science College of Basic EducationPAAETPost code 23167AridiyaKuwait Department of Biological Sciences Faculty of Science and HumanitiesShaqra UniversityP.O.Box 1040Ad-Dawadimi 11911Saudi Arabia

Objective:To green synthesize and characterize copper nanoparticles(Cu NPs)using Astragalus sinicus,as well as evaluate the acaricidal,larvacidal,and repellent activities of Cu NPs against Hyalomma anatolicum(***),one of the most prevalent ticks infesting cattle in Saudi ***:Cu NPs were green synthesized by adding the Astragalus sinicus extract to a copper sulfate *** acaricidal,larvicidal,and repellent activities of Cu NPs against *** were assessed via the adult immersion test,the larval packet test,and the vertical movement behavior of tick larvae,*** effects of Cu NPs on acetylcholinesterase as well as oxidative enzyme activities were ***:The green synthesized Cu NPs displayed a spherical form with a size range of 15-75 *** exposure of adult *** to different concentrations of Cu NPs,the viability rate of adult *** and the mean number,weight,and hatchability of eggs were noticeably reduced,in comparison to the control group(P<0.001).In addition,the viability rate of larvae considerably declined(P<0.001)with the LC_(50)and LC_(90)values of 11.30 and 20.34μg/m L,*** maximum repellent activity of Cu NPs was observed at 50,100,and 200μg/m L with complete repellent activity after 60,120,and 180 min of exposure,*** NPs,mainly at 1/2 LC_(50)and LC_(50)concentrations,markedly suppressed the acetylcholinesterase activity of the larval stage of ***(P<0.001).Moreover,Cu NPs,mainly at LC_(50)dose,significantly elevated malondialdehyde level while declining glutathione-S-transferase level in *** larvae(P<0.001).Conclusions:Cu NPs show potent acaricidal,larvicidal,and repellent activities against adults and larvae of ***,further studies must be performed to clarify the precise mechanisms and the efficacy of Cu NPs in practical use.

关键词： Insecticide Tick Pesticide Astragalus sinicus Nanomedicine Hyalomma anatolicum Acaricidal activity Larvacidal activity

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Multi-photon Fock state generation using a single-pixel ultrafast photon-number-resolving detector

Multi-photon Fock state generation using a single-pixel ultr...

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Quantum 2.0, QUANTUM 2024 in Quantum 2.0 Conference and Exhibition

作者： Sonoyama, Tatsuki Takahashi, Kazuma Nomura, Takefumi Sano, Tomoki China, Fumihiro Yabuno, Masahiro Miki, Shigehito Terai, Hirotaka Takase, Kan Asavanant, Warit Endo, Mamoru Furusawa, Akira Department of Applied Physics School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan Advanced ICT Research Institute National Institute of Information and Communications Technology 588-2 Iwaoka Nishi-ku Hyogo Kobe651-2492 Japan Optical Quantum Computing Research Team RIKEN Center for Quantum Computing 2-1 Hirosawa Saitama Wako351-0198 Japan

Single-pixel superconducting nanostrip photon detectors (SNSPDs) have both low timing jitter of 50 ps and photon-number-resolving capability. We generate multi-photon Fock states with Wigner negativities using SNSPDs,... 详细信息

ISBN: (纸本)9781557525185

关键词： Timing jitter

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Coherent enhancement of a frequency comb modulated by a terahertz laser field in high-order harmonic generation

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Physical Review A 2023年第4期108卷 043101-043101页

作者： Yuan-Yuan Wu Chang-Tong Liang Bao-Guang Zhao Peng-Cheng Li Research Center for Advanced Optics and Photoelectronics Department of Physics College of Science Shantou University Shantou Guangdong 515063 China Key Laboratory of Intelligent Manufacturing Technology of MOE Shantou University Shantou Guangdong 515063 China Institute of Applied Physics and Computational Mathematics Beijing 100088 China

We present the coherent enhancement of the frequency comb via high-order harmonic generation (HHG) in a train of infrared laser pulses combined with terahertz (THz) laser fields. The HHG spectra are obtained by solving the three-dimensional time-dependent Schrödinger equation by means of the time-dependent generalized pseudospectral method. We find that the structure of the frequency comb via HHG becomes much smoother and more regular, and the yield of the comb is increased by nearly two orders of magnitude. By analyzing the phase coherence of HHG spectra, we demonstrate that the THz laser fields are responsible for the optimization of the structure and yield of the frequency comb since the constructive phase coherence of the HHG spectra is modulated by the THz field. The physical origin of the constructive phase coherence is thanks to the uniform ionization efficiency induced by the THz laser field for each laser pulse, which greatly improves the synchronization of the harmonic emission. Our finding provides a promising method for the enhancement of the frequency comb via HHG.

关键词： Atomic & molecular processes in external fields High-order harmonic generation Light-matter interaction Ultrafast phenomena

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利用商用凝胶型离子交换树脂实现超微纳米颗粒的大规模生产与高效水处理

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Engineering 2023年第4期23卷 149-156,M0007页

作者：程思凯钱杰书张孝林鲁振达潘丙才 School of Environment Nanjing UniversityNanjing 210023China School of Environmental and Biological Engineering Nanjing University of Science and TechnologyNanjing 210094China Research Center for Environmental Nanotechnology(ReCENT) Nanjing UniversityNanjing 210023China College of Engineering and Applied Science Nanjing UniversityNanjing 210023China

纳米技术为深度水处理提供了新的机遇。然而,高活性超微(<5 nm)纳米颗粒材料的大规模生产仍存在挑战,且超微材料在实际水处理中也存在操作困难等问题,阻碍了纳米技术在水污染控制领域的推广应用。针对这些问题,我们提出了一种简便的... 详细信息

纳米技术为深度水处理提供了新的机遇。然而,高活性超微(<5 nm)纳米颗粒材料的大规模生产仍存在挑战,且超微材料在实际水处理中也存在操作困难等问题,阻碍了纳米技术在水污染控制领域的推广应用。针对这些问题,我们提出了一种简便的解决方法,即以商用凝胶型离子交换树脂N201为载体合成超微纳米颗粒。N201是一种季铵化的毫米级聚(苯乙烯二乙烯基苯共聚)小球。在N2O1中通过简单的浸渍-沉淀获得了水合氧化铁(HFO)、水合氧化锰(HMO)、硫化镉(CdS)和零价铁(ZVI)等纳米颗粒,所有纳米颗粒的尺寸都小于5 nm。中试生产表明该合成方法可方便放大,并制备了大量亚5 nm HFO颗粒。关于超微纳米颗粒的合成机理,我们认为在每个在水中溶胀的N201小球内都包含连续均匀水相,使反应物可快速地扩散到树脂球内部(7 s内从小球表面扩散到中心),从而实现纳米颗粒的爆发成核,形成超窄尺寸分布的晶核。此外,交联聚合物链间还可形成狭窄的孔隙(直径<5 nm),可防止在其中形成的纳米颗粒过度生长。由于N201载体具有毫米级尺寸,所制备复合的纳米材料可方便用于连续流装置中。批次实验和柱吸附测试表明,超微HFO颗粒对As(Ⅲ/Ⅴ)的吸附性能比约17 nm的HFO显著增强。本研究有望进一步促进纳米技术在实际水处理中的推广应用。

关键词： Nanoscale effect Nanoconfinement Adsorption Inner-sphere complex Regeneration

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