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Redesigning engineering technology Education: The New Jersey center for advanced Technological Education

Industry and Higher Education 1997年第4期11.0卷 249-252页

作者： Waintraub, Jack L. New Jersey Center for Advanced Technological Education Physics/Electrical Engineering Technology D155 Mill Road PO Box 3050 Edison 08818-3050 NJ United States

The New Jersey center for advanced Technological Education (NJCATE), is dedicated to the improvement of engineering technology education through: the development of innovative educational programmes, such as the Mecomtronics engineering technology curriculum;design and development of instructional methodologies and materials;student recruitment and retention strategies;strong partnerships among educational institutions and with industry, government and professional societies. Changes in any one facet of technician education are not sufficient to bring about the needed improvement in the preparation of a highly skilled technical workforce to meet current and future needs of industry in a highly competitive global economy NJCATE is creating systemic change by taking a holistic approach to the redesign of engineering technician education. The center project is supported by funds from the National Science Foundation's advanced Technological Education Program. © 1997, © 1997 SAGE Publications.

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Role of Stretching-induced Crystallization on Mesoscale Morphology Transition of UHMWPE during Hot Stretching

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Chinese Journal of Polymer Science 2025年第1期43卷 188-198,I0013页

作者： Kai Huang Jia-Jia Mo Wen-Jing Shi Shi-Tong Wang Hong-Hui Shi Chun-Guang Shao Chun-Tai Liu Bao-Bao Chang National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou450002China

In this work,a morphology transition mode is revealed in ultra-high molecular weight polyethylene(UHMWPE)when stretching at 120℃:moving from the slightly deformed region to the necked region,the morphology transfers from small spherulites to a mixture of transcrystalline and enlarged spherulites,and finally to pure transcrystalline;meanwhile,the lamellae making up the transcrystalline or spherulite were fragmented into smaller ones;spatial scan by wide-angle X-ray scattering(WAXS)and small angle X-ray scattering(SAXS)revealed that the crystallinity is increased from 25.3%to 30.1%and the crystal orientation was enhanced greatly,but the lamellae orientation was quite *** rise of enlarged spherulites or a mixture of transcrystalline and spherulites can also be found in UHMWPE stretched at 140 and 148℃,whereas absent in UHMWPE stretched at 30℃.In situ WAXS/SAXS measurements suggest that during stretching at 30℃,the crystallinity is reduced drastically,and a few voids are formed as the size increases from 50 nm to 210 nm;during stretching at 120℃,the crystallinity is reduced only slightly,and the kinking of lamellae occurs at large Hencky strain;during stretching at 140 and 148℃,an increase in crystallinity with stretching strain can be found,and the lamellae are also *** the microstructure and morphology transition into consideration,a mesoscale morphology transition mode is proposed,in the stretching-induced crystallization the fragmented lamellae can be rearranged into new supra-structures such as spherulite or transcrystalline during hot stretching.

关键词： UHMWPE Stretching induced crystallization Lamellae fragmentation Mesoscale structural transition

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Expediting solid electrolyte synthesis: Microwave-assisted wet synthesis of halogen-rich Li-argyrodite

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Journal of Energy Chemistry 2025年第5期104卷 527-539页

作者： Suk-Ho Hwang Seung-Deok Seo Dohyun Kim Jung Been Park Sung-Chul Kim Dong-Wan Kim School of Civil Environmental and Architectural Engineering Korea University Advanced Analysis Center Korea Institute of Science and Technology

Li-argyrodites are promising solid electrolytes （SEs） for solid-state Li-ion batteries （SSLBs）,but their large-scale industrial application remains a *** synthesis methods for SEs suffer from long reaction times and high energy *** this study,we present a wet process for the synthesis of halogen-rich argyrodite Li6-aPS5-aCl1+aprecursors (LPSCl1+a-P,a=0–0.7) via an energysaving microwave-assisted *** vibrational heating,we accelerate the formation of Liargyrodite precursor,even at excessive Cl-ion concentration,which significantly shortens the reaction time compared to traditional *** crystallization,we successfully synthesize the Liargyrodite,Li5.5PS4.5Cl1.5,which exhibits the superior ionic conductivity (7.8 mS cm-1) and low activation energy （0.23 eV） along with extremely low electric *** Li5.5PS4.5Cl1.5exhibits superior Li compatibility owing to its high reversible striping/plating ability （over 5000 h） and high current density acceptability (1.3 mA cm-2).It also exhibits excellent cycle reversibility and rate capability with NCM622 cathode (148.3 mA h g-1at 1 C for 100 cycles with capacity retention of 85.6%).This finding suggests a potentially simpler and more scalable synthetic route to produce high-performance SEs.

关键词： Li-argyrodite Scalable Solid-state batteries Sulfide solid electrolyte Superionic conductor Wet-chemical synthesis

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Deciphering and overcoming the high-voltage limitations of halide and sulfide-based all-solid-state lithium batteries

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Journal of Energy Chemistry 2025年第4期103卷 926-935页

作者： Xiang Qi Gang Wu Meng Wu Dabing Li Chao Wang Lei Gao Shichao Zhang Li-Zhen Fan Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory for Advanced Energy Materials and Technologies University of Science and Technology Beijing School of Materials Science and Engineering Beihang University

Adopting high-voltage Ni-rich cathodes in halide and sulfide-based all-solid-state lithium batteries（ASSLBs） holds great promise for breaking through the 400 Wh ***,both cell configurations are confronted with intricate interfacial challenges in high-voltage regines（>4.5 V）,resulting in inadequate cathode utilization and premature cell ***,contrary to previous studies,coupled with LiNi0.85Co0.1Mn0.05O2cathodes,typical halide（Li2ZrCl6）-based cells at 4.5 V feature unlimited interfacial degradation and poor long cycle stability,while typical sulfide（Li6PS5Cl）-based cells feature self-limited interfacial degradation and poor initial cycle ***,this work addresses the high-voltage limitations of Li2ZrCl6and Li6PS5Cl catholyte-based cells by manipulating electrode mass fraction and tailoring interfacial composition,thereby effectively improving interfacial charge-transfer kinetics and（electro）chemical stability within *** appropriate interface design,both optimized cells at 4.5 V demonstrate remarkably increased initial discharge capacities(>195 mA h g-1at0.1 C),improved cycle stabilities（>80% after 600 cycles at 0.5 C）,and enhanced rate performances(>115 mA h g-1at 1.0 C).This work deepens our understanding of high-voltage applications for halide/sulfide electrolytes and provides generalized interfacial design strategies for advancing high-voltage ASSLBs.

关键词： All-solid-state lithium batteries Halide solid electrolytes High voltage Interface design Sulfide solid electrolytes

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Effect of Mn alloying on the hydrogen-assisted cracking behavior in multiphase/duplex stainless steel

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材料科学技术（英文版） 2025年第4期207卷 126-141页

作者： Menghao Liu Cuiwei Du Xiaogang Li Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and TechnologyUniversity of Science and Technology BeijingBeijing 100083China Key Laboratory for Corrosion and Protection of the Ministry of Education Institute of Advanced Materials & TechnologyUniversity of Science and Technology BeijingBeijing 100083China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China

There remains debate on whether Mn is beneficial or detrimental to hydrogen embrittlement in stainless *** this work,a series of stainless steels were designed to study the change of hydrogen embrit-tlement sensitivity,crack propagation,and hydrogen trapping behaviors upon Mn *** results suggest that adding 4 wt.％Mn increased hydrogen embrittlement susceptibility,whereas adding 8 wt.％Mn decreased hydrogen embrittlement *** banded α'-martensite through austenitic grain is the main reason for the increased hydrogen embrittlement sensitivity when adding 4 wt.％Mn,by ad-sorbing hydrogen,promoting crack initiation,and accelerating crack propagation.

关键词： Hydrogen-assisted cracking Multiphase stainless steel Manganese

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Phase formation mechanism of Cr2AlC MAX phase coating:In-situ TEM characterization and atomic-scale calculations

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材料科学技术（英文版） 2025年第3期206卷 176-184页

作者： Guanshui Ma Haichen Wu Zhi Fang Xiaohui Zhou Rende Chen Wei Yang Jiayue Zhang Zhenyu Wang Aiying Wang Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Analytical Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China Beijing Innovation Centre for Engineering Science and Advanced Technology School of Materials Science and EngineeringPeking UniversityBeijing 100871China

Cr2AlC,a representative MAX phase,gains increasing attention for the excellent oxidation tolerance and corrosion resistance used in harsh high temperature and strong radiation ***,the lack of the phase formation mechanism has become the key bottleneck to the practical applications for Cr2AlC synthesis with high purity at low *** this work,we fabricated the amorphous Cr-Al-C coating by a hybrid magnetron sputtering/cathodic arc deposition technique,in which the in-situ heating transmission electron microscopy(TEM)was conducted in a temperature range of 25-650 ℃ to address the real-time phase transformation for Cr2AlC *** results demonstrated that increas-ing the temperature from 25 to 370 ℃ led to the structural transformation from amorphous Cr-Al-C to the crystalline Cr2Al ***,the high-purity Cr2AlC MAX phase was distinctly formed at 500 ℃,accompanied by the diminished amorphous *** the further increase of temperature to 650 ℃,the decomposition of Cr2AlC to Cr7C3 impurities was *** phase evolution was also evidenced by the Ab-initio molecular dynamics calculations,where the bond energy of Cr-Cr,Cr-Al,and Cr-C played the key role in the formed crystalline stability during the heating *** observa-tions not only provide fundamental insight into the phase formation mechanism for high-purity Cr2AlC coatings but also offer a promising strategy to manipulate the advanced MAX phase materials with high tolerance to high-temperature oxidation and heavy ion radiations.

关键词： Cr2AlC MAX phases In-situ heating transmission electron microscopy Phase formation Bond energy

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Taming of trinitromethyl-oxadiazole to access high density and high oxygen balance via a dual modulation strategy

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Defence technology(防务技术) 2025年第1期43卷 142-149页

作者： Jinya Zhang Teng Fei Jingwei Meng Jinxiong Cai Lei Zhang Siping Pang Chunlin He School of Materials Science&Engineering Beijing Institute of TechnologyBeijing 100081China Experimental Center of Advanced Materials School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China hongqing Innovation Center Beijing Institute of TechnologyChongqing 401120China

Energetic compounds bearing the trinitromethyl group are garnering broad attraction as potential candidates for a new generation of high energy dense *** this work,an effective dual modulation strategy involving both molecular isomerization and crystal morphology control was employed to design and optimize trinitromethyl-oxadiazole with improved comprehensive *** this dual strategy,3,5-bis(trinitromethyl)-1,2,4-oxadiazole(3)was synthesized,resulting in the formation of two distinct crystal morphologies(needle and sheet)corresponding to two crystal forms(3-a and3-b).Encouragingly,while maintaining ultra-high oxygen balance(21.73%),3 achieves impressive densities(1.97-1.98 g/cm^(3)).To our knowledge,the density of 1.98 g/cm^(3)for 3-a sets a new record among that of nitrogen-rich monocyclic ***,practical crystal morphology prediction was creatively introduced to guide the experimental crystallization conditions of 3,increasing the impact sensitivity and friction sensitivity from 1 J to 80 N(3-a)to 10 J and 240 N(3-b),***,the crystal structural analyses and theoretical calculations were conducted to elucidate the reasons of differences between 3-a and 3-b in density and *** work provides an efficient strategy to enhance performance of trinitromethyl derivatives,broadening the path and expanding the toolbox for energetic materials.

关键词： Energetic materials High oxygen balance High density Dual modulation Trinitromethyl group

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Enhanced reactive oxygen species generation: Synergic process of three-electron oxygen reduction and electrochemical ozone production by bimetallic La-Nb oxides

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Journal of Energy Chemistry 2025年第5期104卷 155-165页

作者： Xiaoge Peng Xu Liu Xiaosa Wang Yuanan Li Suiqin Li Yuhang Wang Zhikang Bao Haoqiang Cao Yunyi Cao Xing Zhong Jianguo Wang Institute of Industrial Catalysis State Key Laboratory Breeding Base of Green-Chemical Synthesis Technology Zhejiang University of Technology College of Chemical and Material Engineering Quzhou University Advanced Technology Center Wuxi Little Swan Electric Co. Ltd Innovation Research Center for Advanced Environmental Technology Eco-Industrial Innovation InstituteZJUT

The anodic electrochemical ozone production （EOP） and the cathodic three-electron oxygen reduction reaction （3e-ORR） are effective processes for generating active oxygen species （ROS）.However,the activation of ozone （O3） by hydroxyl radical （OH） to form ROS poses significant *** micelle balllike bimetallic La-Nb oxides （LNOx） have been developed as a bifunctional electrocatalyst for both the EOP and 3e-ORR *** LNO20 demonstrated a 9.8%of Faradaic efficiency （FE） in O3production and a transfer number of 2.8 electrons in the *** calculations support the notion that the five-membered ring mechanism in LNO20 facilitates ***,the incorporation of La provides active sites that enhance the activation of hydrogen peroxide （*H2O2） and the generation of *** innovative approach synergistically integrates EOP and 3e-ORR,enhancing the activation of O3to produce ROS,demonstrating exceptional efficacy in the degradation of organic pollutants and antimicrobial *** study paves the way for designing advanced electrocatalysts for EOP and 3e-ORR and offers insights into utilizing electrochemical method to support other antibacterial strategies.

关键词： Antibacterial Electrochemical ozone production Reactive oxygen species Synergistic electrosynthesis Three electron oxygen reduction reaction

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Status analysis on sputtering and erosion evaluation methods of ion optic systems

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Chinese Journal of Aeronautics 2025年第1期38卷 254-270页

作者： Long MIAO Tongxun YANG Zhengxi ZHU Chang LU Zhiwen WU Ningfei WANG School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Chongqing Innovation Center Beijing Institute of TechnologyChongqing 404100China Advanced Aerospace Power and Energy Research Center Beijing Institute of TechnologyZhuhai 519088China

In the past few decades,ion engines have been widely used in deep-space propulsion and satellite *** aim of extending the thruster lifetime is still one of the most important parts during the design stage of ion *** one of the core components of ion engine,the grid assembly of ion optic systems may experience long-term ion sputtering in extreme electro-thermal environments,which will eventually lead to its structural and electron-backstreaming *** this paper,the current studies of the grid assembly erosion process are systematically analyzed from the aspects of sputtering damage process of grid materials,numerical simulations,and measurements of erosion characteristics of grid *** advantages and disadvantages of various erosion prediction models are highlighted,and the key factors and processes affecting the prediction accuracy of grid assembly erosion patterns are *** different types of experimental methods of grid assembly erosion patterns are *** analysis in this paper is of great importance for selecting the sputter-resistant grid materials,as well as establishing the erosion models and measurement methods to accurately determine the erosion rate and failure modes of grid ***,the working conditions and structure parameters of ion optic systems could be optimized based on erosion models to promote the ion engine lifetime.

关键词： Electric propulsion Ion optic systems Sputtering yield Erosion characteristics Erosion pattern measurement Lifetime evaluation

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STUDY ON SEGREGATION RESISTANCE OF HIGH STRENGTH CONCRETE WITH ELECTRIC ARC FURNACE OXIDIZING SLAG FINE AGGREGATE

Journal of Structural and Construction Engineering

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Journal of Structural and Construction engineering 2025年第827期90卷 1-7页

作者： Yushi, Kato Satoshi, Watanabe Keiki, Yamamoto Tomoya, Nishiwaki Taisei Advanced Center of Technology Taisei Corporation Japan Graduate School of Engineering Tohoku Univ. Japan

Segregation resistance tests were conducted on concrete with electric arc furnace oxidizing slag fine aggregate (ES) or normal fine aggregate (NS) and, segregation index was evaluated. In addition, a method of estimating segregation index was investigated based on mix proportion and flesh test. As a result, coarse aggregate is floated in concrete with ES, and coarse aggregate is settled in concrete with NS due to the difference of density between mortar and coarse aggregate. Furthermore, the possibility estimating segregation index is shown based on density difference between mortar and coarse aggregate and arrival time of 200mm flow of mortar. © 2025 Architectural Institute of Japan. All rights reserved.

关键词： Mortar

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