检索结果-南通市图书馆

CoMPARISoN oF MATERIAL FoR ENCAPSULATING MINIMoDULES

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 380-384页

作者： Z.Zhang h.Shen x.q.xu W.Chen GuangzhouInstituteofEnergyConversion TheChineseAcademyofSciencesGuangzhou510070China GuangzhouInstituteofEnergyConversion TheChineseAcademyofSciencesGuangzhou510070China／／TheSchoolofPhysicsandEngineeringZhongshanUniversityGuangzhou510640China

The main characteristics of glass, polymethyl methacrylate (PMMA) and polycarbon ate (PC) were presented. The transmittance of glass, PMMA and PC was measured by the UV-VIS spectroscopy analysis. PMMA and PC have the advantages of higher tra nsparency, higher resistance and lower density. It is indicated that both PMMA a nd PC are suitable for encapsulating solar minimodules.

关键词： solar module PMMA PC encapsulate

Reduction effect of final-pass heavy reduction rolling on the texture development,tensile property and stretch formability of ZWK100 alloy plates

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第16期111卷 211-223页

作者： B.q.Shi L.Y.Zhao x.L.Shang B.h.Nie D.C.Chen C.q.Li Y.q.Cheng School of Materials Science and hydrogen Energy Foshan UniversityFoshan 528000China School of Materials and Energy Guangdong University of TechnologyGuangzhouGuangdong 510006China GD Midea Air-Conditioning Equipment Co. Ltd.Foshan 528311China Guangdong Key Laboratory of hydrogen Energy Technology Foshan 528000China YunFu(Foshan)R&D Center of hydrogen Energy Standardization Yunfu 527326China

obviously planar anisotropy due to‘TD split’orthotropic texture(TD indicates Transverse direction)always exist in the Rare-earth(RE)or Ca containing Mg alloy sheets,which is likely caused by the lowreduction rolling(and annealing)as revealed in our previous *** this work,the as-cast billets of a ZWK100 alloy were subjected to final-pass heavy reduction rolling(FhRR)at 500°C with different reductions(30%-70%)after rough rolling,aiming to investigate the reduction effect on the microstructure and texture *** results show that FhRR with higher reductions above 50%is in favor of shear banding formation but has little effect on the as-deformed texture components,and the excellent formability with single-pass reduction up to 70%is mainly ascribed to the activation of prismatic *** with reduction above 50%and annealing can generate uniform grain structures of~10μm and symmetrical‘oblique-line split’texture in(0001)pole figures,with basal poles tilting by about 50°from ND(Normal direction)towards some oblique-line of TD and RD(Rolling direction)as well as uniform distribution of counter lines as an annular shape,resulting in excellent elongation to failure of~50%and ultra-low planar anisotropyΔr_of~0.1 and high stretch formability(Erichsen value:8.1).The formation‘oblique-line split’texture in(0001)pole figures is mainly correlated with the preferred growth tendency of grains with■//RD,which was suggested to relate to the high mobility of some special boundaries such as 40°-45°■.The influences of starting textures on the mechanical properties,planar anisotropy and related deformation modes,as well as their correlations with the stretch formability were comparatively investigated with the‘TD split’orthotropic texture as a counterpoint.

关键词： Magnesium alloys Texture Plane anisotropy Stretch formability Rolled sheets

EFFECTS oF Zn CoNCENTRATIoN oN WETTABILITY oF Sn-Zn ALLoY oN Cu AND oN ThE INTERFACIAL MICRoSTRUCTURE BETWEEN Sn-Zn ALLoY AND Cu

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2006年第4期19卷 251-257页

作者： h.Z. huang x.q. Wei L. Zhou x.D. Liu G.L. Guo School of Materials Science and Engineering Nanchang University Nanchang 330047 China East China Institute of Technology Fuzhou 344000 China

The potential of using a hypoeutectic, instead of eutectic, Sn-Zn alloy as a lead-free solder has been discussed. The nonequilibrium melting behaviors of a series of Sn-Zn alloys were examined by differential thermal analysis. It was found that at a heating rate of 5℃/min, *** exhibited no melting range. Dipping and spreading tests were carried out to characterize the wettability of Sn-Zn alloys on Cu. Both tests exhibited that Sn-6.5Zn has significantly better wettability on Cu than Sn-9Zn. The reaction layers formed during the spreading tests were examined. When the Zn concentration fell between 2.5wt%-9wt%, two reaction layers were formed at the interface, a thick and flat Cu5Zn8 adjacent to Cu and a thin and irregular Cu-Zn-Sn layer adjacent to the alloy. only a Cu0Sn5 layer was formed when the Zn concentration decreased to 0.5wt%. The total thickness of the reaction layer（s） between the alloy and Cu was found to increase linearly with the Zn concentration.

关键词： lead-free solder Sn-Zn alloy wettability interface intermetallic compound

ELECTRoChEMICAL IMPEDANCE SPECTRoSCoPY STUDY oF CoRRoSIoN INhIBITIoN oF MoDIFIED LIGNoSULPhoNATE FoR CARBoN STEEL

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2005年第4期18卷 519-524页

作者： C.h. Yi x. q. qiu D.J. Yang h.M. Lou College of Chemical and Energy Engineering South China University of TechnologyGuangzhou 510640 China

The corrosion inhibition for carbon steel in circulating cooling water by modified lignosulphonate has been investigated using electrochemical impedance spectroscopy technique. Results show that the inhibition efficiency of modified lignosulphonate GCL2 is a great improvement on that of lignosulphonate. The maximum inhibition efficiency of GCL2 reaches 99.21% at the concentration of 400mg·L^-1 at 303K. The corrosion inhibition of GCL2 is attributed to forming adsorption film on the metal surface for the electrochemical impedance spectroscopy in GCL2 solution shows more than one ***,results also indicate that it is more efficient in stirring solution than in still solution for GCL2 because the constant of adsorption in stirring solution is much larger than that in still solution. The adsorption of inhibitor GCL2 follows Langmuir＇s adsorption isotherm.

关键词： electrochemical impedance spectroscopy EIS corrosion inhibition modified lignosulphonate

SUBSTRATE MATERIALS FoR PoLY-CSiTF SoLAR CELLS: oPTIMIZATIoN oF SILICoN ShEET FRoM PoWDER

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 184-188页

作者： q.Ban h.Shen x.J.Wang x.W.Zou Z.C.Liang StateKeyLaboratoryofoptoelectronicMaterialsandTechnologies DepartmentofPhysicsandEngineeringZhongshan（SunYat-sen）UniversityGuangzhou510275China GuangzhouInstituteofEnergyConversion TheChineseAcademyofSciencesGuangzhou510275China

The optimization of silicon sheet from powder (SSP) technology as polycrystalli ne silicon thin film (poly-CSiTF) solar cells' substrate materials is studied by orthogonal design experimental method. Based on technological optimization of S SP prepared from electronic grade silicon powder, SSP solar cell devices with si mple structure are prepared and the effect of SSP substrate is discussed. Up to now, the conversion efficiency of the prepared solar cells on low purity SSP sub strate with fundamental structure has reached 8.25% (with area of 1cm×1cm).

关键词： poly-CSiTF SSP substrate material

Excellent strength-ductility combination in Co_(36)Cr_(15)Fe_(18)Ni_(18)Al_(8)Ti_(4)Mo_(1)multi-principal element alloys by dual-morphology B2 precipitates strengthening

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2023年第3期134卷 60-66页

作者： x.S.Liu R.Li x.F.Fan q.q.Liu x.Tong A.x.Li S.xu h.Yang S.B.Yu M.h.Jiang C.huo P.F.Yu M.T.Dove G.Li State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China College of Computer Science Sichuan UniversityChengdu 610065China School of Physical and Chemical Sciences Queen Mary University of LondonMile End RoadLondon E14NSUnited Kingdom School of Mechanical Engineering Dongguan University of TechnologyDongguan 523808China

Precipitation strengthening provides one of the most widely-used mechanisms for strengthen-ing multi-principal-element alloys(MPEAs).here,we report dual-morphology B2 precipitates in Co_(36)Cr_(15)Fe_(18)Ni_(18)Al_(8)Ti_(4)Mo_(1)MPEA obtained by thermo-mechanical *** microscopy charac-terization reveals that the dual-morphology B2 precipitates are either recrystallized B2 particles formed at the grain boundaries or triple junctions with recrystallization process,or rod-like within the non-recrystallized FCC *** dual-morphology B2 precipitates enhance the yield strength and ultimate tensile strength up to 1120 MPa and 1480 MPa,*** work suggests the mechanical proper-ties of the alloy can be optimized by B2 precipitation strengthening to meet the needs of engineering applications.

关键词： Multi-principal element alloys B2 precipitates heterogeneous nucleation Precipitation strengthening

Three principles for preparing Al wire with high strength and high electrical conductivity

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

Journal of Materials Science & Technology 2019年第5期35卷 742-751页

作者： J.P.hou R.Li q.Wang h.Y.Yu Z.J.Zhang q.Y.Chen h.Ma x.M.Wu x.W.Li Z.F.Zhang Materials Fatigue and Fracture Division Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China National quality Supervision & Inspection Center of Electrical Equipment Safety Performance Zhejiang Huadian Equipment Testing Institute Hangzhou 310015 China Electric Power Research Institute of Liaoning Electric Power Co. Ltd. Liaoning Electric Power Co. Ltd. Shenyang 110006 China Department of Materials Physics and Chemistry School of Materials Science and Engineering Key Laboratory for Anisotropy and Texture of Materials Ministry of Education Northeastern University Shenyang 110819 China

The trade-off relation between the strength and the electrical conductivity has been a Iong-standing dilemma in metallic materials. In the study, three key principles, *** grains, sharp texture and nano-scale precipitates, were presented for preparing Al wire with high strength and high electrical conductivity based on the specially designed experiments for breaking the mutually exclusive relation between the strength and the electrical conductivity. The results show that the elongated grains could lead to a higher electrical conductivity in Al wire without sacrificing the strength;while, the sharp texture can efficiently strengthen the Al wire without influencing the electrical conductivity. Furthermore, nano-scale precipitates with proper size can simultaneously improve the strength and electrical conductivity of Al alloy wire. Under the guidance of the above three key principles, Al wires with high strength and high conductivity were prepared.

关键词： Al wire Texture Precipitates Strength Electrical conductivity

hIGh TEMPERATURE FATIGUE BEhAVIoUR oF A DIRECTIoNALLY SoLIDIFIED CoBALT-BASE SUPERALLoY

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 1998年第2期11卷 111-115页

作者： W.h.JIANG x.D.YAo h.R.GUAN Z.q.hU Chinese Acad of Sciences Shenyang China

The high temperature high cycle fatigue behaviour of a directionally solidified Co-base superalloy was investigated. The alloy has saperior fatigue resistance at 900℃ and its fatigue strength is up to 295MPa. Its σ-Nf curve is characterized by three distinct zones. The stronger dependence of Nf on or in the high .and low stress zones results from multiple fatigue crock initiation sites produced by high stress and oxidation effect in a prolonged exposure, respectively.

关键词： directional solidification Co-base superalloy fatigue fracture

Room-temperature ferroelectricity in A-site ordered Ruddlesden-Popper Li_(2)CaTa_(2)o_(7) ceramics

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2020年第3期6卷 593-599页

作者： B.h.Zhang Z.Z.hu B.h.Chen x.q.Liu x.M.Chen Laboratory of Dielectric Materials School of Materials Science and EngineeringZhejiang UniversityNo.38 Zheda RoadHangzhou310027China

In the present work,the crystal structure,ferroelectric and dielectric properties of the dense single-phase Li_(2)CaTa_(2)o_(7) ceramics with A-site ordered double-layer Ruddlesden-Popper structures have been investigated by the experiments and first-principles calculations.A polar Pna21 phase was determined by the Rietveld refinement against the x-ray diffraction pattern at room temperature,and it was confirmed by its lowest calculated energy and rigid phonon *** ferroelectricity was found by observing the ferroelectric hysteresis loop at room temperature,and its remanent polarization was similar to the value calculated from the Berry phase and Born effective charge *** ferroelectricity is a nonconventional proper one since its polarization is induced from the displacement of oxygen anions instead of tantalum cations based on the individual atomic polarization.A first-order transition from an antiferroelectric to paraelectric phase around 900 K was found by the DSC and variable-temperature dielectric *** the present work,the room-temperature ferroelectricity is experimental confirmed in the present ceramics,inspiring the search for new ferroelectricity in the ceramics with A-site ordered Ruddlesden-Popper structures.

关键词： Ferroelectricity A-site ordered ruddlesden-popper Dielectric response First-principles calculation