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Transactions of Nonferrous Metals Society of China 2024年第10期34卷 3265-3281页

作者： Zhi-xian JIAO qing-zhou wang Yan-jun DING Fu-xing YIN Chao-hui XU Cui-hong HAN Qi-xiang FAN School of Mechanical Engineering Tianjin University of Technology and EducationTianjin 300222China Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and EngineeringHebei University of TechnologyTianjin 300130China School of Materials Science and Engineering Central South UniversityChangsha 410083China Institute of New Materials Guangdong Academy of SciencesGuangzhou 510651China

In order to improve the comprehensive properties of the Cu-11.9Al-2.5Mn shape memory alloy(SMA),multilayer graphene(MLG)carried by Cu_(51)Zr_(14)inoculant particles was incorporated and dispersed into this alloy through preparing the preform of the cold-pressed MLG-Cu_(51)Zr_(14)composite *** the resultant novel MLG/Cu-Al-Mn composites,MLG in fragmented or flocculent form has a good bonding with the Cu-Al-Mn *** can prevent the coarsening of grains of the Cu-Al-Mn SMA and cause thermal mismatch dislocations near the MLG/Cu-Al-Mn *** damping and mechanical properties of the MLG/Cu-Al-Mn composites are significantly *** the content of MLG reaches 0.2 wt.%,the highest room temperature damping of 0.0558,tensile strength of 801.5 MPa,elongation of 10.8%,and hardness of HV 308 can be *** the basis of in-depth observation of microstructures,combined with the theory of internal friction and strengthening and toughening theories of metals,the relevant mechanisms are discussed.

关键词： Cu−Al−Mn shape memory alloy multilayer graphene(MLG) microstructure interface damping mechanical properties

Fabrication and characterization of in situ AlN–TiN/Al composite ribbons

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Rare Metals 2015年第9期34卷 645-649页

作者： Kui wang Chun-Xiang Cui Qian wang qing-zhou wang Hao wang School of Materials Science and Engineering Hebei University of Technology Key Laboratory for New Type of Functional Materials Hebei University of Technology

The conventional wisdom is that the distribution and sizes of reinforcements, as well as the bonding strength of the matrix–reinforcement interface tend to be the crucial factors in determining the resulting properties of composites: the optimum mechanical properties are likely to be achieved when fine and thermally stable reinforcing particles are homogeneously distributed in a metal *** this study, in situ AlN–TiN/Al composite ribbons were successfully synthesized through plasma jet and subsequent melt-spinning method. The distribution and sizes of the particles in the ribbon were systematically *** average grain sizes of AlN and TiN in the AlN–TiN/Al composite ribbon are determined to be 27.7 and 29.6 nm,respectively. Moreover, analysis by scanning electron microscopy(SEM) results reveal that, compared with the AlN–TiN/Al bulk composite, particles like AlN and TiN could be far more homogeneously distributed in the matrix of the ribbon counterpart. In addition, the reinforcing effect of in situ nanoparticles, including AlN and TiN, was discussed as well.

关键词： Melt-spinning Reinforcing effect Nanoparticles

一体化筑塔机在超高索塔施工过程中的技术研究

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建筑机械 2024年第5期 237-241页

作者：刘宁波陈成周清忘中交第二航务工程局有限公司湖北武汉430014

针对目前桥梁工程超高索塔施工的建造现状,存在施工难度大、高空作业事故频发、劳动力密集、施工效率低下且建造成本较高等一系列问题,基于标准化、智能化、工厂化的发展理念,提出一种智能化建造设备一体化筑塔机使用于超高索塔施工。... 详细信息

针对目前桥梁工程超高索塔施工的建造现状,存在施工难度大、高空作业事故频发、劳动力密集、施工效率低下且建造成本较高等一系列问题,基于标准化、智能化、工厂化的发展理念,提出一种智能化建造设备一体化筑塔机使用于超高索塔施工。通过研究该智能化设备在施工过程中的应用优势和不同工况下的荷载分析,为筑塔机在类似工程应用中提供使用价值和相关数据支撑。依托渑淅高速公路项目丹江小三峡特大桥4#墩主塔施工工程实例,对相关技术研究进行详细阐述。

关键词：筑塔机智能化设备超高索塔有限元结构分析

Al−10Nb−3Ce−2.5B孕育剂对Zn−Al共析合金显微组织、阻尼和拉伸力学性能的影响

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Transactions of Nonferrous Metals Society of China 2024年第2期34卷 465-479页

作者：张建军殷福星余晖冀璞光刘力李玉芳焦志娴王清周河北工业大学材料科学与工程学院天津市材料层状复合与界面控制技术重点实验室天津300130 广东省科学院新材料研究所广州510651

制备一种新型Al−10Nb−3Ce−2.5B孕育剂,并系统研究其对锌铝共析(ZA22)合金显微组织、阻尼和拉伸力学性能的影响。结果表明,该孕育剂对ZA22合金中的α相具有显著的细化作用(α相最低可被细化至约16μm),并可使得α相的形貌从粗大枝晶状转... 详细信息

制备一种新型Al−10Nb−3Ce−2.5B孕育剂,并系统研究其对锌铝共析(ZA22)合金显微组织、阻尼和拉伸力学性能的影响。结果表明,该孕育剂对ZA22合金中的α相具有显著的细化作用(α相最低可被细化至约16μm),并可使得α相的形貌从粗大枝晶状转变为细小花瓣状。通过边−边匹配晶体学模型(E2EM)建立孕育剂中CeB_(6)和NbB_(2)颗粒与α相之间的位向关系(ORs),并基于该E2EM模型揭示孕育剂对ZA22合金的细化机理。与未细化ZA22合金相比,孕育细化ZA22合金的高温阻尼性能,特别是逆共析转变阻尼峰得到显著提升。此外,孕育细化ZA22合金的室温拉伸力学性能也得到了显著提高,具有最佳细化效果的ZA22合金的抗拉强度和伸长率分别比未细化ZA22合金的高18.56%和119.04%。对相关机理进行了讨论。

关键词： Zn−Al共析合金孕育剂显微组织细化阻尼拉伸力学性能

Structure and 2p decay mechanism of^(18)Mg

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Nuclear Science and Techniques 2024年第6期35卷 145-154页

作者： Long zhou De-qing Fang Si-Min wang Hui Hua Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Research Center for Theoretical Nuclear Physics NSFC and Fudan UniversityShanghai 200438China School of Physics and State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijing 100871China

The recently discovered,extremely proton-rich nuclide 18 Mg exhibits ground-state decay via two sequential two-proton(2p)emissions through the intermediate nucleus,*** study investigates the structure and the initial 2p decay mechanism of^(18)Mgby examining the density and correlations of the valence protons using a three-body Gamow coupled-channel *** results show that the ground state of^(18)Mgis significantly influenced by the continuum,resulting in a significant s-wave ***,based on the current framework,this does not lead to a significant deviation in mirror symmetry in either the structure or spectroscopy of the 18Mg-18C ***,the time evolution analysis of the^(18)Mgground state suggests a simultaneous 2p emission during the first step of *** observed nucleon-nucleon correlations align with those of the light-mass 2p emitters,indicating a consistent decay behavior within this nuclear region.

关键词： Structure of^(18)Mg Two-proton decay Proton-proton correlation

Nanoscopic tribological characteristics of a cryogenically cycled Zr-based metallic glass

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 113-126页

作者： Qian Jia Qiaosheng Xia qing zhou Yucheng wang Yue Ren Yu Meng Haifeng wang Feng zhou State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi’an 710072China Shaanxi Key Laboratory of Surface Engineering and Remanufacturing Xi’an UniversityXi’an 710065China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Optimized macroscopic tribological behavior can be anticipated in metallic glasses(MGs)by cryogenic cycling treatment(CCT),which is attributed to enhanced ***,the intrinsic friction mechanisms of MGs induced by cryogenic rejuvenation are still poorly *** the present study,nanoscopic wear tests were conducted on the Zr-based MGs surface with different CCT cycles using atomic force microscopy(AFM).After CCT treatment with 100 cycles,the MG displays the highest adhesion and ploughing frictions,but significantly improved anti-wear *** tests and molecular dynamics simulations disclose that the increased adhesion is attributed to the dominance of liquid-like regions in the CCT-treated MGs,and the impact of reduced hardness and weak elastic recovery results in the deteriorated ploughing *** enhanced plasticity effectively dissipates the strain from the AFM tip through multiple shear bands and weakens the adhesion during deformation,giving rise to excellent wear *** study elucidates the promoting effect of CCT on the outstanding antiwear performance of MGs,and is helpful for the development of novel alloys.

关键词： metallic glasses cryogenic cycling treatment nanoscope wear friction mechanism

Preparation of a novel anion exchange group modified hyper-crosslinked resin for the effective adsorption of both tetracycline and humic acid

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Frontiers of Environmental Science & Engineering 2013年第3期7卷 412-419页

作者： qing zhou Mengqiao wang Aimin LI Chendong SHUANG Mancheng ZHANG Xiaohan LIU Liuyan WU State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Nanjing 210046 China

A novel hyper-crosslinked resin （MENQ） modified with an anion exchange group was prepared using divinylbenzene （DVB） and methyl acrylate （MA） as comonomers via four steps： suspension polymerization, post-crosslinking, ammonolysis and alkylation reactions. The obtained resin had both a high specific surface area （793.34 m^2·g^-l） and a large exchange capacity （strong base anion exchange capacity, SEC： 0.74 mmol·g^-l, weak base anion exchange capacity, WEC： 0.45 mmol·g^-l）. XAD-4 was selected as an adsorbent for comparison to investigate the adsorption behavior of tetracycline （TC） and humic acid （HA） onto the adsorbents. The results revealed that MENQ could effectively remove both TC and HA. The adsorption capacity of XAD-4 for TC was similar to that of MENQ, but XAD-4 exhibited poor performance for the adsorption of HA. The adsorption isotherms of TC and HA were well-fitted with the Freundlich model, which indicated the existence of heterogeneous adsorption through cation-n bonding and π-π interactions. The optimal solution condition for the adsorption of TC was at a pH of 5-6, whereas the adsorption of HA was enhanced with increasing pH of the solution.

关键词： high surface area adsorption anion exchange,micropollutant dissolved organic matters

Characteristics and influencing factors of CO_(2) emission from inland waters in China

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Science China Earth Sciences 2024年第6期67卷 2034-2055页

作者： Ting zhou Xiaofeng wang Zuolin XIAO Zhaoyin qing Xianxiang LI Jilong wang Ziyi QUE Chongqing Key Laboratory of Carbon Cycling and Carbon Regulation in Mountainous Ecosystems Chongqing 401331China School of Geography and Tourism Chongqing Normal UniversityChongqing 401331China Chongqing Field Observation and Research Station of Earth Surface Ecological Processes in Three Gorges Reservoir Area Chongqing 405400China School of Earth System Science Tianjin UniversityTianjin 300072China

Inland water bodies,being the most active biogeochemical cycle reactors,play a pivotal role in the global carbon cycle and CO_(2) *** study integrates existing observation dataset of CO_(2) flux(fCO_(2))in rivers,lakes and reservoirs in China,to elucidate their spatial-temporal patterns and key influencing factors and to reappraise the significance for regional carbon *** showed that,the fCO_(2) in rivers,lakes and reservoirs in China presented significant variability with large range of-379.3-4947.6,-160.1-785.0 and -74.0-1603.1 mg CO_(2)m-2h^(-1),*** median of the fCO_(2) in rivers was of 228.5 mg CO_(2)m^(-2)h^(-1),observably higher than these in lakes and reservoirs(26.0 and 28.3 mg CO_(2)m^(-2)h^(-1),respectively).The fCO_(2)in rivers and reservoirs exhibited similar decreasing trend from south to north as a result of universal climate restraint,the averaged fCO_(2) in Pearl River and Yangtze River basins showed much higher than that in Northeastern ***,the averaged fCO_(2) in the Mongolia-Xinjiang lake district and the Northeast lake district were higher than other lake districts,followed by the qinghai-Xizang lake district,and the Eastern and Yungui lake district were generally low,contradicting the climatic *** water primary production enhancement resulting from human activities was the main driver of spatial variation in the fCO_(2) in ***,the fCO_(2) in rivers presented seasonal pattern with higher wet season than dry season,while opposite patterns were found in lakes and *** temperature,precipitation and water primary production were main ***,it showed pH was a key factor indicating the variability of the fCO_(2) levels either in rivers,lakes or in *** lakes,the fCO_(2) is closely linked to chlorophyll a(Chl-a)and dissolved oxygen(DO),whereas,the fCO_(2) in rivers is primarily associated with organic carbon(OC)and total nitrogen(TN),highlighting the dive

关键词： Rivers/lakes/reservoirs CO_(2) emission Spatio-temporal variability Influence factors Regional contribution

Polyoxometalates-derived nanostructures for electrocatalysis application

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Rare Metals 2024年第5期43卷 1845-1866页

作者： Chao-Yue Sun Wen Li Kai wang Wei-Jia zhou Hai-qing wang Institute for Advanced Interdisciplinary Research(iAIR) College of Chemistry and Chemical EngineeringUniversity of JinanJinan250022China Shandong Electrical Engineering and Equipment Group Intelligent Electric Co. Ltd.Jinan 250022China

The conversion of intermittent renewable electrical energy to chemical energy is of great importance which can not only mitigate current energy and environmental crisis but also contribute to the ongoing carbon neutrality national *** is serving as a low-carbon conversion technology that enables green and efficient energy conversion mainly through hydrogen evolution reaction(HER),carbon dioxide reduction reaction(CO_(2)RR),and nitrogen reduction reaction(NRR).The core of electrocatalysis is the design and construction of low-cost high-activity and high-stability electrocatalyst to drive reaction thermodynamics and *** employment of polyoxometalates(POMs)as platforms or precursors to construct different types of electrocatalysts has been widely ***,we systematically summarized the recent advances in POM-derived nanostructures for electrocatalysis *** strategies for precursor design and electrocatalyst synthesis were briefly *** morphology control,phase control,composite modulation,and heterostructure engineering in POM-derived nanostructures were presented in *** structure–activity relationship of POM-derived nanostructures is fully discussed for HER CO_(2)RR,and NRR ***,the current challenges and future outlooks of POM-derived nanostructures are summarized to provide insights toward high-efficiency electrocatalysts for energy conversion technologies.

关键词： Microforming Cylindrical compression Size effects Grain orientation Inhomogeneous deformation

Effective approaches for enhancing the stability of ruthenium-based electrocatalysts towards acidic oxygen evolution reaction

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Chinese Chemical Letters 2024年第10期35卷 126-138页

作者： Qiyan Wu Ruixin zhou Zhangyi Yao Tanyuan wang qing Li State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China

Water splitting with proton exchange membrane water electrolyzers(PEMWE)is regarded as a promising pathway for sustainable hydrogen ***,oxygen evolution reaction(OER)is considered as the dominant factor during the whole process due to the sluggish *** the catalysts,Rubased catalysts draw special attention because of their excellent activity and relatively low ***,the limited stability impedes their further commercialization and tremendous efforts have been devoted to overcome this *** review firstly introduces the basic mechanisms of *** the evaluation protocols and techniques to investigate the stability of Ru-based catalysts are summarized.A detailed elucidation of the possible degradation mechanisms is also critically ***,effective strategies to design durable Ru-based catalysts for acidic OER are *** as heteroatom doping,phase and facet engineering,heterostructure building and support ***,promises,perspectives and challenges in developing highly durable Ru-based catalysts for acidic OER are outlined.

关键词： Acidic oxygen evolution Ru-based catalysts Stability Degradation mechanisms Optimization strategies