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Journal of Materials Science & Technology 2000年第1期16卷 55-58页

作者： Cao, FR cui, jz Wen, JL Lei, F Northeastern Univ Sch Met & Mat Dept Mat & Forming Control Shenyang 110006 Peoples R China

Mechanical properties and microstructure evolution of Mg-8.4 wt pet Li alloy have been investigated. The superplastic elongation-to-failure 920% at 573 K and initial strain rate of 5 x 10(-4) s(-1) at low nominal stress 2 MPa has been demonstrated. It was shown through optical microstructure that the average grain sizes at gauge length section before and after superplastic tension and at grip section were 7.5 mu m, 31.7 mu m and 20 mu m respectively, indicating significant deformation induced grain growth and static grain growth. Comparison of experiment data with published data for superplastic Mg-Li alloys shows that fine grain size and about 50 to 50 phase ratio contribute to achieving the largest superplasticity. Some related research works in other alloys are compiled and further evidences to such theoretic argument are provided.

关键词： Magnesium alloys

Fractals in Steel-Aluminum Solid to Liquid Bonding

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Journal of Materials Science & Technology 1999年第5期15卷 486-488页

作者： Zhang, P Du, YH Ren, XP Ba, LM Liu, HW cui, jz Univ Sci & Technol Beijing Sch Mat Sci & Engn Beijing 100083 Peoples R China Anshan Automobile Fittings Factory Anshan 114014 Peoples R China Northeastern Univ Met Forming Dept Shenyang 110006 Peoples R China

This paper studied the fractal characteristic of the interfacial shear surface of steel-Al solid to liquid bonding plate, and determined the relationship between fractal dimension and interfacial shear strength. The research results showed that the relationship between fractal dimension and interfacial shear strength could be described as y=26.2x+4.2 (where y was interfacial shear strength, x was fractal dimension) and when 08Al steel plate was coarsened by steel wire wheel which was made up with steel wires whose diameter were 1.4 similar to 1.6 mm, the optimum coarsening pattern of the steel plate surface could be got, the corresponding maximum interfacial shear surface fractal dimension of the bonding plate was 2.33, and the maximum interfacial shear strength of the bonding plate was 65.3 MPa.

关键词： Nature MPa

Gradient-structure-enhanced dielectric energy storage performance of flexible nanocomposites containing controlled preparation of defective TiO_(2) and ferroelectric KNbO_(3) nanosheets

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Nano Research 2024年第5期17卷 4079-4088页

作者： Yan Wang Lili Zhao Ruicong Chen Wenhui Zhao Dengwei Hu Haoran Wang Bin cui Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education Shaanxi Key Laboratory of Physico–Inorganic Chemistry Xi’an Key Laboratory of Functional Supramolecular Structure and MaterialsCollege of Chemistry and Materials ScienceNorthwest UniversityXi’an 710127China School of Information Science and Technology Northwest UniversityXi’an 710127China Engineering Research Center for Titanium Based Functional Materials and Devices in Universities of Shaanxi Province Faculty of Chemistry and Chemical EngineeringBaoji University of Arts and SciencesBaoji 721013China

Next generation power system needs dielectrics with increased dielectric energy ***,the low energy density of dielectrics limits their ***,an asymmetric trilayered nanocomposite,with a transition layer(TL),an insulation layer(IL),and a polarization layer(PL),is designed based on poly(vinylidene fluoride)-polymethyl methacrylate(PVDF-PMMA)matrix using KNbO_(3)(KN)and TiO_(2)(TO)as the *** morphology and defect control of the two-dimensional nano KN and nano TO fillers are realized via a hydrothermal method to increase the composite breakdown strength(E_(b))and the composite energy density(U_(e)).The asymmetric trilayered structure leads to a gradient electric field distribution,and the KN and TO nanosheets block charges transfer along z *** a result,the development path of the electrical trees is greatly curved,and E_(b) is effectively *** the Ue value of the nanocomposites reaches 17.79 J·cm^(-3) at 523 MV·m^(-1).On the basis,the composite Ue is further improved by defect control in TO *** nanocomposite KN/TO/PVDF-PMMA containing TO with less oxygen vacancy concentration(calcined at oxygen atmosphere)acquires a high Ue of 21.61 J·cm^(-3) at 548 MV·m^(-1).This study provides an idea for improving the energy storage performance by combining the design of the composite dielectric structure and the control of nanofillers’defect and morphology.

关键词： asymmetric trilayered structure two-dimensional energy density oxygen vacancies breakdown strength dielectric

Structural superlubricity at homogenous interface of pentagraphene

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Friction 2024年第9期12卷 2004-2017页

作者： Xinqi ZHANG Jiayi FAN Zichun cui Tengfei CAO Junqin SHI Feng ZHOU Weimin LIU Xiaoli FAN State Key Laboratory of Solidification Processing Center for Advanced Lubrication and Seal MaterialsSchool of Material Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China School of Material Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Two-dimensional(2D)van der Waals layered materials have been widely used as ***-graphene(PG),a 2D carbon allotrope exclusively composed of irregular carbon pentagons has recently been predicted to have superlubricating *** the present study,by combining the molecular dynamics simulation and first-principles calculations,we investigated the frictional property of PG in both commensurate and incommensurate *** calculations show the ultra-low friction at the interface of relatively rotated bilayer PG with twist angles of more than 10°away from the commensurate ***,our calculations demonstrate the isotropy of the ultra-low friction at the interface of incommensurate contact,in contrast to the anisotropic of the commensurate contacting ***,the evolution of friction force and the fluctuation of potential energy along sliding path correlate closely with the interface’s *** energetics and charge density explain the difference between the friction at the interfaces of the commensurate and incommensurate *** only that,we found the correlation between the intrinsic structural feature and interlayer binding ***,our findings on the retainment of the ultra-low friction under work conditions indicates that the superlubricating state of PG has good practical adaptability.

关键词： structural superlubricity penta-graphene molecular dynamics incommensurate contact

Comprehensive insight into the occurrence characteristics,influencing factors and risk assessments of antibiotics in the Chaohu Basin

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Frontiers of Environmental Science & Engineering 2024年第5期18卷 57-71页

作者： Shuanggang Hu Hongzhi Zhang Yongjie Yang Kangping cui Junjie Ao Xuneng Tong Mengchen Shi Yi Wang Xing Chen Chenxuan Li Yihan Chen School of Resources and Environmental Engineering Hefei University of TechnologyHefei230009China Ministry of Education-Shanghai Key Laboratory of Children’s Environmental Health Xinhua HospitalShanghai Jiao Tong University School of MedicineShanghai200092China Department of Civil & Environmental Engineering National University of SingaporeSingapore117576Singapore College of Resources and Environment Anhui Agricultural UniversityHefei230036China

The pollution of antibiotics in aquatic environments has received extensive ***,research on antibiotic contamination in river-lake systems,a significant form of modern aquatic environments,still needs to be *** study focuses on the Chaohu Basin(China)investigating the occurrence characteristics,influencing factors,and risk assessments of antibiotics in the river-lake *** total antibiotic concentrations in the water phase and sediment phase were 3.14–1887.49 ng/L and 0.92–1553.75 ng/g,*** was the predominant antibiotic in the water phase,whereas tetracycline prevailed in the sediment *** differences in concentration and structural composition of antibiotics between the tributaries(river system)and Chaohu Lake were observed,indicating the involvement of various geochemical processes in the attenuation of antibiotics during transport to the receiving *** analysis suggested that the western river is the primary source of antibiotics in Chaohu *** nutrient influx in heavily polluted areas is crucial to addressing the escalating issue of antibiotic pollution in the river-lake *** widespread occurrence of clindamycin in the waters is likely due to wastewater treatment plant discharges,and high-intensity human activities continue to exacerbate antibiotic *** assessment indicated that sulfamethoxazole,tetracycline,lincomycin,and clindamycin ranked in the top four with the highest risks to the most sensitive aquatic ***,the antibiotics presented no risk to consumer *** study provides valuable insights for controlling antibiotic pollution in riverlake systems.

关键词： Antibiotics Occurrence characteristics Influencing factors Risk assessments River-lake system

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宁德时代与滴滴合作布局换电市场

品质 2024年第3期 90-91页

作者： jz 知行(图) 不详

1.1月28日,据宁德时代官方消息,宁德时代与滴滴宣布正式成立换电公司。双方将利用各自的技术和运营优势,从网约车场景切入,为新能源网约车提供换电服务。此次与宁德时代达成合作的是滴滴旗下数字化能源服务平台小桔能源。滴滴与宁德时... 详细信息

1.1月28日,据宁德时代官方消息,宁德时代与滴滴宣布正式成立换电公司。双方将利用各自的技术和运营优势,从网约车场景切入,为新能源网约车提供换电服务。此次与宁德时代达成合作的是滴滴旗下数字化能源服务平台小桔能源。滴滴与宁德时代均对外表示,伴随此次换电合资公司的成立,双方将紧密合作,快速规模化铺设换电站、推广换电车型,提升公共补能市场运营效率,助力全社会绿色可持续发展。

关键词：绿色可持续发展官方消息服务平台网约车新能源合资公司运营效率运营优势

传达关怀与分享的色彩——Pantone2024年度代表色柔和桃

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品质 2024年第2期 82-85页

作者： jz 磨盘(图) 不详

2023年12月,国际色彩预测机构潘通(Pantone)公布了2024年度流行色——柔和桃(13-1023 Peach Fuzz)。这一颜色介于粉色和橙色之间,“如天鹅绒般温柔”“如蒲公英般轻盈”,它会让你联想到很多温柔的事物,比如香甜的桃子、柔软的绸缎、温... 详细信息

2023年12月,国际色彩预测机构潘通(Pantone)公布了2024年度流行色——柔和桃(13-1023 Peach Fuzz)。这一颜色介于粉色和橙色之间,“如天鹅绒般温柔”“如蒲公英般轻盈”,它会让你联想到很多温柔的事物,比如香甜的桃子、柔软的绸缎、温暖的毯子、柔和的腮红或者日出日落时天空的颜色。

关键词：流行色天鹅绒日出日落色彩预测蒲公英粉色腮红桃

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“多巴胺”潮流激活色彩经济

品质 2024年第1期 82-85页

作者： jz 磨盘(图) 不详

2023年,如果要在设计领域找到一些代表性词汇,多巴胺配色一定不会缺席。“多巴胺”这个原本属于心理学的名词,在2023年夏天走红,影响了从服装、美妆、手办到餐饮等各个领域。那么多巴胺究竟是什么?它的流行背后又有着怎样的动因?

关键词：多巴胺心理学美妆

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植物奶卖不动了?

品质 2024年第1期 92-93页

作者： jz 黄晓京(图) 不详

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美容仪身价暴跌背后

品质 2024年第2期 92-93页

作者： jz 黄晓京(图) 不详

1.你有多久没有拿出你的美容仪了?曾几何时,家用美容仪的风潮吹过,引发了“精致的猪猪女孩”们的热烈追捧,主打微电流塑形紧致的Refa,光照类美容仪Exideal,被各路明星种草的射频美容仪雅萌、宙斯以及一众价格不一、型号各异的国产追随者... 详细信息

1.你有多久没有拿出你的美容仪了?曾几何时,家用美容仪的风潮吹过,引发了“精致的猪猪女孩”们的热烈追捧,主打微电流塑形紧致的Refa,光照类美容仪Exideal,被各路明星种草的射频美容仪雅萌、宙斯以及一众价格不一、型号各异的国产追随者们,从电商平台到社交媒体,全方位席卷眼球,也让不少消费者心甘情愿地贡献出了自己的钱包。

关键词：美容仪社交媒体微电流电商平台