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Fabricating CoCrFemnNi high entropy alloy via selective laser melting in-situ alloying

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Journal of materials Science & Technology 2020年第8期36卷 40-43页

作者： peng Chen Sheng Li Yinghao Zhou ming Yan moataz m.Attallah Advanced materials Processing Laboratory University of BirminghamBirmingham B152TTUK Department of materials Science and Engineering and Shenzhen Key Laboratory for Additive Manufacturing of High Performance MaterialsSouthern University of Science and TechnologyShenzhen 518055China

quasi-equiatomic Co Cr Fe mn Ni high entropy alloy(HEA)has been in-situ alloyed by selective laser melting(SLm)from a blend of Co Cr Fe Ni pre-alloyed powder and mn elemental *** blended powder shows good printability with various SLm parameters and the as-built HEA samples achieve a reliable forming *** the slight evaporation of mn,energy dispersive spectrometer mapping and Xray diffraction results show that the as-built HEA has a homogeneous chemical distribution and presents a single face-centred-cubic(fcc)phase,indicating successful in-situ *** study has verified the feasibility of using blended powder to prepare high-quality HEA by SLm.

关键词： High entropy alloys Laser processing Selective laser melting In-situ alloying CoCrFemnNi Crystal structure

Knowledge-Guided Data-Driven model With Transfer Concept for Battery Calendar Ageing Trajectory Prediction

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IEEE/CAA Journal of Automatica Sinica 2023年第1期10卷 272-274页

作者： Kailong Liu qiao peng Remus Teodorescu Aoife m.Foley IEEE the Warwick manufacturing Group University of WarwickCoventry CV47ALUK the School of Control Science and Engineering Shandong UniversityChina the queen’s University Belfast Belfast BT71NNUK the Department of Energy Technology Aalborg UniversityAalborg 9220Denmark

Dear Editor, Lithium-ion(Li-ion) battery has become a promising source to supply and absorb energy/power for many energy-transportation applications. However, Li-ion battery capacity would inevitably degrade over time... 详细信息

关键词： battery Battery Calendar

Coagulation enhanced electrokinetic settling of mature fine oil sands tailings

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International Journal of mining Science and Technology 2019年第2期29卷 199-208页

作者： Shriful Islam Julie q.Shang Department of Civil and Environmental Engineering The University of Western Ontario Department of Civil and Environmental Engineering Shahjalal University of Science and Technology

The mature fine oil sand tailings(mFT) remain as slurry in the tailings pond for long time. The dewatering and consolidation of mFT for sustainable management is an important task for the mining industry. The objective of this study is to accelerate electrokinetic settling of mFT solids in suspensions in presence of optimal coagulant. In the first phase, optimal coagulant and coagulant dosage for settling of suspension are identified, i.e., ferric chloride at 350 mg/L. It is found that the chemical treatment is not much effective; the final solid content of the sediment is only 6.48% from an initial of 5%. In the second phase,combined coagulation and electrokinetic treatment is carried out to enhance the settling effect. The direct electric current is applied in continuous and intermittent modes on mFT suspensions placed in electrokinetic cell. The results show the final solid content reaches 23.74% under the combined application of350 mg/L ferric chloride and 218.75 V/m applied voltage gradient in the continuous mode. The intermittent current mode with 40% save in power consumption produces a settled sediment having 20.84% final solid content.

关键词： Electrokinetics Electrophoresis Coagulation Settling Voltage gradient mFT

High electromechanical reponses of ultra-high-density aligned nano-porous microwave exfoliated graphite oxide/polymer nanocomposites ionic actuators

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International Journal of Smart and Nano materials 2014年第2期5卷 114-122页

作者： m.Ghaffari Y.Zhou m.Lin Chong min Koo q.m.Zhang Department of materials Science and Engineering Materials Research InstituteThe Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Electrical Engineering Materials Research InstituteThe Pennsylvania State UniversityUniversity ParkPA 16802USA materials Research Institute The Pennsylvania State UniversityUniversity ParkPA 16802USA Center for materials Architecturing Institute for Multi-Disciplinary Convergence of MaterialsKorea Institute of Science and Technology(KIST)Hwarangno 14-gil 5Soengbuk-guSeoul 136-791Republic of Korea

High elastic energy density and high-efficiency ionic electromechanical actuators were prepared from aligned activated microwave exfoliated graphite oxide(A-amEGO)/polymer nano-composites,and the electromechanical performance was *** elastic modulus and elastic energy density of the ionic actuators can be tuned over a wide range by varying the polymer(poly(vinylidene fluoride/chlorotrifluoroethylene)[P(VDF-CTFE)])concentration in the nano-composite *** A-amEGO/P(VDF-CTFE)nano-composite actuators with 35 wt.%of polymer content exhibit an elastic energy density higher than 5 J/cm^(3) and an electromechanical conversion efficiency higher than 3.5%,induced under 4 *** results show the promise of high-density highly aligned graphene electrodes for high-performance ionic electromechanical transduction devices.

关键词： nano-porous activated microwave exfoliated graphite oxide(amEGO) actuator self-assembly elastic modulus elastic energy density

Tuning the microstructure for superb corrosion resistance in eutectic high entropy alloy

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Journal of materials Science & Technology 2022年第14期109卷 197-208页

作者： S.Shuang q.Yua X.Gao q.F.He J.Y.Zhang S.q.Shi Y.Yang Department of mechanical Engineering City University of Hong KongKowloon TongKowloonHong KongChina Department of mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of materials Science and Engineering City University of Hong KongKowloon TongKowloonHong KongChina

In this work,we demonstrate that the corrosion resistance of the FeCrNiCoNb_(0.5) eutectic high entropy alloy(EHEA)can be tuned by controlling the size of its eutectic *** microstructure refinement,the EHEA exhibits a superb corrosion resistance in 1 m NaCl in terms of a very low corrosion current density and an ultra-high transpassviation potential,which outperforms a variety of other HEAs and conventional metals and *** the fundamental level,the microstructure refinement results in a rapid formation of a thick and compact passive film with less Cl-adsorption on the EHEA,which results in significant enhancement in its corrosion *** outcome of our research provides important insights into the design of corrosion resistant chemically complex alloys.

关键词： Eutectic high entropy alloy Passivation Transpassivation potential microstructure size

Halo mass of Three-Dimension milky Way

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Chinese Physics Letters 2000年第5期17卷 385-387页

作者： peng Fang peng qiu He Department of Astronomy Nanjing UniversityNanjing 210093 Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center Beijing UniversityBeijing 100871

We emphasize the effects of several factors on halo mass for our Galaxy,such as the disk thickness,the local surface density,and the shape of the rotation *** fitting the observed rotation curve of our Galaxy with the five-component model,we deduce a halo with a mass of 6.62×10^(11)m■within 50kpc and a local density of 0.009m■pc^(-3).It is found that the realistic Galaxy needs only about half of the halo mass that the Galaxy with an inGnitesmally thin disk requires.

关键词： Galaxy curve. rotation

Dispersion of Ultrafast Optical Kerr Effect in No-aggregation Phthalocyanine molecules

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Chinese Physics Letters 1997年第2期14卷 96-99页

作者： GONG qi-huang T.Isoshima m.q.Tian T.Wada H.Sasabe Department of Physics Mesoscopic Physics LaboratoryPeking UniversityBeijing 100871 Frontier Research Program Institute of Physical and Chemical Research(RIKEN)WakoSaitama 351-01Japan

We report dispersion property for femtosecond optical Kerr effect in the solutions of no-aggregation 16(trifluoro ethoxy1)vanadyl phthalocyanine in the wavelength range of 850-770 *** optical Kerr effect spectrum show... 详细信息

关键词： optical Dispersion effect

A modified theta projection model for creep behavior of RPV steel 16mND5

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Journal of materials Science & Technology 2020年第12期47卷 231-242页

作者： peng Yu Weimin ma Division of Nuclear Power Safety Royal Institute of Technology(KTH)Stockholm 10691Sweden

During a hypothetical severe accident of light water reactors,the reactor pressure vessel(RPV) could fail due to its creep under the influence of high-temperature ***,modelling of creep behavior of the RPV is paramount to reactor safety analysis since it predicts the transition point of accident progression from in-vessel to ex-vessel *** the present study we proposed a new creep model for the classical French RPV steel 16 mND5,which is adapted from the "theta-projection model" and contains all three stages of a creep *** curves are expressed as a function of time with five model parameters θ_i(i=1-4 and m).A model parameter dataset was constructed by fitting experimental creep curves into this *** correlate the creep curves for different temperatures and stress loads,we directly interpolate the model’s parameters θ_i(i=1-4 and m) from this dataset,in contrast to the conventional "theta-projection model" which employs an extra single correlation for each θ_i(i=1-4 andm),to better accommodate all experimental curves over the wide ranges of temperature and stress *** also put a constraint on the trend of the creep strain that it would monotonically increase with temperature and stress load.A good agreement was achieved between each experimental creep curve and corresponding model’s *** widely used time-hardening and strain-hardening models were performing reasonably well in the new method.

关键词： 16mND5 steel Creep modelling Tertiary stage Reactor pressure vessel Theta projection model

Facile construction of two-dimensional coordination polymers with a well-designed redox-active organic linker for improved lithium ion battery performance

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Science China Chemistry 2019年第5期62卷 602-608页

作者： Jingwei Liu Lin Zhang Huanhuan Li peng Zhao peng Ren Wei Shi peng Cheng Key Laboratory of Advanced Energy materials Chemistry of ministry of Education College of ChemistryNankai University School of Science Harbin Institute of Technology (Shenzhen) Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Nankai University

A well-designed redox-active organic linker,pyrazine-2,3,5,6-tetracarboxylate(H_4pztc)with brimming active sites for lithium ions storage was utilized to construct coordination polymers(CPs)via a facile hydrothermal *** two isostructural two-dimensional(2D)CPs,namely[m_2(pztc)(H_2O)_6]_n(m=Co for 1 and Ni for 2),delivered excellent reversible capacities and stable cycling performance as anodes in lithium ion *** demonstrated in electrochemical studies,1 and 2 can achieve highly reversible capacities of 815 and 536 mA h g^(-1)at 200 mA g^(-1)for 150 cycles,respectively,best performed for the reported2D-CP-based anode *** electrochemical mechanism studies showed that the remarkable performances can be ascribed to the synergistic Li-storage redox reactions of metal centers and organic *** work highlights the opportunities of using a well-designed organic ligand to construct low-dimensional CPs as new type of electrode materials for advanced lithium ion batteries.

关键词： two-dimensional coordination polymers anode materials lithium ion battery