检索结果-南通市图书馆

Journal of materials Science & Technology 2021年第36期95卷 29-39页

作者： Yuanyuan Qiao Xiaoying Liu Ning Zhao lawrence c m wu chunying Liu Haitao ma School of materials Science and Engineering Dalian University of TechnologyDalian 116024China Department of materials Science and Engineering City University of Hong KongHong Kong Special Administrative RegionChina

The morphology and orientation evolution of cu_(6)Sn_(5)grains formed on(001)cu and(011)cu single crystal substrates under temperature gradient(TG)were *** initial orientated prism-type cu_(6)Sn_(5)grains transformed to non-orientated scallop-type after isothermal ***,the cu_(6)Sn_(5)grains with strong texture were revealed on cold end single crystal cu substrates by imposing *** cu_(6)Sn_(5)grains on(001)cu grew along their c-axis parallel to the substrate and finally merged into one grain to form a fully Imc joint,while those on(011)cu presented a strong texture and merged into a few dominant cu_(6)Sn_(5)grains showing about 30°angle with the *** merging between neighboring cu_(6)Sn_(5)grain pair was attributed to the rapid grain growth and grain boundary ***,a model was put forward to describe the merging *** different morphology and orientation evolutions of the cu_(6)Sn_(5)grains on single crystal and polycrystal cu substrates were revealed based on crystallographic relationship and cu *** method for controlling the morphology and orientation of cu_(6)Sn_(5)grains is really benefitial to solve the reliability problems caused by anisotropy in 3 D packaging.

关键词： 3D packaging Single crystal cu Temperature gradient Orientation Disregistry Grain boundary migration

Review of precipitation strengthening in ultrahigh-strength martensitic steel

在线全文

学校读者我要写书评

暂无评论

International Journal of minerals,metallurgy and materials 2025年第2期32卷 256-269页

作者： Zhihao Tian chunlei Shang chaolei Zhang Xiaoye Zhou Honghui wu Shuize Wang Guilin wu Junheng Gao Jiaming Zhu Xinping mao Institute for carbon Neutrality University of Science and Technology BeijingBeijing 100083China Institute of Steel Sustainable Technology Liaoning Academy of MaterialsShenyang 110004China Department of materials Science and Engineering Shenzhen MSU-BIT UniversityShenzhen 518172China Institute of materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China School of civil Engineering Shandong UniversityJinan 250061China

martensite is an important microstructure in ultrahigh-strength steels,and enhancing the strength of martensitic steels often involves the introduction of precipitated phases within the martensitic *** considerable research efforts devoted to this area,a systematic summary of these advancements is *** review focuses on the precipitates prevalent in ultrahigh-strength martensitic steel,primarily carbides(e.g.,mc,m_(2)c,and m_(3)c)and intermetallic compounds(e.g.,Ni Al,Ni_(3)X,and Fe_(2)mo).The precipitation-strengthening effect of these precipitates on ultrahigh-strength martensitic steel is discussed from the aspects of heat treatment processes,microstructure of precipitate-strengthened martensite matrix,and mechanical ***,a perspective on the development of precipitation-strengthened martensitic steel is presented to contribute to the advancement of ultrahigh-strength martensitic *** review highlights significant findings,ongoing challenges,and opportunities in the development of ultrahigh-strength martensitic steel.

关键词： ultrahigh-strength martensitic steel precipitation strengthening mechanical property carbide intermetallic compound

Estimation of chloride Diffusivity in Hydrated Tricalcium Silicate Using a Hydration-Diffusion Integrated method

在线全文

学校读者我要写书评

暂无评论

Journal of wuhan University of Technology(materials Science) 2025年第1期40卷 49-64页

作者： WANG Xin SHEN Dejian TAO Sijie LIU Ruixin wu Shengxing college of civil and Transportation Engineering Hohai UniversityNanjing 210098China

This study aims to develop a chloride diffusion simulation method that considers the hydration microstructure and pore solution properties during the hydration of tricalcium silicate(c3S).The method combines the hydration simulation,thermodynamic calculation,and finite element analysis to examine the effects of pore solution,including effect of electrochemical potential,effect of chemical activity,and effect of mechanical interactions between ions,on the chloride effective diffusion coefficient of hydrated c3S *** results indicate that the effect of electrochemical potential on chloride diffusion becomes stronger with increasing hydration age due to the increase in the content of hydrated calcium silicate;as the hydration age increases,the effect of chemical activity on chloride diffusion weakens when the number of diffusible elements decreases;the effect of mechanical interactions between ions on chloride diffusion decreases with the increase of hydration age.

关键词： tricalcium silicate simulation method chloride diffusion coefficient pore solution

Preparation of co/S co-doped carbon catalysts for excellent methylene blue degradation

在线全文

学校读者我要写书评

暂无评论

International Journal of minerals,metallurgy and materials 2025年第1期32卷 169-181页

作者： Haixu Li Haobo He Tiannan Jiang Yunfei Du Zhichen wu Liang Xu Xinjie Wang Xiaoguang Liu Wanhua Yu Wendong Xue School of materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Beijing Jinyu Tongda Refractory Technologies co. Ltd.Beijing 100085China

S and co co-doped carbon catalysts were prepared via pyrolysis of mOF-71 and thiourea mixtures at 800℃at a mass ratio of mOF-71 to thiourea of 1:0.1 to effectively activate peroxymonosulfate(PmS)for methylene blue(mB)*** effects of two different mixing routes were identified on the mB degradation ***,the catalyst obtained by the alcohol solvent evaporation(mOF-AEP)mixing route could degrade 95.60%mB(50 mg/L)within 4 min(degradation rate:K=0.78 min^(-1)),which was faster than that derived from the direct grinding method(mOF-DGP,80.97%,K=0.39 min^(-1)).X-ray photoelectron spectroscopy revealed that the co-S content of mOF-AEP(43.39at%)was less than that of mOF-DGP(54.73at%),and the proportion of c-S-c in mOF-AEP(13.56at%)was higher than that of mOF-DGP(10.67at%).Density functional theory calculations revealed that the adsorption energy of co for PmS was -2.94 eV when sulfur was doped as c-S-c on the carbon skeleton,which was higher than that when sulfur was doped next to cobalt in the form of co-S bond(-2.86 eV).Thus,the c-S-c sites might provide more contributions to activate PmS compared with ***,the degradation parameters,including pH and mOF-AEP dosage,were ***,radical quenching experiments and electron paramagnetic resonance(EPR)measurements revealed that ^(1)O_(2)might be the primary catalytic species,whereas·O~(2-)might be the secondary one in degrading mB.

关键词： advanced oxidation process alcohol solvent evaporation hydrogen bond S and co co-doped carbon catalysts wastewater remediation

Boosting cationic and anionic redox activity of Li-rich layered oxide cathodes via Li/Ni disordered regulation

在线全文

学校读者我要写书评

暂无评论

Journal of Energy chemistry 2025年第1期100卷 533-543页

作者： Zewen Liu Zhen wu Hao Wang Xudong Zhang Yuanzhen chen Yongning Liu Shengwu Guo Shenghua chen Yanli Nan Yan Liu State Key Laboratory for mechanical Behavior of materials Xi'an Jiaotong University School of materials Science and Engineering Xi'an University of Architecture and Technology Hefei Advanced computing center Operation management corp Ltd Network Information center Xi'an Jiaotong University

Lithium-rich layered oxides （LLOs） are increasingly recognized as promising cathode materials for nextgeneration high-energy-density lithium-ion batteries （LIBs）.However,they suffer from voltage decay and low initial coulombic efficiency （IcE） due to severe structural degradation caused by irreversible O ***,we introduce a three-in-one strategy of increasing Ni and mn content,along with Li/Ni disordering and Tm–O covalency regulation to boost cationic and anionic redox activity simultaneously and thus enhance the electrochemical activity of *** target material,Li1.2Ni0.168mn0.558co0.074O2（L1）,exhibits an improved IcE of 87.2%and specific capacity of 293.2 mA h g-1and minimal voltage decay of less than 0.53 m V cycle-1over 300 cycles at 1c,compared to Li1.2Ni0.13mn0.54co0.13O2（Ls）(274.4 mA h g-1for initial capacity,73.8%for IcE and voltage decay of 0.84 mV/cycle over 300 cycles at 1c).Theoretical calculations reveal that the density of states （DOS） area near the Fermi energy level for L1 is larger than that of Ls,indicating higher anionic and cationic redox reactivity than ***,L1 exhibits increased O-vacancy formation energy due to higher Li/Ni disordering of 4.76%（quantified by X-ray diffraction Rietveld refinement） and enhanced Tm–O covalency,making lattice O release more difficult and thus improving electrochemical *** increased Li/Ni disordering also leads to more Ni2+presence in the Li layer,which acts as a pillar during Li+de-embedding,improving structural *** research not only presents a viable approach to designing low-co LLOs with enhanced capacity and IcE but also contributes significantly to the fundamental understanding of structural regulation in high-performance LIB cathodes.

关键词： Ice

Recent research situation in tin dioxide nanomaterials： synthesis, microstructures, and properties

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of materials Science 2013年第3期7卷 203-226页

作者： Zhi-Wen cHEN chan-Hung SHEK c. m. lawrence wu Joseph K. L. LAI Shanghai Applied Radiation Institute School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China Department of Physics and materials Science City University of Hong Kong Tat Chee Avenue Kowloon Tong Hong Kong China

This review article summarizes the new research in solid-state physical chemistry understanding of the microstructure characteristics of semiconductor tin oxide thin films made in the last years in our group. The work mainly focuses on the fabrication technology of semiconductor tin oxides thin films by using pulsed laser deposition （PLD） as well as the application of this technology on new micro- and nanostructured materials. It is an interdisciplinary work that integrates the areas of physics, chemistry and materials science.

关键词： tin dioxide thin film synthesis microstructure nanostructure property

g-c_(3)N_(4)nanosheets coupled with coSe_(2)as co-catalyst for efficient photooxidation of xylose to xylonic acid

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2025年第1期10卷 231-238页

作者： Qi Hao Yijun Liu Ren Zou Ge Shi Shilian Yang Linxin Zhonga wu Yang Xiao chi Yunpeng Liu Shimelis Admassie Xinwen Peng State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou510641GuangdongChina Hainan Key Laboratory of Storage&Processing of Fruits and Vegetables Agricultural Products Processing Research InstituteChinese Academy of Tropical Agricultural SciencesZhanjiangGuangdong524001China Department of chemistry and centre for Advanced 2D materials(cA2Dm)National University of Singapore 3 Science Drive 3 Singapore117543Singapore School of materials Science and Hydrogen Energy Foshan UniversityFoshan528231GuangdongChina Department of chemistry Addis Ababa UniversityPO BOX 1176Addis AbabaEthiopia

Photocatalysis has emerged as an effective approach to sustainably convert biomass into value-added ***_(2)is a promising nonprecious,efficient cocatalyst for photooxidation,which can facilitate the separation of photogenerated electron–holes,increase the reaction rates,and enhance photocatalytic *** this work,we synthesized a stable and efficient photocatalysis system of coSe_(2)/g-c_(3)N_(4)through attaching coSe_(2)on g-c_(3)N_(4)sheets,with a yield of 50.12%for the selective photooxidation of xylose to xylonic *** light illumination,the photogenerated electrons were prone to migrating from g-c_(3)N_(4)to coSe_(2)due to the higher work function of coSe_(2),resulting in the accelerated separation of photogenerated electron–holes and the promoted ***,this study reveals the unique function of coSe_(2),which can significantly promote oxygen adsorption,work as an electron sink and accelerate the generation of$O2-,thereby improving the selectivity toward xylonic acid over other *** work provides useful insights into the design of selective photocatalysts by engineering g-c_(3)N_(4)for biomass high-value utilization.

关键词： Biomass photooxidation Hemicelluloses Xylose g-c_(3)N_(4) Xylonic acid

Smart windows with high optical transparency and structural color

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science china chemistry 2025年

作者： Youtong wu Xueting Li Yiwen Li Hao Wang Yuqi Zhang Xihua Lu college of chemistry and chemical Engineering Donghua University Fujian Nano-micro Advanced materials Sci.& Tech.co.Ltd. Jinjiang Innovation Entrepreneurship and Creativity Park Shanghai Evanston Advanced materials Sci.& Tech.co.Ltd.

In recent years, thermochromic smart windows have played an important role in enhancing energy efficiency and contributing to carbon neutrality in building energy consumption. However, thermal-shielding smart windows with high visible light modulation and structural colors are rarely reported. This study focuses on the development of thermochromic smart windows utilizing poly（N-isopropylacrylamide）(PNIPAm)-based nanogels, which exhibit dynamic solar modulation and high visible light transmission without additional energy input. Unlike traditional electrochromic materials such as tungsten trioxide, these smart windows achieve structural color states through the self-assembly of nanogels, eliminating the need for inorganic materials. The fabricated hydrogel contains thermo-responsive poly（N-isopropylacrylamide-random-acrylic acid-random-N-tert-butyl acrylamide）P（NIPAm-r-AA-r-TBA）(PNTA) nanogels with tunable phase transition temperatures（Tp） that align with ambient *** smart windows demonstrate excellent stability over 100 heating-cooling cycles and significant temperature regulation,achieving an indoor temperature modulation of 10 °c and energy savings of 14.24 KJ m-3compared with normal windows. The production process is simple and scalable, making it feasible for industrial applications. Furthermore, these smart windows offer additional functionalities such as information encryption, adding value to their practical application.

关键词：

High-dose dexamethasone regulates microglial polarization via the GR/JAK1/STAT3 signaling pathway after traumatic brain injury

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第9期20卷 2611-2623页

作者： mengshi Yang miao Bai Yuan Zhuang Shenghua Lu Qianqian Ge Hao Li Yu Deng Hongbin wu Xiaojian Xu Fei Niu Xinlong Dong Bin Zhang Baiyun Liu Beijing Tiantan Hospital Capital Medical UniversityBeijingChina Department of Neurology The First Hospital of Tsinghua UniversityBeijingChina Department of Neurotrauma and Beijing Key Laboratory of central Nervous System Injury Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Department of critical care medicine Beijing Tiantan HospitalCapital Medical UniversityBeijingChina center for Nerve Injury and Repair Beijing Institute of Brain DisordersChina National Clinical Research Center for Neurological DiseasesBeijingChina

Although microglial polarization and neuroinflammation are crucial cellular responses after traumatic brain injury,the fundamental regulatory and functional mechanisms remain insufficiently *** potent anti-inflammato ry agents,the use of glucoco rticoids in traumatic brain injury is still controversial,and their regulatory effects on microglial polarization are not yet *** the present study,we sought to determine whether exacerbation of traumatic brain injury caused by high-dose dexamethasone is related to its regulatory effects on microglial polarization and its mechanisms of *** vitro cultured BV2 cells and primary microglia and a controlled cortical impact mouse model were used to investigate the effects of dexamethasone on microglial ***,dexamethasone,RU486(a glucocorticoid receptor antagonist),and ruxolitinib(a Janus kinase 1 antagonist)were ***-sequencing data obtained from a c57BL/6 mouse model of traumatic brain injury were used to identify potential targets of *** morris water maze,quantitative reverse transcription-polymerase chain reaction,western blotting,immunofluorescence and confocal microscopy analysis,and TUNEL,Nissl,and Golgi staining were performed to investigate our ***-throughput sequencing results showed that arginase 1,a marker of m2 microglia,was significantly downregulated in the dexamethasone group compared with the traumatic brain injury group at3 days post-traumatic brain *** dexamethasone inhibited m1 and m2 microglia,with a more pronounced inhibitory effect on m2microglia in vitro and in *** receptor plays an indispensable role in microglial polarization after dexamethasone treatment following traumatic brain ***,glucocorticoid receptor activation increased the number of apoptotic cells and neuronal death,and also decreased the density of dendritic spines.A possible downstream receptor signaling mechanism is th

关键词： apoptosis BV2 microglia dexamethasone glucocorticoid receptor glucocorticoids innate immune system microglial polarization neuroinflammation primary microglia traumatic brain injury

Enhancing Heat Transfer and Energy Storage Performance of Shell-and-Tube Latent Heat Thermal Energy Storage Unit with Unequal-Length Fins

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2023年第6期32卷 2018-2031页

作者： wu Yangyang LI Dong YANG Ruitong mÜSLÜm Arıcı LIU changyu School of Architecture and civil Engineering Northeast Petroleum UniversityDaqing163318China Engineering Faculty Mechanical Engineering DepartmentKocaeli UniversityUmuttepe CampusKocaeliİzmit41001Turkey

Previous studies in literatures adequately emphasized that inserting fins into phase change material is among the most promising techniques to augment thermal performance of shell-and-tube latent heat thermal energy storage *** this study,the novel unequal-length fins are designed from the perspective of synergistic benefits of heat transfer and energy storage performance,and the effects of arrangement,number and total length of unequal-length fins are numerically *** show that utilization of fins with ascending length,when short and long fins are located in the inlet and outlet of heat transfer fluid respectively,can further promote the heat transfer and energy storage performance compared with equal length fins,and a maximum 6.17%and 0.43%increment of heat transfer performance and stored energy is achieved in full melting time,*** number of unequal-length fins plays a major role in the energy storage,and 18.95%and 0.91%improvement of heat transfer performance and stored energy is realized when equipped with 2 unequal-length fins.A 21.17%improvement of the heat transfer performance is obtained when the total length of unequal-length fins is 18 *** present study is helpful to make further efforts to enhance heat transfer and energy storage of shell-and-tube latent heat thermal energy storage unit with unequal-length fins.

关键词： unequal-length fin enhanced heat transfer energy storage shell and tube heat exchanger Pcm