检索结果-南通市图书馆

Magneto-optical Enhancement Effect in MnBixAl0.15 Films

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Magneto-optical Enhancement Effect in MnBixAl0.15 Films

cognition on oxidation behavior of Ni-based superalloy Gh4742 when exposed to water vapor

1996年中国青年学者物理学讨论会

作者： c.h.shang y.j.wang(Institute of Physics,chinese Academy of Sciences,Beijing 100080)

A giant polar Kerr rotation is observed in MnBiAl alloy films,when x approaches *** a wavelength of 400nm,e.g.,the average Kerr rotation can be as large as 2.06°.The magneto-optical enhancement is attributed to the formation of a new MnBiAl phase.X-ray diffraction confirms that there still exists unreacted MnBi phase in the samples,which leads to an inhomogeneous distribution of Kerr rotations.A linear correlation between Kerr rotation and reciprocal lattice vector is unraveled for the MnBi (Al)alloy *** finding suggests that the enlarged matrix dements due to the hybridization enhancement between Bi 6p and Mn 3d states are responsible for the observed giant magneto-optical Kerr effect.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

journal of Materials Science & Technology 2024年第7期174卷 15-22页

作者： h.Xu S.F.yang E.h.wang c.y.Guo y.S.Liu X.M.hou y.L.Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Institute for carbon Neutrality University of Science and Technology BeijingBeijing 100083China

The oxidation behavior of Ni-based superalloy Gh4742 exposed to water vapor was investigated at 900-1100℃for 50 h in Ar+20%h_(2)O,with Ar+20%O_(2)included for *** presence of h_(2)O is adverse to formation of continuous cr_(2)O_(3)oxide layer but contributes to generation of big *** on this,Ni^(2+)and co^(2+)are more easily to diffuse towards the outermost oxide layer(OOL),forming non-protective Ni-and co-rich oxides with high *** leads to a higher weight gain in Ar+20%h_(2)O than that in Ar+20%O_(2).At elevated temperatures,the spallation of oxide scale occurs while the consumption of cr is reduced in Ar+20%h_(2)O,and the contents of Ni-and co-rich oxides at this moment are reduced in the *** oxidation mechanism was also discussed.

关键词： Gh4742 Superalloy h_(2)O Diffusion Oxidation Mechanism

carbonation of Pure Minerals in Portland cement:Evolution in Products as a Function of Water-to-solid Ratio

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Wuhan University of Technology(Materials Science) 2024年第5期39卷 1214-1222页

作者： XIONG Kun shang Xiaopeng LI hongyan wang Dan Zhengzhou Lutong highway construction co. Ltd.Zhengzhou 450052China (Special Glass Key Lab of hainan Province)&(State Key Laboratory of Marine Resource Utilization in South china Sea) Hainan UniversityHaikou 570228China Department of Architectural Engineering Shandong Urban Construction Vocational CollegeJinan 250103China (State Key Laboratory of high Performance civil Engineering Materials Jiangsu Sobute New Materials Co.Ltd.)&(School of Material Science and EngineeringSoutheast UniversityNanjing 211189China)

Minerals in Portland cement including tricalcium silicate(c_(3)S),β-dicalcium silicate(β-c_(2)S),tricalcium aluminate(c_(3)A),and tetracalcium ferroaluminate(c_(4)AF),show a significantly different activity and product evolution for cO_(2)curing at various water-to-solid *** pure minerals were synthesized and subject to cO_(2)curing in this study to make an in-depth understanding for the carbonation properties of cement-based *** showed that the optimum water-to-solid ratios of c_(3)S,β-c_(2)S,c_(3)A and c_(4)AF were 0.25,0.15,0.30 and 0.40 for carbonation,corresponding to 2 h carbonation degree of 38.5%,38.5%,24.2%,and 21.9%,*** produced calcite duringβ-c_(2)S carbonation decreased as the water-to-solid ratio increased,with an increase in content of metastable cacO_(3)of vaterite and *** thermodynamic stability of cacO_(3)produced during carbonation was c_(3)A>c_(4)AF>β-c_(2)S>c_(3)*** carbonation degree of Portland cement was predicted based on the results of pure minerals and the composition of cement,and the error of predicted production of cacO_(3)was only 1.1%,which provides a potential method to predict carbonation properties of systems with a complex mineral composition.

关键词： accelerated carbonation portland cement calcium carbonate water-to-solid ratio

Recycling of Silicone Rubber from composite Insulator with Pyrolysis Method

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

cSEE journal of Power and Energy Systems 2024年第4期10卷 1787-1798页

作者： Ruiqi shang Liming wang Fanghui yin Masoud Farzaneh Institute of Advanced Technologies in Energy and Electrical Engineering(IAT3E) Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Department of Applied Sciences(DSA) University of Quebec at ChicoutimiChicoutimiQC G7H2B1Canada

composite insulators have been widely used in transmission *** being removed from transmission lines,their housing silicone material cannot degrade *** tackle this problem,this paper proposes an effective method to recycle waste insulators by pyrolysis to obtain mullite(3Al_(2)O_(3)·2SiO_(2))with high purity and compact *** recycling process studied will not generate toxic *** thermal degradation process of housing material is investigated by analyzing its degradation products including the gas and residues in *** experimental results indicate that the colorant agent Fe2O3 inside the housing material is beneficial for the generation of mullite by decreasing the temperature of ***,since the transitional alumina generated by the dehydration of aluminum hydroxide(ATh)has a smaller diameter and can better dissolute into the silica phases,ATh is a better choice as the additional aluminum *** comparing the components,structure,and particle size of grains formed at different calcination temperatures,the proposed pyrolysis temperatures of the two stages are 1400◦c and 1600◦c,respectively.

关键词： composite insulator mullite pyrolysis recycling silicone rubber sintering

Editorial for Multiscale&Multifield coupling in Geomechanics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Rock Mechanics and Geotechnical Engineering 2024年第6期16卷 1919-1921页

作者： Min wang Pengzhi Pan Andrew h.c.chan y.T.Feng T-3 Fluid Dynamics and Solid Mechanics Theoretical DivisionLos Alamos National LaboratoryNew MexicoUSA Institute of Rock and Soil Mechanics Chinese Academy of SciencesWuhanChina School of Engineering University of TasmaniaTasmaniaAustralia college of Engineering Swansea UniversityWalesUK

We are delighted to serve as guest editors for this special issue in the journal of Rock Mechanics and Geotechnical *** purpose of this special issue is dedicated to gathering the latest research work on Multiscale&Multifield coupling in Geomechanics,where we delve into the intricate interplay of various fields and scales that govern the behavior of *** total,30 manuscripts from USA,china,UK,Germany,canada,India and United Arab Emirates are selected to be included in this issue.

关键词： materials. gathering mechanics

Optimization of chemistry and process parameters for control of intermetallic formation in Mg sludges

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Magnesium and Alloys 2024年第4期12卷 1431-1448页

作者： y.Fu G.G.wang A.hu y.Li K.B.Thacker j.P.Weiler h.hu Department of Mechanical Automotive and Materials EngineeringUniversity of Windsor401 Sunset AveWindsorOntario N9B 3P4Canada Global Technology centre Meridian Lightweight Technologies25 MacNab AveStrathroyOntario N7G 4H6Canada

Intermetallic formation in sludge during magnesium(Mg)melting,holding and high pressure die casting practices is a very important ***,very often it is overlooked by academia,original equipment manufacturers(OEM),metal ingot producers and even die *** aim of this study was to minimize the intermetallic formation in Mg sludge via the optimization of the chemistry and process *** Al8Mn5 intermetallic particles were identified by the microstructure analysis based on the Al and Mn *** design of experiment(DOE)technique,Taguchi method,was employed to minimize the intermetallic formation in the sludge of Mg alloys with various chemical compositions of Al,Mn,Fe,and different process parameters,holding temperature and holding *** sludge yield(Sy)and intermetallic size(IS)was selected as two *** optimum combination of the levels in terms of minimizing the intermetallic formation were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,690℃ for the holding temperature and holding at 30 mins for the holding time,*** best combination for smallest intermetallic size were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,630℃ for the holding temperature and holding at 60 mins for the holding time,*** groups of sludge factors,chemical Sludge(cSF),Physical Sludge(PSF)and comprehensive Sludge Factors(and cPSF)were established for prediction of sludge yields and intermetallic sizes in Al-containing Mg *** cPSF with five independent variables including both chemical elements and process parameters gave high accuracy in prediction,as the prediction of the PSF with only the two processing parameters of the melt holding temperature and time showed a relatively large deviation from the experimental *** chemical Sludge Factor was primarily designed for small ingot producers and die casters with a limited melting and holding capacity,of which process parameters could be fixed *** Physical Sludge Factor could be used f

关键词： Magnesium sludge Al-Mn intermetallic Optimization Taguchi method Sludge factor chemical composition Process parameter

Development of Multi-Agent-Based Indoor 3D Reconstruction

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

computers, Materials and continua 2024年第1期81卷 161-181页

作者： cheng h.c. hong F.Z. hussain B. wang y. yue c.P. Optical Wireless Lab Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong

Large-scale indoor 3D reconstruction with multiple robots faces challenges in core enabling technologies. This work contributes to a framework addressing localization, coordination, and vision processing for multi-agent reconstruction. A system architecture fusing visible light positioning, multi-agent path finding via reinforcement learning, and 360° camera techniques for 3D reconstruction is proposed. Our visible light positioning algorithm leverages existing lighting for centimeter-level localization without additional infrastructure. Meanwhile, a decentralized reinforcement learning approach is developed to solve the multi-agent path finding problem, with communications among agents optimized. Our 3D reconstruction pipeline utilizes equirectangular projection from 360° cameras to facilitate depth-independent reconstruction from posed monocular images using neural networks. Experimental validation demonstrates centimeter-level indoor navigation and 3D scene reconstruction capabilities of our framework. The challenges and limitations stemming from the above enabling technologies are discussed at the end of each corresponding section. In summary, this research advances fundamental techniques for multi-robot indoor 3D modeling, contributing to automated, data-driven applications through coordinated robot navigation, perception, and modeling. © 2024 The Authors. Published by Tech Science Press.

关键词： 3D reconstruction multi-agent path finding Multi-agent system multi-robot human collaboration reinforcement learning visible light communication visible light positioning

Rescattering of stimulated Raman side scattering in nonuniform plasmas

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第5期9卷 68-76页

作者： S.Tan Q.wang y.chen W.B.yao c.Z.Xiao j.F.Myatt School of Physics and Electronics Hunan UniversityChangsha 410082China Institute of Applied Physics and computational Mathematics Beijing 100094China School of Electrical and Information Engineering Anhui University of Science and TechnologyHuainanAnhui 232001China Department of Electrical and computer Engineering University of Alberta9211116 St.NWEdmontonAlberta T6G 1H9Canada

Rescattering of stimulated Raman side scattering(SRSS)is observed for the first time via two-dimensional(2D)particle-in-cell(PIc)*** construct a theoretical model for the rescattering process,which can predict the region of occurrence of mth-order SRSS and estimate its *** rescattering process is identified by the 2D PIc simulations under typical conditions of a direct-drive inertial confinement fusion *** electrons produced by second-order SRSS propagate nearly perpendicular to the density gradient and gain nearly the same energy as in first-order SRSS,but there is no cascade acceleration to produce superhot *** studies for a wide range of ignition conditions show that SRSS and associated rescatterings are robust and important processes in inertial confinement fusion.

关键词： nonuniform acceleration scattering

construction of 2D/2D Ti_(3)c_(2)T_(x)MXene/cdS heterojunction with photothermal effect for efficient photocatalytic hydrogen production

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

journal of Materials Science & Technology 2024年第4期171卷 1-9页

作者： T.y.huang Z.yang S.y.yang Z.h.Dai y.j.Liu j.h.Liao G.y.Zhong Z.j.Xie y.P.Fang S.S.Zhang Key Laboratory for Biobased Materials and Energy of Ministry of Education Guangdong Laboratory for Lingnan Modern AgricultureCollege of Materials and EnergySouth China Agricultural UniversityGuangzhou 510643China School of Physics and Optoelectronics South China University of TechnologyGuangzhou 510640China School of chemical Engineering and Energy Technology Guangdong Provincial Key Laboratory of Distributed Energy SystemsDongguan University of TechnologyDongguan 523808China

The insensitivity of semiconductors to visible and infrared light is a key constraint on the utilization of light energy in photocatalytic *** photocatalysts with full-spectrum absorption through surface engineering is an effective approach to fully harnessing light energy in semiconductor ***,a novel stable Ti_(3)c_(2)T_(x)MXene/cdS heterojunction catalyst is obtained by in-situ epitaxial growth of two-dimensional(2D)cdS nanosheets on 2D MXene interface via a solvothermal *** exceptional light absorption properties of MXene confer outstanding full-spectrum driven photocat-alytic hydrogen evolution capability upon the heterogeneous *** unique 2D/2D structure effectively mitigated the recombination of photogenerated carriers,enhancing the photocatalytic performance of the ***,the composite catalyst exhibits a significantly higher surface temperature of 80.4℃under visible light irradiation at an intensity of 0.1 W/cm^(2),which is 1.84 times higher than that of *** irradiation of visible and near infrared light,the composite catalyst with photothermal ef-fect demonstrates a remarkable hydrogen evolution rate of 65.4 mmol g^(-1)h^(-1),which is 7.2 times higher than that of cdS *** study introduces a novel approach for constructing full-spectrum absorption catalysts and expands the application of the photothermal effect in photocatalytic hydrogen evolution research.

关键词： Two-dimensional structure heterostructure Photothermal effect Photocatalyst hydrogen evolution