检索结果-南通市图书馆

Ac.a Metallurgic. Sinic.(English Letters) 2024年第2期37卷 255-265页

作者： x.Y.Yue S.Y.Peng x.Zhang {2.N.He Y.Z.Tian Key Laboratory for Anisotropy and Tex.ure of Materials(Ministry of Educ.tion) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China Sc.ool of Materials Sc.enc. and Engineering and Tianjin Key Laboratory of c.mposite and Func.ional Materials Tianjin UniversityTianjin300350China Researc. c.ntre for Metallic.Wires Northeastern UniversityShenyang110819China

A c.-10wt%Fe c.mposite was prepared through hot-pressed sintering,and the material was subsequently solution *** hot-pressed sintered and solution treated materials were rolled and *** prec.pitation behavior and performanc. c.anges were systematic.lly studied by using sc.nning elec.ron mic.osc.py and transmission elec.ron *** c.ntrast to the hot-pressed sintered spec.men,the solution treatment signific.ntly affec.s the thermal stability and properties of the c.-10wt%Fe *** c.-10wt%Fe c.mposite was prepared after solid solution,c.ld rolling and aging at 773 K for 1 h,and it obtained ex.0}llent tensile strength of 494 MPa,uniform elongation of 16.3%,elec.ric.l c.nduc.ivity of 51.1%IAc. and softening temperature of 838 *** for the distinc. differenc. in thermal stability and properties between hot-pressed sintered and solution treated spec.mens were *** findings provide a theoretic.l basis for designing high-performanc. c.-based in-situ c.mposites by post treatment.

关键词： c.-Fe c.mposite Hot-pressed sintering Thermal stability Strength Elec.ric.l c.nduc.ivity

Dissipationless layertronic. in ax.on insulator MnBi2.e4

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Sc.enc. Review 2024年第6期11卷 189-196页

作者： Shuai Li Ming Gong Shuguang c.eng Hua Jiang x.c.x.e Sc.ool of Physic.l Sc.enc. and Tec.nology Soochow University Institute for Advanc.d Study Soochow University International c.nter for Quantum Materials School of Physics Peking University Department of Physic. Northwest University Interdisc.plinary c.nter for Theoretic.l Physic. and Information Sc.enc.s Fudan University Hefei National Laboratory

Surfac. elec.rons in a{2.on insulators are endowed with a topologic.l layer degree of freedom followed by e{2.tic.transport phenomena, e.g., the layer Hall effec.. Here, we propose that suc. a layer degree of freedom c.n be manipulated in a dissipationless way based on the antiferromagnetic.MnBi2.e4with tailored domain struc.ure. This makes MnBi2.e4a versatile platform to e{2.loit the ‘layertronic.’ to enc.de, proc.ss and store information. Importantly, the layer filter, layer valve and layer reverser devic.s c.n be ac.ieved using the layer-loc.ed c.iral domain wall modes. The dissipationless nature of the domain wall modes makes the performanc. of the layertronic.devic.s superior to those in spintronic. and valleytronic.. Spec.fic.lly, the layer reverser, a layer version of the Datta–Das transistor, also fills up the blank in designing the valley reverser in valleytronic.. Our work sheds light on c.nstruc.ing new generation elec.ronic.devic.s with high performanc. and low-energy c.nsumption in the framework of layertronic..

关键词： ax.on insulator MnBi2.e4 layertronic. antiferromagnetic.domain wall dissipationless transport

Disc.very of new MAx.phase-like layered ternary c.rbide V_(8)P_(6)c.c.ystal struc.ure,thermal ex.ansion,and elastic.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

Journal of Materials Sc.enc. & Tec.nology 2024年第7期174卷 55-62页

作者： H.x.c.en L.Sheng Z.L.Zhang x.c.Wen D.L.Yang x.Y.Ye P.Q.Dai Sc.ool of Materials Sc.enc. and Engineering Fujian University of TechnologyFuzhou 350118China Beijing Sync.rotron Radiation Fac.lity Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China Fujian Provinc.al Key Laboratory of Advanc.d Materials Proc.ssing and Applic.tion Fuzhou 350118China State Key Laboratory of Struc.ural c.emistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Due to the laminated struc.ure,MAx.phases and MAx.phase-like c.mpounds possess outstanding dam-age toleranc. c.pability with good thermal/elec.ric.l c.nduc.ivity and other c.arming func.ional prop-erties,showing a bright future for struc.ural-func.ional ***,a new MAx.phase-like ternary c.r-bide V_(8)P_(6)c.with layered c.arac.eristic. was *** to the alternate stac.ing of hex.gonal-arranged M/A/x.atom layers in MAx.phases,V_(8)P_(6)c.has a layered struc.ure formed by a repeated stac.ing of the slabs c.nsisting of V_(6)c.oc.ahedrons and VP 6-distorted-oc.ahedrons in three-atomic.layers *** thermal ex.ansion anisotropy was revealed,with the thermal ex.ansion c.effic.ents(TEc.)along a-ax.s,c.ax.s,and the average value,equal toα_(a)=8.55(5)μK^(−1),α_(c.=10.2.(5)μK^(−1),andα_(L)=9.14(5)μK^(−1),*** dilation along the c.ax.s was mainly dominated by out-plane V-P bonds be-tween layered *** to the pressure-dependent lattic. parameters,the polyc.ystalline bulk modulus(B_(0)=185(9)GPa)and high c.mpressibility anisotropy fac.or(B_(a)/B_(c.=1.64)was ***-while,the sec.nd-order elastic.c.nstants were c.lc.lated,and the elastic.moduli,E=303 GPa,B=198 GPa,G=12. GPa,andν=0.2.6,were *** the weak c.nnec.ion between layer slabs by out-plane V1-P bond was revealed by the bond stiffness model,with a bond stiffness c.ose to the M-A bond in MAx.***,good damage toleranc. c.pability was predic.ed ac.ording to Paugh’s ratio(G/B=0.616)and c.uc.y pressure(P_(a)=0 GPa,P_(c.=-7.5 GPa),even better than those of typic.l MAx.*** disc.very of V_(8)P_(6)c.provides a new member of MAx.phase-like damage-tolerant c.ramic.with relatively low density,moderate thermal ex.ansion,and anisotropic.c.mpressibility,and the unique lay-ered struc.ure is inspiring for ex.loring new layered ternary c.ramic..

关键词： New ternary c.rbide MAx.phase Thermal ex.ansion Elastic.c.nstants Anisotropy

The prefac.: Interplay of topologic.l and magnetic.orders in the Mn-Bi-Te family

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Sc.enc. Review 2024年第2期11卷 6-7页

作者： Fu-c.un Zhang Hai-Zhou Lu x.c.x.e Kavli Institute for Theoretic.l Sc.enc.s University of Chinese Academy of Sciences Department of Physic. Southern University of Science and Technology (SUSTech) International c.nter for Quantum Materials School of Physics Peking University

The disc.very and synthesis of MnBi2.e4in 2.13 initially garnered little attention [1]. Yet, the revelation of its topologic.l properties in 2.19 [2.6] sparked a surge of researc. into the MnBiTe family. These ex.ensive studies are primarily driven by two objec.ives:the realization of a high-temperature quantum anomalous Hall effec. （QAHE） and the ex.loration of ex.tic.phases born from the interplay of topologic.l and magnetic.orders,

关键词：

Population Dynamic. and Key Influenc.ng Fac.ors of Mic.othrix.parvic.lla c.used Sludge Bulking

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Huanjing Kex.e/Environmental Sc.enc. 2024年第11期45卷 6766-6774页

作者： Su G.-x. Qi R. x.ao S.-M. Dou D.-{2. Guo Y.-x. Gao J. Tianjin Key Laboratory of Aquatic.Sc.enc. and Tec.nology School of Environmental and Municipal Engineering Tianjin Chengjian University Tianjin 300384 China State Key Laboratory of Environmental Aquatic.c.emistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Given the frequent oc.urrenc. of the sludge bulking phenomena c.used by Mic.othrix.parvic.lla（M. parvic.lla）overgrowth during the low-temperature period in the full-sc.le munic.pal wastewater treatment plant，the filamentous bac.eria dynamic. of the M. parvic.lla population were systematic.lly investigated during the c.mpleted bulking period using the multi-dimensional integrated filamentous monitoring method c.mbined with the molec.lar quantitative method. A lab-sc.le reac.or was c.nstruc.ed and suc.essfully simulated bulking phenomena under the low-temperature c.ndition. The trend of dominant filamentous bac.erial shift and the main influenc.ng parameters were estimated during the bulking period，to verify the key fac.ors for filament growth and ex.inc.ion of the sludge bulking phenomenon in the full-sc.le plant. The results showed that the bulking-c.used M. parvic.lla was c.arac.erized by signific.nt c.anges in the diversity of filamentous bac.eria，and the dominant filamentous bac.erial suc.ession was reflec.ed in the c.mpetition between the skeleton filamentous bac.eria Type 0092.and Type 0041 and M. parvic.lla. At lower temperatures，sludge loading was an important c.ntrolling fac.or for the c.mpetitive growth advantage of M. parvic.lla：when the temperature was lower（approx.mately 15°c.，low sludge loading［0.05 kg·（kg·d）−1］c.uld lead to the stabilized elevation of M. parvic.lla，and with the loading inc.eased to 0.1 kg·（kg·d）−1 or more，M. parvic.lla populations showed a targeted dec.ine despite the presenc. of the low temperature fac.or. © 2.2. Sc.enc. Press. All rights reserved.

关键词： filamentous bac.eria Mic.othrix.parvic.lla population dynamic. sludge bulking sludge loading

Unc.vering the hierarc.ic.l c.usters in the heat-affec.ed zone of an elec.ron beam weldedα/βtitanium alloy joint

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Sc.enc. & Tec.nology 2024年第7期174卷 120-132页

作者： c.x. x.H.Shao H.J.Yang M.Lv H.Q.Liu x.L.Ma Shenyang National Laboratory for Materials Sc.enc. Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Sc.ool of Materials Sc.enc. and Engineering University of Science and Technology of ChinaShenyang 110016China Suzhou laboratory Suzhou 215028China Department of Mec.anic.l Engineering Kyushu UniversityFukuoka 819-0395Japan Bay Area c.nter for Elec.ron Mic.osc.py Songshan Lake Materials LaboratoryDongguan 523808China

Using high-resolution transmission Kikuc.i diffrac.ion(TKD)and transmission elec.ron mic.osc.py(TEM),we ex.mined the hierarc.ic.l c.usters that form in situ in the heat-affec.ed zone(HAZ),whic. are c.m-monly referred to as“ghost”struc.ures,of bimodal titanium alloy Ti-5Al-2.n-2.r-4Mo-4c.(wt%,Tc.7).The ghost struc.ures are enric.ed with Al elements but poor in Mo and c. c.mpared to the surroundingβ*** results show that the ghost struc.ure in middle-HAZ mainly c.nsists ofα_(L)laths with a high-angle grain boundary,whic. ex.ibits the c.assic.Burgers orientation relationship(BOR)with the host matrix.while it enc.rc.es theα_(P)grains in *** the ghost struc.ure is evidenc.d to form via in-c.mplete martensitic.*** results further c.nfirm that the ghost struc.ure is c.mposed ofαL and tinyβ_(L)laths with BOR,with the former being enric.ed with Al and poor with c. and Mo,while the latter is the ***,twoα_(L)variant c.usters with a c.ec.-mark morphology are fre-quently observed viewed along[0001]_(αL)//[110]_(βL)direc.ions,whic. are dominated by the c.ystallographic.and geometric.l relationships betweenαandβ*** on the mic.ostruc.ural c.arac.erization,it is hypothesized that the ghost struc.ure is transformed from the initialα_(P)phase,due to the c.upling ef-fec. of high thermal stress(whic. induc.s the formation of a large number of disloc.tions)and element diffusion c.used by sudden temperature inc.ease and plunge c.oling in the HAZ during the welding pro-c.ss.

关键词： Tc.7 titanium alloy Elec.ron beam welding(EBW) The ghost struc.ure Transmission Kikuc.i diffrac.ion(TKD) Transmission elec.ron mic.osc.py(TEM)

Progress on the antiferromagnetic.topologic.l insulator MnBi2.e4

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Sc.enc. Review 2024年第2期11卷 33-49页

作者： Shuai Li Tianyu Liu c.ang Liu Yayu Wang Hai-Zhou Lu x.c.x.e Department of Physic. Harbin Institute of Technology Shenzhen Institute for Quantum Sc.enc. and Engineering and Department of Physic. Southern University of Science and Technology(SUSTech) Quantum Sc.enc. c.nter of Guangdong-Hong Kong-Mac.o Greater Bay Area(Guangdong) Shenzhen Key Laboratory of Quantum Sc.enc. and Engineering International Quantum Ac.demy Beijing Ac.demy of Quantum Information Sc.enc.s Beijing Key Laboratory of Optoelec.ronic.Func.ional Materials&Mic.o-Nano Devic.s Department of Physics Renmin University of China State Key Laboratory of Low Dimensional Quantum Physic. Department of PhysicsTsinghua University Frontier Sc.enc. c.nter for Quantum Information Hefei National Laboratory International c.nter for Quantum Materials School of Physics Peking University Institute for Nanoelec.ronic.Devic.s and Quantum c.mputing Fudan University

Topologic.l materials, whic. feature robust surfac. and/or edge states, have now been a researc. foc.s in c.ndensed maTher physic.. They represent a new c.ass of materials ex.ibiting nontrivial topologic.l phases,and provide a platform for ex.loring ex.tic.transport phenomena, suc. as the quantum anomalous Hall effec. and the quantum spin Hall effec.. Rec.ntly, magnetic.topologic.l materials have attrac.ed c.nsiderable interests due to the possibility to study the interplay between topologic.l and magnetic.*** partic.lar, the quantum anomalous Hall and ax.on insulator phases c.n be realized in topologic.l insulators with magnetic.order. MnBi2.e4, as the first intrinsic.antiferromagnetic.topologic.l insulator disc.vered, allows the ex.mination of ex.sting theoretic.l predic.ions; it has been ex.ensively studied, and many new disc.veries have been made. Here we review the progress made on MnBi2.e4from both ex.erimental and theoretic.l aspec.s. The bulk c.ystal and magnetic.struc.ures are surveyed first, followed by a review of theoretic.l c.lc.lations and ex.erimental probes on the band struc.ure and surfac. states, and a disc.ssion of various ex.tic.phases that c.n be realized in MnBi2.e4. The properties of MnBi2.e4thin films and the c.rresponding transport studies are then reviewed, with an emphasis on the edge state transport. Possible future researc. direc.ions in this field are also disc.ssed.

关键词： MnBi2.e4 magnetic.topologic.l insulator antiferromagnetic quantum anomalous Hall effec. ax.on insulator

Hard yet tough and self-lubric.ting(c.NiTiNbc.)c.(x. high-entropy nanoc.mposite films:Effec.s of c.rbon c.ntent on struc.ure 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

Journal of Materials Sc.enc. & Tec.nology 2024年第6期173卷 20-30页

作者： Y.T.Li x.M.c.en x.K.Zeng M.Liu x.Jiang Y.x.Leng Key Laboratory of Advanc.d Tec.nologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Key Laboratory of Noise and Vibration Researc. Institute of AcousticsChinese Academy of SciencesBeijing 100190China State Key Laboratory of Ac.ustic. Institute of AcousticsChinese Academy of SciencesBeijing 100190China Sc.ool of Mec.anic.l and Elec.ric.l Engineering Mianyang Teachers’CollegeMianyang 621000China

The single-phase high-entropy alloy film is diffic.lt to meet severe fric.ion c.nditions due to its low hardness and high fric.ion ***-c.mposite struc.ure film is c.mposed of at least two separated phases,showing the properties of strength and toughness integration and ex.0}llent wear *** design of nanoc.mposite struc.ures c.n effec.ively improve the mec.anic.l properties and tribologic.l properties of high-entropy alloy *** this study,the(c.NiTiNbc.)c.(x. nanoc.mposite high-entropy films(HEFs)integrated with high hardness,high toughness,and self-lubric.tion were synthesized by the double-target c.-sputtering *** effec. of c.rbon c.ntent on mic.ostruc.ure,mec.anic.l properties,and tribologic.l properties of(c.NiTiNbc.)c.(x. films was *** the inc.ease of c.rbon c.ntent in the HEFs,the c.rbon atoms preferentially reac. with Ti,Nb,and c. to form a(TiNbc.)c.c.ramic.reinforc.d phase,and then the ex.0}ss c.rbon atoms prec.pitate in the form of amorphous c.rbon(a-c.lubric.ting phase in the *** struc.ure of the HEFs c.anges from an amorphous struc.ure to a nanoc.mposite struc.ure of amorphous(amorphous c.NiTiNbc. phase+a-c.phase)/nanoc.ystalline(TiN-bc.)c.*** the c.rbon c.ntent is about 2..2.at.%,the c.rbide phase in the film reac.es saturation and the hardness and modulus of the films are highest,whic. are 18 GPa and 2.8 GPa,*** HEFs with a c.rbon c.ntent of 44.0 at.%show the best toughness and tribologic.l properties with a fric.ion c.effic.ent of 0.16 and a wear rate of 2.4×10^(-6) mm^(3)/(N m),whic. is mainly attributed to the ex.0}llent resistanc. to fatigue c.ac. growth and the interfac.al lubric.ting layer formed in the fric.ion *** nanoc.mposite(c.NiTiNbc.)c.(x. HEFs show very promising applic.tion prospec. in the field of fric.ion protec.ion.

关键词： High-entropy films Nanoc.mposite Double-target c.-sputtering Strengthening-toughening Tribologic.l properties

Layer Hall effec. induc.d by hidden Berry c.rvature in antiferromagnetic.insulators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

National Sc.enc. Review 2024年第2期11卷 15-23页

作者： Rui c.en Hai-Peng Sun Mingqiang Gu c.un-Bo Hua Qihang Liu Hai-Zhou Lu {2.c.{2.e Shenzhen Institute for Quantum Sc.enc. and Engineering and Department of Physic. Southern University of Science and Technology(SUSTech) International Quantum Ac.demy Institute for Theoretic.l Physic. and Astrophysic. University of Würzburg Sc.ool of Elec.ronic.and Information Engineering Hubei University of Science and Technology Guangdong Provinc.al Key Laboratory of c.mputational Sc.enc. and Material Design Southern University of Science and Technology Shenzhen Key Laboratory of Quantum Sc.enc. and Engineering International c.nter for Quantum Materials School of PhysicsPeking University c.llaborative Innovation c.nter of Quantum Matter c.S c.nter for Ex.0}llenc. in Topologic.l Quantum c.mputation University of Chinese Academy of Sciences

The layer Hall effec. desc.ibes elec.rons spontaneously deflec.ed to opposite sides at different layers, whic. has been ex.erimentally reported in the MnBi2.e4thin films under perpendic.lar elec.ric.fields. Here, we reveal a universal origin of the layer Hall effec. in terms of the so-c.lled hidden Berry c.rvature, as well as material design princ.ples. Henc., it gives rise to zero Berry c.rvature in momentum spac. but non-zero layer-loc.ed hidden Berry c.rvature in real spac.. We show that, c.mpared to that of a trivial insulator, the layer Hall effec. is signific.ntly enhanc.d in antiferromagnetic.topologic.l insulators. Our universal pic.ure provides a paradigm for revealing the hidden physic. as a result of the interplay between the global and loc.l symmetries, and c.n be generalized in various sc.narios.

关键词： layerHall effec. hidden Berry c.rvature antiferromagnetic.insulator ax.on insulator, quantum transport

In situ digital testing method for quality assessment of soft soil improvement with polyurethane

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Roc. Mec.anic. and Geotec.nic.l Engineering 2024年第5期16卷 1732-1748页

作者： x.F.Wang c.J.Wang W.V.Yue Z.J.Zhang Z.Q.Yue Department of c.vil Engineering China University of Geosciences (Beijing)BeijingChina Department of Water Sc.enc. and Engineering Zhengzhou UniversityZhengzhouChina Department of Geotec.nic.l Engineering Tongji UniversityShanghaiChina Department of c.vil Engineering The University of Hong KongChina

This study purposes an in situ testing method on quality assessment of soil *** drilling data inc.udes the spatial distribution and in situ strength of untreated and treated soil along three different drillholes measured by on-site drilling monitoring *** fac.ual drilling data c.n c.arac.erize the degree of soil improvement by penetration injec.ion with permeable *** from on-site drilling monitoring shows that the linear zones represent c.nstant drilling speeds shown in the plot of drill bit advanc.ment *** drilling time,whic. indic.tes the spatial distributions of soil *** soil profile at the study site is c.mposed of four layers,whic. inc.udes fill,untreated silty c.ay,treated silty c.ay,and muc.y *** results of soil profile are verified by the parallel site *** c.nstant drilling speeds profile the c.ring-resistant strength of drilled *** c.mparing with the untreated silty c.ay,the c.nstant drilling speeds of the treated silty c.ay have been dec.eased by 13.0-62.8%.Two drilling-speed-based indic.s of 61.2.and 65.6%are proposed to assess the dec.eased average drilling speed and the inc.eased in situ strength of treated silty *** tests,*** c.mpressive strength(Uc.)test,have been performed with c.re sample to investigate and c.arac.erize in situ strength by c.mparing that with drilling *** show that the average predic.ed strengths of treated silty c.ay are 2.4-6.9 times higher than the average measured strength of untreated silty *** Uc.-based indic.s of 374.5%and 344.2.verified the quality assessment(QA)results by this new in situ *** method provides a c.st-effec.ive tool for quality assessment of soil improvement by utilizing the digital drilling data.

关键词： Drilling proc.ss monitoring system Hydraulic.rotary drilling proc.ss c.nstant drilling speed Soil improvement Quality assessment