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| 1 | Influence of high magnetic field on as-cast structure of Cu-25wt.%Ag alloys显示文摘To investigate the influence of high magnetic field (HMF) on the solidification microstructure of Cu-25wt.%Ag alloy, the Cu-25wt.%Ag alloy was prepared under HMF of 12 T, and for comparison, the alloy solidified without HMF was also fabricated. Macro and microstructures of the alloys were observed using the stereomicroscope, and scanning electron microscope, field emission scanning electron microscopy. The weight percentages of the pro-eutectic and eutectic, Cu phase and Ag phase in eutectic, and precipitates of Ag phase in pro-eutectic were analyzed by using of IPP software. Results show that the morphology of the column dendrites changes into cellular dendrites and the grains are refined under HMF of 12 T. Meanwhile, the thickness of the eutectic wall increases, but the sizes of Cu phase and Ag phase and the eutectic lamellar spacings are decreased. The Ag precipitates in the Cu matrix become coarser and sparser. The weight percentage variation of the phases in the microstructure and the Cu-Ag binary phase diagram reveals that the eutectic point moves to the left of the eutectic point in the equilibrium condition and the supersaturated solid solubility of Ag decreases under HMF. | Li Guimao Liu Yan Su Yan Wang Engang Han Ke | 2013 | China Foundry2013，10，3： | 4 |
| 2 | Preparation and SO2 Adsorption Behavior of Coconut Shell-Based Activated Carbon via Microwave-Assisted Oxidant Activation显示文摘A series of oxidants supported on coconut shell-based activated carbon(CAC) through microwave irradiation were prepared and characterized using scanning electron microscopy(SEM), N_2 adsorption/desorption analysis, and X-ray photoelectron spectroscopy(XPS). The SO_2 adsorption capacities and rates were evaluated by adsorption tests performed in a fixed bed reactor with a simulated flue gas, and the adsorption isotherm models were validated against the experimental results. The findings revealed that the SO_2 adsorption capacity decreased in the following order: MW-K_2Cr_2O_7-CAC > MWKMnO_4-CAC > MW-H_2O_2-CAC > MW-CAC. The SO_2 adsorption capacities and adsorption rates of the samples increased with an increasing oxidizability of the oxidants owing to the increment of mean pore size and oxygen-containing functional groups. In addition, a high initial SO_2 concentration and a low bed temperature could positively affect the SO2 adsorption. Finally, the Langmuir model validated that SO_2 was mainly adsorbed through chemical adsorption on the sample surfaces. | Jia Fengrui Li Zhou Wang Engang He Jicheng Dong Hui Liu Guangxin Jian Weiwei | 2018 | China Petroleum Processing & Petrochemical Technology2018，20，1： | 3 |
| 3 | Defect engineering of molybdenum disulfide through ion irradiation to boost hydrogen evolution reaction performance显示文摘The inert basal plane of molybdenum disulfide (MoS2) restrains its further hydrogen evolution reaction (HER) performance.This work attempts ion irradiation to activate inert basal plane of MoS2 nanosheet to improve its electrocatalytic performance.Experimental results demonstrate the sulphur vacancies generated by ion irradiation on the basal plane of MoS2 mainly boost the efficiency of HER performance.The moderate fluence of carbon ion irradiation gains the optimum HER performance with an onset potential of 77 mV and Tafel slope of 66 mV/dec. | Cheng Sun Peipei Wang Hao Wang Chuan Xu Juntong Zhu Yanxia Liang Ying Su Yining Jiang Wenqi Wu Engang Fu Guifu Zou | 2019 | Nano Research2019，12，7： | 3 |
| 4 | Experimental research on solidification structure of alloy 800H by linear electromagnetic stirring显示文摘The solidifi cation structures of alloy 800 H fabricated with and without linear electromagnetic stirring(L-EMS) were investigated. The results show that the solidification structure of the alloy can be obviously affected by the forced convection in melt caused by L-EMS. The average size of equiaxed grains of the alloy with L-EMS decreases from 3.5 mm to 2.3 mm, and the ratio of equiaxed grain increases from 5% to 43% compared with that without L-EMS. The microstructure of the alloy without L-EMS is composed of f ine equiaxed dendrites in the outermost layer and columnar dendrites in other areas, whereas that with L-EMS contains equiaxed dendrites, columnar dendrites and cross dendrites. In addition, the mechanism of dendrite fragment drift was proved by examining the composition change of the main alloying elements in the dendrite trunks at different solidifi cation stage using an electron probe micro-analyzer(EPMA). | Jiang En Wang Engang Deng Anyuan | 2014 | China Foundry2014，11，6： | 2 |
| 5 | Irradiation effects on multilayered W/ZrO 2 film under 4MeV Au ions显示文摘 | Hongwei Wang Yuan Gao Engang Fu Tengfei Yang Jianming Xue Sha Yan Paul K. Chu Yugang Wang | 2014 | 2014 (1-3)2014，，1： | 1 |
| 6 | Stabilization of systems with probabilistic interval input delay and its applications to networked control systems 显示文摘 | YUE Dong TIAN Engang WANG Zidong | 2009 | IEEE Transactions on Systems Man and Cybernetics Part A : Systems and Humans2009，39，4： | 1 |
| 7 | Influence of a low-frequency electromagnetic field on precipitation behavior of a high strength aluminum alloy显示文摘 | Liu Xiaotao Cui Jianzhong Wang Engang | 2005 | Mater Sci Eng A2005，402，： | 1 |
| 8 | Influence of a low-frequency electromagnetic field on precipitation behavior of a high strength aluminum alloy 显示文摘 | Liu Xiaotao Cui Jianzhong Wang Engang etc | 2005 | Mater Sci Eng A2005，，402： | 1 |
| 9 | Stabilization of systems with probabilistic interval input delay and its applica- tions to networked control systems显示文摘 | Yue Dong Tian Engang Wang Zidong | 2009 | IEEE Transactions on Systems Man and Cybernetics Part A: Systems and Hu- mans2009，39，4： | 1 |
| 10 | Corrosion and irradiation behavior of Fe-based amorphous coating in lead-bismuth eutectic liquids显示文摘Lead-bismuth eutectics (LBE) have considerable potential as a candidate material for accelerator-driven sub-critical systems(ADS).However,LBE corrosion and irradiation damage are two urgent challenges remaining to be solved for impellers of primary pumps.In this study,we have explored the possibility of using Fe-based amorphous coatings to overcome LBE corrosion and concurrently to sustain irradiation damage.Specifically,the Fe_(54)Cr_(18)Mo_(2)Zr_(8)B_(18)amorphous coating was prepared by high-velocity oxygen-fuel (HVOF) spraying on 316L steel and exposed to saturated oxygen static LBE for 500 h at 400℃.The coating with high thermal stability (T_(g)=615℃ and T_(x)=660℃) effectively prevented the substrate steel from being corroded by LBE owing to its unique long-range disordered atomic packing.The coating also exhibited strong irradiation resistance when being subjected to 45 dpa (displacement per atom) Au ion irradiation at room temperature,with no sign of crystallization even at the maximum implantation depth of 300 nm.Consequently,the hardness of the coatings before and after irradiation increased slightly.The current findings shed new insights into understanding corrosion mechanism and irradiation behavior of amorphous solids in LBE and expand the application range of amorphous materials. | LU ZhiChao PENG Xiang Yang TANG YuHai HAN ShuYin WU Yuan FU EnGang DING XiangBin HOU Shuo LU GuangYao CAO PeiPei ZHANG YiBo LIU XiongJun MA Dong WANG Hui JIANG SuiHe LU ZhaoPing | 2022 | Science China(Technological Sciences)2022，65，2： | 1 |
| 11 | Influence of a low- frequency electromagnetic field on precipitation behavior of a high strength aluminum alloy 显示文摘 | Liu Xiaotao Cui Jianzhong Wang Engang | 2005 | Mater Sci Eng A2005，402，： | 1 |
| 12 | Impacts of High Field Magnetic Fields on Processing of Selected Materials显示文摘Various composite conductors and reinforcement materials are used for high field magnets in the USA National High Magnetic Field Laboratory.Typical composite conductors are Cu based metal-metal composites,whereas most of reinforcement materials have faced-center-cubic matrix and relatively low ductile-to-brittle transformation temperatures so they can perform at cryogenic temperatures.During the operation of the magnets,the mechanical stresses,magnetic fields and other extreme environments are imposed to the materials and materials are'processed'during the service of the magnets.For instance,the conductors in the magnets are likely to experience higher temperatures than ambient during the operations if the electrical current density for producing high field is sufficiently high.Some of the conductors are fabricated by cold rolling or drawing that introduces lattice distortions and high densities of interfaces in unit volume.High temperature and high field exposure of the conductor may affect the characteristics of the lattice distortions and the interfaces.The lattice distortion and density of the interface affects the mechanical properties of the conductors,such as the tensile and yield strength,as well as the electric conductivity of the composites.Therefore,the materials after service are expected to have different properties compared to as-received conditions.The first portion of our paper will focus on relationship between the service and processing of the magnet materials in high field magnets.The high magnetic field can be used directly to process materials.In some cases,the material properties can be improved by more than 50%if the processing is undertaken in the high magnetic field.The improvement is due to the microstructure changes induced by high magnetic fields.Understanding the behaviors of the materials after they are exposed to high magnetic fields helps us to make good use of the high field processing approach efficiently to fabricate better materials,particularly when the magnetic fields are so high that the cost of building and operation of high field magnets cannot be ignored.In high field processing,phase transformation usually occurs in the magnetic fields.In such cases,one has to consider the impacts of high magnetic fields on critical points,which include transformation temperatures and chemistry,crystallographic structure and habit planes for nucleation and growth,and kinetics.The goal of this portion of research is to understand the microstructure evolution of the selected materials processed in high magnetic fields,and to relate such microstructural features to properties of the materials. | HAN Ke ZHANG Lin WANG Engang ZHOU Xiaoling CUI Baozhi GODDARD Robert WALSH Robert | 2012 | Journal of Iron and Steel Research(International)2012，19，S2： | 0 |
| 13 | Precipitation of α-Fe from Fe_(84-x)Si_(4)B_(12+x)(x=1,3) Amorphous Alloys Under High Magnetic Field Annealing显示文摘This work aims to investigate the effects of high magnetic field annealing(HMFA) on the precipitation of α-Fe from Fe_(84-x)Si_(4)B_(12+ x)( x = 1, 3) amorphous precursors. Isothermal annealing process for Fe_(81)Si_(4)B_(15) and Fe_(83)Si_(4)B_(13) amorphous ribbons has been performed with and without the magnetic field. The magnetic field shows the effects of increasing the nucleation rate and decreasing the grain size of α-Fe crystals simultaneously, during the crystallization processes of the investigated amorphous alloys. By applying HMF, α-Fe crystals with more homogeneous distribution and smaller grain size are achieved in the amorphous matrix, which is crucial helpful to improve the magnetic properties for Fe–Si–B amorphous alloys. The mechanism of HMFA affecting the crystallization microstructure is also discussed in the present work. | Leipeng Duan Kang Wang Engang Wang Peng Jia | 2021 | Acta Metallurgica Sinica(English Letters)2021，34，8： | 0 |
| 14 | Suppression of discontinuous precipitation and strength improvement by Sc doping in Cu-6 wt%Ag alloys显示文摘In low-Ag Cu matrix alloys,the presence of coarse discontinuous precipitates may limit strength.We demonstrated that discontinuous precipitation was suppressed,and continuous precipitation was en-hanced by the doping of Cu-6 wt%Ag with Sc.A high-volume fraction of continuous precipitates,which nucleated on{111}planes,led to a 55 MPa increase in strength,with only a slight decrease in electri-cal conductivity.The addition of Sc inhibited the nucleation of discontinuous precipitates by causing the Sc and the Ag to co-segregate onto grain boundaries,thus forming a thin intermetallic compound layer between grains.After deformation,both discontinuous and continuous precipitates were drawn into Ag fibers.The combination of deformation strain and doping caused an increase in density and a decrease in the diameter of Ag fibers,resulting in about 205 MPa increase in doped samples when the deformation strain reached 4.9.The thinner,denser Ag fibers in the doped samples also caused higher electron scatter-ing at interfaces,leading to electrical conductivity that was 11%IACS lower than in non-doped samples.For reference,100%IACS(International Annealed Copper Standard)is equivalent to 1.7241μΩcm. | Bailing An Rongmei Niu Yan Xin William LStarch Zhaolong Xiang Yifeng Su Robert E.Goddard Jun Lu Theo M.Siegrist Engang Wang Ke Han | 2023 | Journal of Materials Science & Technology2023，，4： | 0 |
| 15 | Magnetic properties and magnetocaloric effects of Gd65(Cu,Co,Mn)35 amorphous ribbons显示文摘The magnetic phase transition and magnetocaloric effects of Gd65(Cu,Co,Mn)35 amorphous ribbons were investigated. The increased Mn substitution for Co or Mn substitution for Cu led into a higher secondorder magnetic phase transformation temperature, near 200 K in all ribbons. Under the field change of 7T, a maximum entropy change(Sm max) of 6 J kg^-1K^-1 was achieved in Gd(65)Cu10Co20Mn5 ribbon and slightly dependent on the compositions. With varied composition, a full width at half of Sm maxwas greatly widened to be over than 180 K for Gd65Cu15Co10Mn(10) ribbon. The refrigeration capacity was also greatly enhanced to 1000J kg^-1 for Gd65Cu20Co10Mn5 ribbon, which was even excellent compared with other Gd-based amorphous systems. | Peng Jia Leipeng Duan Kang Wang Engang Wang | 2019 | Journal of Materials Science & Technology2019，35，10： | 0 |
| 16 | Proton radiation effects on high-speed silicon Mach-Zehnder modulators for space application显示文摘In this paper,performance degradation effects on high-speed silicon Mach-Zehnder modulators under proton radiation were investigated for future space environment applications.The test devices were exposed to 3-MeV protons of three fluence levels(5×10,2×10,and 5×10ions/cm~2),which is comparable to the radiation amount for operating in a harsh space environment after several decades.The performance of the silicon modulator after radiation was characterized in terms of modulation efficiency and eye diagram.The results illustrate that the modulation efficiency is significantly reduced after proton radiation and shows an obvious decrease with increasing radiation fluence.The extinction ratios of the on-off keying(OOK)eye diagram are obviously dropped with increasing radiation fluence and correspond well to modulation efficiency degradation.Furthermore,three representative states for data transmission are demonstrated under three fluences,from still working to the critical state and eventually complete fail.Displacement damage and ionization damage are the two major mechanisms during proton radiation,which lead to the bulk defects and accumulating defect charges and cause performance degradation of silicon Mach-Zehnder modulators. | Changhao HAN Zhaoyi HU Yuansheng TAO Engang FU Yandong HE Fenghe YANG Jun QIN Xingjun WANG | 2022 | Science China(Information Sciences)2022，65，12： | 0 |
| 17 | Synthesis of Ag-Cr thin film metallic glasses with enhanced sulfide-resistance显示文摘The thin film glass forming region of the immiscible Ag-Cr binary system was explored by combinatorial sputtering.The electrochemical behavior of Ag-Cr alloy films with different Cr content in different corrosive environments containing S^2-or Cl-were investigated in comparison with those of pure silver.The Ag-Cr thin film metallic glasses(TFMG)exhibit much enhanced corrosion resistance in 0.01 M K2S solution,comparing with that of the bulk silver,the Ag50 Cr50 TFMG exhibits much higher corrosion potential as well as two orders of magnitude lower corrosion current density.Nevertheless,no obvious improvement of the corrosion resistance can be found for the glassy films in 0.1 M NaCl solution. | Peng jia Ruiwen Huang Suode Zhang Engang Wang Jiahao Yao | 2020 | Journal of Materials Science & Technology2020，52，18： | 0 |
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