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Influence of rare earth elements(Y,La and Ce)on the mechanical properties and oxidation resistance of nickel-based superalloys:A critical review

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Journal of Materials Science & Technology 2024年第28期195卷 9-21页

作者： J.G.Li N.Wang J.d.Liu W.Xu School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China The State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110016China

rare-earth elements(rEEs)received special attention and widespread application because of their extremely active chemical *** researches demonstrated that doping of rEEs(Y,La and Ce)in superalloys can significantly improve the high temperature oxidation resistance,corrosion resistance and mechanical properties,which are recognized as a promising route to broaden the manufacturing process window and enhance the overall performance of next-generation *** first part of this review described the special behavior of rEEs during the metallurgical solidification process,including the rEEs loss in the melt and the macro-segregation *** second part summarized a broad spectrum of works reporting the dual role of rEEs addition on the mechanical properties of *** third part overviewed the effect of rEEs on the anti-oxidation resistance of the fourth and fifth nickel-based ***,the prospect of development of rEEs-containing superalloys was discussed.

关键词： rare earth element Oxidation resistance Mechanical properties Nickel-based superalloys

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Thiol-mediated transportation pathway:an approach for improving tumor penetration of nanomedicines in vivo

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Science China Chemistry 2024年第1期67卷 383-389页

作者： Junjie Zhang Weican Sun Xing Wang Senyan Chen Jingying Li Huanghao Yang New Cornerstone Science Laboratory Key Laboratory for Analytical Science of Food Safety and Biology(Ministry of Education)College of ChemistryFuzhou UniversityFuzhou 350116China Department of Chemistry and College of Biological Science and Engineering Fuzhou UniversityFuzhou 350116China

Abnormal tumor microenvironment imposes barriers to tumor penetration of nanomedicine,which remains a major challenge for effective ***,we present disulfide-based nanoparticles that actively penetrate deep tumors in vivo through a thiol-mediated transportation *** achieve active tumor accumulation in vivo,disulfide-based nanoparticles are modified with folic acid units(FA-dBNPs).It is gratifying that FA-dBNPs still enter cells via the thiol-mediated pathway,which facilitates transcellular transportation and tumor penetration both in vitro and in ***,FA-dBNPs exhibit GSH concentration-dependent depolymerization characterization,indicating that the GSH level in tumor tissues regulates the penetration depth of *** from these advantages,FA-dBNPs showed potent anti-tumor activity in mouse models,leading to the significant regression of *** current study lays a foundation that thiol-mediated transportation is a promising approach in nanomedicine design for solid tumor therapy.

关键词： deep penetration thiol-mediated pathway transcellular transportation solid tumor

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Mimicking Nature’s Insects: A review of Bio-inspired Flapping-Wing Micro robots (FWMrs)

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Journal of Bionic Engineering 2025年第2期22卷 458-479页

作者： Chao Liu Tianyu Shen Huan Shen Bo Lu Lining Sun Guodong Chen Wenzheng Chi Robotics and Microsystems Center College of Mechanical and Electrical EngineeringSoochow UniversitySuzhou215021JiangsuChina College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing210016China

Micro aerial vehicles(MAVs)have flexibility and maneuverability,which can offer vast potential for applications in both civilian and military *** to Fixed-wing/rotor-wing MAVs,Flapping Wing Micro robots(FWMrs)have garnered widespread attention among scientists due to their superior miniaturized aerodynamic theory,reduced noise,and enhanced resistance to disturbances in complex and diverse *** insects,it not only has remarkable flapping flight ability(wings),but also takeoff and landing habitat ability(legs).If the various functions of flying insects can be imitated,efficient biomimetic FWMrs can be *** paper provides a review of the flight kinematics,aerodynamics,and wing structural parameters of ***,the traditional wings and folding wings of insect-inspired FWMrs were *** research progress in takeoff and landing of FWMrs was also summarized,and the future developments and challenges for insect-inspired FWMrs were discussed.

关键词： Insect Flapping-Wing Micro robots Bioinspired Takeoff-Landing

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Effect of adaptive laboratory evolution of engineered Escherichia coli in acetate on the biosynthesis of succinic acid from glucose in two-stage cultivation

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Bioresources and Bioprocessing 2024年第1期11卷 489-500页

作者： Jiaping Jiang Yuanchan Luo Peng Fei Zhengtong Zhu Jing Peng Juefeng Lu du Zhu Hui Wu State Key Laboratory of Bioreactor Engineering Shanghai Frontiers Science Center of Optogenetic Techniques for Cell MetabolismSchool of BiotechnologyEast China University of Science and Technology130 Meilong RoadShanghai 200237China MOE Key Laboratory of Bio-Intelligent Manufacturing School of BioengineeringDalian University of TechnologyDalianChina Shanghai Collaborative Innovation Center for Biomanufacturing Technology 130 Meilong RoadShanghai 200237China Key Lab of Bioprocess Engineering of Jiangxi Province College of Life SciencesJiangxi Science and Technology Normal UniversityNanchang 330013China

Escherichia coli MLB(MG1655ΔpflBΔldhA),which can hardly grow on glucose with little succinate accumulation under anaerobic ***-stage fermentation is a fermentation in which the first stage is used for cell growth and the second stage is used for product *** ability of glucose consumption and succinate production of MLB under anaerobic conditions can be improved significantly by using acetate as the solo carbon source under aerobic condition during the two-stage ***,the adaptive laboratory evolution(ALE)of growing on acetate was applied *** assumed that the activities of succinate production related enzymes might be further improved in this *** MLB46-05 evolved from MLB and it had an improved growth phenotype on ***,in MLB46-05,the yield and tolerance of succinic acid in the anaerobic condition of two-stage fermentation were improved *** to transcriptome analysis,upregulation of the glyoxylate cycle and the activity of stress regulatory factors are the possible reasons for the elevated *** the increased tolerance to acetate made it more tolerant to high concentrations of glucose and ***,strain MLB46-05 produced 111 g/L of succinic acid with a product yield of 0.74 g/g glucose.

关键词： Adaptive laboratory evolution E.coli Acetate Succinic acid Two-stage fermentation

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national variability in soil organic carbon stock predictions:Impact of bulk density pedotransfer functions

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International Soil and Water Conservation research 2024年第4期12卷 868-884页

作者： May-Thi Tuyet do Linh Nguyen Van Xuan-Hien Le Giang V.Nguyen Minho Yeon Giha Lee Department of Advanced Science and Technology Convergence Kyungpook National University2559 Gyeongsang-daeroSangju-si37224South Korea Disaster Prevention Emergency Management Institute Kyungpook National University2559 Gyeongsang-daeroSangju-si37224South Korea Thuyloi University 175 Tay SonDong DaHanoi10000Viet Nam

Accurate soil organic carbon storage(SOCS)estimation is crucial for sustaining ecosystem health and mitigating climate change *** study investigated the accuracy and variability of SOCS predictions,focusing on the role of pedotransfer functions(PTFs)in estimating soil bulk density(Bd).Utilizing a comprehensive dataset from the Korean rural development Administration(rdA database),which includes 516 soil horizons,we evaluated 36 widely-used Bd PTFs,well-established formulas that estimate Bd by considering soil properties,including soil organic carbon(SOC),soil organic matter(OM),sand,gravel,silt,and *** PTFs demonstrated varying levels of precision,with root mean squared errors(rMSE)ranging from 0.177 to 0.377 Mg m^(-3) and coefficients of determination(r^(2))from 0.176 to 0.658;hence,the PTFs have been classified into excellent,moderate,and poor-performing groups for predicting ***,a novel PTF based on an exponential function of SOC was developed,showing superior predictive power(r^(2)=0.73)compared to existing PTFs,using an independent validation *** findings reveal significant differences in SOCS predictions and observations among the PTFs,with a p-value<*** highest concentrations of SOCS were noted in forest soils,considerably above the national average,highlighting the importance of tailored soil management practices to enhance carbon *** findings are crucial for refining PTF precision to improve the accuracy of national SOCS estimates,supporting effective land management and climate change mitigation strategies.

关键词： rdA database Soil organic carbon stock prediction Pedotransfer function Bayesian model average regression method

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Automatic extraction of multiple morphological parameters of lunar impact craters

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PHOTOGrAMMETrIC rECOrd 2024年第186期39卷 259-293页

作者： Xiao, Meng Hu, Teng Kang, Zhizhong Zhao, Haifeng Liu, Feng China Univ Geosci Sch Land Sci & Technol Xueyuan Rd Beijing 100083 Peoples R China China Univ Geosci Beijing Res Ctr Lunar & Planetary Remote Sensing Explorat Beijing Peoples R China Minist Educ Peoples Republ China Ctr Space Explorat Subctr Int Cooperat & Res Lunar & Planetary Explor Beijing Peoples R China Univ Chinese Acad Sci Beijing Peoples R China Chinese Acad Sci Technol & Engn Ctr Space Utilizat Key Lab Space Utilizat Beijing Peoples R China Chinese Acad Geol Sci Inst Geomech Beijing Peoples R China

Impact craters are geomorphological features widely distributed on the lunar surface. Their morphological parameters are crucial for studying the reasons for their formation, the thickness of the lunar regolith at the impact site and the age of the impact crater. However, current research on the extraction of multiple morphological parameters from a large number of impact craters within extensive geographical regions faces several challenges, including issues related to coordinate offsets in heterogeneous data, insufficient interpretation of impact crater profile morphology and incomplete extraction of morphological parameters. To address the aforementioned challenges, this paper proposes an automatic extraction method of morphological parameters based on the digital elevation model (dEM) and impact crater database. It involves the correction of heterogeneous data coordinate offset, simulation of impact crater profile morphology and various impact crater morphological parameter automatic extraction. And the method is designed to handle large numbers of impact craters in a wide range of areas. This makes it particularly useful for studies involving regional-scale impact crater analysis. Experiments were carried out in geological units of different ages and we analysed the accuracy of this method. The analysis results show that: first, the proposed method has a relatively effective impact crater centre position offset correction. Second, the impact crater profile shape fitting result is relatively accurate. The r-squared value (r2) is distributed from 0.97 to 1, and the mean absolute percentage error (MAPE) is between 0.032% and 0.568%, which reflects high goodness of fit. Finally, the eight morphological parameters automatically extracted using this method, such as depth, depth-diameter ratio, and internal and external slope, are basically consistent with those extracted manually. By comparing the proposed method with a similar approach, the results demonstrate that

关键词： impact craters morphological parameters profile fitting

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Correlation between multi-factor phase diagrams and complex electrocaloric behaviors in PNZST antiferroelectric ceramic system

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Journal of Advanced Ceramics 2023年第3期12卷 463-473页

作者： Junjie Li ruowei Yin Jianting Li Xiaopo Su Yanjing Su Lijie Qiao Yang Baia Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Sichuan Province Key Laboratory of Information Materials and Devices Application College of Optoelectronic EngineeringChengdu University of Information TechnologyChengdu 610225China Faculty of Mechanical Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China

Ferroelectric(FE)phase transition with a large polarization change benefits to generate large electrocaloric(EC)effect for solid-sate and zero-carbon cooling ***,most EC studies only focus on the single-physical factor associated phase ***,we initiated a comprehensive discussion on phase transition in Pb_(0.99)Nb_(0.02)[(Zr_(0.6)Sn_(0.4))1−xTix]_(0.98)O_(3)(PNZST100x)antiferroelectric(AFE)ceramic system under the joint action of multi-physical factors,including composition,temperature,and electric *** to low energy barrier and enhanced zero-field entropy,the multi-phase coexistence point(x=0.12)in the composition–temperature phase diagram yields a large positive EC peak of maximum temperature change(ΔT_(max))=2.44 K(at 40 kV/cm).Moreover,the electric field–temperature phase diagrams for four representative ceramics provide a more explicit guidance for EC evolution *** the positive EC peaks near various phase transition temperatures,giant positive EC effects are also brought out by the electric field-induced phase transition from tetragonal AFE(AFET)to low-temperature rhombohedral FE(FEr),which is reflected by a positive-slope boundary in the electric field–temperature phase diagram,while significant negative EC responses are generated by the phase transition from AFET to high-temperature multi-cell cubic paraelectric(PEMCC)with a negative-slope phase *** work emphasizes the importance of phase diagram covering multi-physical factors for high-performance EC material design.

关键词： antiferroelectric(AFE) electrocaloric(EC)effect phase diagram phase transition

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Experimental investigation of the relation between the surface integrity and bending fatigue strength of carburized gears

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Science China(Technological Sciences) 2023年第1期66卷 33-46页

作者： CHEN diFa ZHU JiaZan LIU HuaiJu WEI PeiTang MAO TianYu State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China China Gas Turbine Establishment Chengdu 710025China

Bending fatigue is an essential parameter that needs to be considered in the improvement process of the power density and reliability of gear drives. Quantitative relations among the manufacturing parameters, surface integrities, and fatigue performance are not clear, which seriously limits the effectiveness of an anti-fatigue design. For this work, tooth-bending fatigue tests of carburized gears with different surface integrities were performed using a pulsator. The effects of the manufacturing parameters and surface integrities on the gear fatigue, such as surface hardness and residual stress, were investigated. The experimental results revealed that due to the improvement of surface integrities after shot peening, the nominal bending stress number(fatigue limit) increased by 6.3%–31.1%, with an amplitude range of 39–143 MPa. A supervised learning algorithm of a random forest was implemented to determine the contribution of the surface hardness and surface residual stress to the nominal stress number. An empirical formula was proposed to predict the nominal stress number considering the surface integrities. The prediction error was less than 7.53%, as verified by several gear-bending fatigue tests. This provided theoretical support for the modern, anti-fatigue design of the gears.

关键词： carburized gear surface integrity bending fatigue design formula

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High-Performance rotating Structure Triboelectric-Electromagnetic Hybrid Nanogenerator for Environmental Wind Energy Harvesting

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ACS APPLIEd MATErIALS & INTErFACES 2024年第45期16卷 62254-62263页

作者： Cao, Zhi Zhou, Hanlin Han, Chengcheng Jing, Haitao Wang, Zhong Lin Wu, Zhiyi Guangzhou Inst Blue Energy Guangzhou 510555 Peoples R China Chinese Acad Sci Beijing Inst Nanoenergy & Nanosyst Beijing 101400 Peoples R China Univ Chinese Acad Sci Sch Nanosci & Technol Beijing 100049 Peoples R China Georgia Inst Technol Sch Mat Sci & Engn Atlanta GA 30332 USA

As environmental energy harvesting gains increasing importance in self-powered systems and large-scale energy demands, wind energy, as a clean, pollution-free, and renewable source, has garnered widespread attention. However, achieving efficient wind energy collection remains challenging. This study proposes a high-performance rotating structure triboelectric-electromagnetic hybrid nanogenerator designed for environmental wind energy harvesting. By optimizing the magnetic circuit design of the electromagnetic generator, the dispersed radial magnetic field is converted into a unified axial magnetic field, enabling efficient power generation with only a single annular coil, thereby simplifying the generator design and reducing manufacturing and maintenance costs. Additionally, a triboelectric nanogenerator design with soft contact friction between polycarbonate (PC) fur and fluorinated ethylene propylene (FEP) film was implemented, optimizing the spacing between the electrode and friction layers, thus enhancing output performance and device durability. Furthermore, we simulated and experimentally tested the output waveform of the designed hybrid generator structure, with the results showing a high degree of similarity, further validating the rationality of the device design and providing guidance for structural optimization. Subsequently, we achieved efficient energy storage using an energy management circuit (EMC). With the integration of the EMC, the generator successfully powered a Bluetooth temperature and humidity sensor at a wind speed of 10 m/s, achieving wireless transmission, and demonstrating its potential application in traffic signal systems and other natural environmental systems. This research provides an important reference for further exploration of novel wind energy harvesting technologies.

关键词： triboelectric-electromagnetic hybrid nanogenerator magnetic circuit design wind energy harvesting energy management circuit simulation analysis

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Advancing the recovery of iron and rare earth elements from the solid waste at Bayan Obo

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International Journal of Mining Science and Technology 2025年第2期35卷 295-306页

作者： Na Zhao Qiang Zhang Hongwei Ma Yongsheng Sun Peng Gao Zhao Cao Zhenyue Zhang School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China Mineral Processing Plant of Jinchuan Group Nickel Cobalt Co. Ltd.Jinchang 737100China School of Mining and Coal Engineering Inner Mongolia University of Science and TechnologyBaotou 014010China School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan 430074China

The storage of solid waste in Bayan Obo has resulted in significant resource wastage and environmental *** this study,an efficient process was developed to recover iron and rare earth elements(rEEs)from this waste by processes of hydrogen-based mineral phase transformation(HMPT),magnetic separation,and *** optimal HMPT conditions(525℃,12.5 min,and 30%H_(2)concentration),an iron concentrate with a TFe grade of 64.09%and a recovery of 95.33%was *** magnetic properties of the solid waste were greatly enhanced by HMPT,allowing the effective magnetic separation of iron *** optimization of the flotation process resulted in a rEEs concentrate with a rare earth oxide(rEO)grade of 65%-70%and a rEEs recovery of 60%-65%.Hematite was reduced to magnetite during HMPT,and bastnaesite was decomposed to rEEs oxides and fluorides,and the particle structure was significantly ***,changes in monazite,fluorite,and barite were minimal.

关键词： Hydrogen-based mineral phase transformation Flotation reduction characteristics Microstructure evolution Surface chemistry

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