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| 1 | INTERFACE REACTION IN MAGNETIC MULTILAYERS显示文摘Ta/NiO/NiFe/Ta multilayers were prepared by rf reactive and dc magnetron sputtering. The exchange coupling field (Hex) between NiO and NiFe reached 120Oe. The composition and chemical states at the interface region of NiO/NiFe were studied using the x-ray photoelectron spectroscopy (XPS) and peak decomposition technique. The results show that there are two thermodynamically favorable reactions at NiO/NiFe interface: NiO+Fe=Ni+FeO and 3NiO+2Fe = 3Ni+Fe2O3. The thickness of the chemical reaction as estimated by angle-resolved XPS was about 1-1.5nm. These interface reaction products are magnetic defects, and we believe that the Hex and the coercivity (Hc) of NiO/NiFe are affected by these defects. Moreover, the results also show that there is an 'intermixing layer' at the Ta/NiO (and NiO/Ta) interface due to a thermodynamically favorable reaction: 2Ta+5NiO=5Ni+ Ta2O5. This interface reaction has an effect on the exchange coupling as well. The thickness of the 'intermixing layer' as estimated by XPS depth-profiles was about 8-10nm. | G.H. Yu, M.H Li, F. W Zhu, X.F. Cui and J.L. Jin ( Department of Materials Physics, University of Science and Technology Beijing, Beijing 100083, China) ( State key laboratory for Advanced Metals and Materials, University of Science and Technology Beijing | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，6： | 47 |
| 2 | Analytical method for softness abrasive flow field based on discrete phase model显示文摘Aiming at the problem of difficult contact finishing for mini structural surface in course of mould manufacturing,a new no-tool precision machining method based on soft abrasive flow machining (SAFM) was proposed. It allocated restrained component near surface machined,constituted restrained abrasive flow passage,and made the surface become a segment of passage wall. It could control turbulence abrasive flow in restrained passage,realize micro cutting for passage wall,and utilize the irregular motion of abrasive flow to eliminate the mono-directional marks on machined surfaces,and the precision could reach the specular level. A two-phase dynamic model of abrasive flow oriented to SAFM combined with discrete phase model (DPM) was established,the law of two-phase flow motion and the related physical parameters was obtained by corresponding numerical simulation method,and the mechanism of precision machining in SAFM was discussed. Simulation results show that the abrasive flow machining process mainly appears as translation of ablating location with the influence by granular pressure,and as the variation of machining efficiency with the influence by near-wall particle velocity. Thus via control of the inlet velocity and its corresponding machining time,it is supposed to work out the machining process according to the machining requirements by using the Preston equation to seek the relationship among velocity,pressure and material removing rate. By tracking near-wall particles,it can be confirmed that the movement of near-wall abrasive particles is similar to stream-wise vortices. The cutting traces on workpiece surfaces assume disorderly arrangement,so the feasibility of the SAFM method can be reaffirmed. | JI ShiMing1,2, XIAO FengQing1,2 & TAN DaPeng1,2 1Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology, (Zhejiang University of Technology), Ministry of Education, Hangzhou 310014, China 2Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology of Zhejiang Province, Hangzhou 310014, China | 2010 | Science China(Technological Sciences)2010，53，10： | 28 |
| 3 | PHYSICAL MODELING FOR THE MECHANISMS OF BEAD FORMATION DEFECTS BASED ON THE STABILITY OF LIQUID METAL显示文摘Based on the theory of stability of the liquid metal under the action of surface tension,a physical mod- el is established for the mechanisms of the bead formation deferct’ humping’, which is generated during high - speed welding.A boundary function is introduced to correct the model,theoretical results got by the model correspond well with the experimental phenomena. A two - dimensional conducting model is adoopted in the simulation of the temperature field during high - speed welding.Finally, the factors acting upon the stability of liquid metal are analyzed. | S. Y. Yin L. Feng J. Z. Ding and S. J. Chan( 1) Beijing Polytechnic University, Beijing 100022, China 2) National Key Laboratory of Advanced Wdlding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 28 |
| 4 | COMPUTERIZED SIMULATION AND EXPERIMENTAL RESEARCH ON SOFT-SWITCHING ARC WELDING INVERTER POWER SOURCE显示文摘Based on the existing component models in the Pspice software package, a combined model for Insulat- ed the Bipolar Transistor (IGBT) is established, in which a non - linear is introduced to represent the parasitic capacitance. Using this model, computerized simulation is conducted for the FB - ZVZCS - PWM soft - ewitching converter,the switching and energy-transferring characteristics of the components are analyzed.The simulation results are testified by experiments.It is proved that by abopting appropriate models,computerized simulation becomes an effective tool for investigation of arc welding inverter power source. | S. J. Chen S. Y. Yin L. Feng and L. Y. Li( 1) School of Materials Science and Engineering, Beijing Polytechnic University, Beijing 100022, China 2)National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 24 |
| 5 | Experimental study on hydrodynamic effect of orientation micro-pored surfaces显示文摘The orientation of the dimple increases the flow distance in the dimple and produces fluid cumulative effect in the dimple length direction, which leads to obvious hydrodynamic effect as a result. In order to investigate the hydrodynamic effect of orientation dimples, a series of experiments was carried out on a ring-on-ring test. Multi-pored faces were tested with different dimple inclination angles and slender ratios. Film thickness and frictional torque were measured under different conditions of load and rotation speed. Experimental results showed that the orientation dimple could produce obvious dynamic effect by change of the flow direction and the increasing dimple orientation leads to increase of the load capability. The hydrodynamic effect strongly depends on dimple orientation parameters such as inclination angle and slender ratio. A larger load capability can be available by increasing dimple orientation and rotation speed. Experimental results agreed well with the theory that orientation micro-pores can significantly improve hydrodynamic performance of surfaces. | BAI ShaoXian1,2, PENG XuDong1,2, LI JiYun1,2 & MENG XiangKai1,2 1College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310032, China 2Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education, Zhejiang University of Technology, Hangzhou 310032, China | 2011 | Science China(Technological Sciences)2011，54，3： | 20 |
| 6 | Quantum secret sharing between multiparty and multiparty with Bell states and Bell measurements显示文摘We present a quantum secret sharing scheme between multiparty (m members in Group 1) and multiparty (n members in Group 2), and analyze its security. This scheme takes EPR pairs in Bell states as quantum resources. In order to obtain the shared key, all members only need to perform Bell measurements, rather than perform any local unitary operation. The total efficiency in this scheme approaches 100% as the classical information exchanged is not necessary except for the eavesdropping checks. | SHI RunHua 1,2* , HUANG LiuSheng 1,3 , YANG Wei 1,3 & ZHONG Hong 2 1 National High Performance Computing Center at Hefei, Department of Computer Science and Technology, University of Science and Technology of China, Hefei, 230027, China 2 School of Computer Science and Technology, Anhui University, Hefei 230039, China 3 Suzhou Institute for Advanced Study, USTC, Suzhou 215123, China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，12： | 17 |
| 7 | Al_(80)Ni_6Y_8Co_4Cu_2 GLASS ALLOYS CONTAINING NANOSCALEPARTICLES BY ISOTHERMAL ANNEALING OR QUENCHING显示文摘Al80Ni6 Y8 Co4 Cu2 amorphous ribbons were isothermally annealed and a mixed structure consisting of α-Al particle with a size of less than 15nm and Al3Ni compound with a size of about 30nm was obtained. The crystallization kinetics of Al80Ni6 Y8 Co4 Cu2 amorphous alloy shows that the precipitation of α-Al particles is the growth process controlled by diffusion of the solute elements rejected from the growing crystals. By quenching at different cooling rates, a mixed structure consisting of nanoscale α-Al particles and the remaining glass matrix or structure consisting of nanoscale particle (Al phase or Al3Ni compound) with a size of about 100nm was formed. The addition of Co elements and Cu elements to Al-Ni-Y alloy systems increases the glass formation ability of the alloy and the thermal stability of the supercooled liquid region against crystallization, which results from significant difference of atomic size, strong bonding nature among constituent elements and the low diffisivity of the solute elements due to the concentration gradient in the growing front of crystals. | Z. Bian, G. He and G.L. Chen (State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China) J. Lu, D.J. Chen, G.C. Tu, G.J. Chen and X.J. Hu (Shougang Metallurgical Research Institute, Beijing | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，5： | 16 |
| 8 | Quantum secret sharing between m-party and n-party with six states显示文摘A quantum secret sharing scheme between an m-party group and an n-party group is proposed using three conjugate bases.A sequence of single photons,each of which is prepared in one of the six states,is used directly to encode classical information in the quantum secret sharing process.In this scheme,each of all m members in group 1 chooses randomly his/her own secret key individually and independently,and directly encodes his/her respective secret information on the states of single photons via unitary operations,then the last one sends 1/n of the resulting qubits to each member of group 2.By measuring their respective qubits,all members in group 2 share the secret information shared by all members in group 1.It renders impossible a Trojan horse attack with a multi-photon signal,a fake-signal attack with EPR pairs,an attack with single photons,and an attack with invisible photons.We give the upper bounds on the average success probabilities for dishonest agent eavesdropping encryption using the fake-signal attack with any two-particle entangled states. | GAO Ting1,YAN FengLi2,3 & LI YouCheng2,3 1 College of Mathematics and Information Science,Hebei Normal University,Shijiazhuang 050016,China 2 College of Physics and Information Engineering,Hebei Normal University,Shijiazhuang 050016,China 3 Hebei Advanced Thin Films Laboratory,Shijiazhuang 050016,China | 2009 | Science China(Physics,Mechanics & Astronomy)2009，52，8： | 15 |
| 9 | Probabilistic teleportation via a non-maximally entangled GHZ state显示文摘We present a scheme for probabilistic teleportation via a non-maximally entangled GHZ state.Quantum teleportation will succeed with a calculable probability.The teleportation process requires the sender to make a generalized Bell state measurement,the cooperator to perform a generalized X basis measurement,and the receiver to perform a collective unitary transformation and to make a measurement on an auxiliary particle.The success probability of the teleportation is given.We also obtain the maximum of the success probability of the teleportation. | YAN FengLi1,2 & YAN Tao1,2 1 College of Physics Science and Information Engineering,Hebei Normal University,Shijiazhuang 050016,China 2 Hebei Advanced Thin Films Laboratory,Shijiazhuang 050016,China | 2010 | Chinese Science Bulletin2010，55，10： | 14 |
| 10 | Effects of Current Frequency on the Microstructure and Wear Resistance of Ceramic Coatings Embedded with SiC Nano-particles Produced by Micro-arc Oxidation on AZ91D Magnesium Alloy显示文摘To improve the surface wear resistance of the ceramic coating fabricated by micro-arc oxidation (MAO) on AZ91D magnesium alloy,ceramic coatings embedded with SiC nano-particles at different current frequency (500 Hz,700 Hz,and 900 Hz) were produced during the MAO process.The morphology and phase composition of the coatings were investigated by scanning electron microscopy (SEM),field emission scanning electron microscopy (FESEM),and X-ray diffraction (XRD).The surface roughness of the coatings was characterized by confocal laser scanning microscopy (CLSM).Simultaneously,the tribological properties of the composite coatings were evaluated by using a universal materials tester (UMT).The results shows that the wear resistance of the ceramic coatings with SiC nano-particles was improved significantly compared to the ceramic coatings without SiC nano-particles.Furthermore,the composite coating formed at current frequency 900 Hz showed the better wear resistance than the others. | Yue Yang and Hua Wu Key Laboratory of Advanced Structural Materials,Ministry of Education,Changchun University of Technology,Changchun 130012,China | 2010 | Journal of Materials Science & Technology2010，26，10： | 14 |
| 11 | New adaptive quasi-sliding mode control for nonlinear discrete-time systems显示文摘A new adaptive quasi-sliding mode control algorithm is developed for a class of nonlinear discrete-time systems, which is especially useful for nonlinear systems with vaguely known dynamics. This design is model-free, and is based directly on pseudo-partial-derivatives derived on-line from the input and output information of the system using an improved recursive projection type of identification algorithm. The theoretical analysis and simulation results show that the adaptive quasi-sliding mode control system is stable and convergent. | Wang Weihong1,2 & Hou Zhongsheng3 1. School of Tra?c and Transportation, Beijing Jiaotong Univ., Beijing 100044, P. R. China 2. Dept. of Automation, Taiyuan Univ. of Science & Technology, Taiyuan 030024, P. R. China 3. Advanced Control Systems Lab, School of Electronics and Information Engineering, Beijing Jiaotong Univ., Beijing 100044, P. R. China | 2008 | Journal of Systems Engineering and Electronics2008，19，1： | 11 |
| 12 | Stimulus-responsive polymeric nanoparticles for biomedical applications显示文摘Polymeric nanoparticles with unique properties are regarded as the most promising materials for biomedical applications including drug delivery and in vitro/in vivo imaging.Among them,stimulus-responsive polymeric nanoparticles,usually termed as 'intelligent' nanoparticles,could undergo structure,shape,and property changes after being exposed to external signals including pH,temperature,magnetic field,and light,which could be used to modulate the macroscopical behavior of the nanoparticles.This paper reviews the recent progress in stimulus-responsive nanoparticles used for drug delivery and in vitro/in vivo imaging,with an emphasis on double/multiple stimulus-responsive systems and their biomedical applications. | LI YongYong1,2,DONG HaiQing1,2,WANG Kang1,SHI DongLu 2,ZHANG XianZheng1 & ZHUO RenXi1 1Key Laboratory of Biomedical Polymers,Ministry of Education Department of Chemistry,Wuhan University,Wuhan 430072,China 2Institute for Advanced Materials and Nano Biomedicine(iNANO),Tongji University,Shanghai 200092,China | 2010 | Science China Chemistry2010，53，3： | 11 |
| 13 | IN SITU OBSERVATION OF GROWTH BEHAVIOR AND MORPHOLOGY OF DELTA-FERRITE AS FUNCTION OF SOLIDIFICATION RATE IN AN AISI304 STAINLESS STEEL显示文摘It was presented the in situ observation of growth behavior and morphology of delta-ferrite as a function of solidification rate in an AISI304 stainless steel. The specimens have been solidified and observed using confocal scanning laser microscopy (CSLM). The δ-phase always appears like cells on the sample surface when critical supercooling occurs, during which the L→δ transformation starts. The solid-liquid (S-L) interface is found to be finger shaped and has no faceted shape. γ phase appears among δ grains due to partitioning of Ni into the melt during solidification, when solidification rate is higher. The mergence of observed δ cells is possible for the steel sample cooled at 7.5℃/min. The formation of dendrites can be observed on the free surface of the steel sample cooled at 150℃/min. The size of solidified delta grains decreases from 120 to 20-80μm, and the volume fraction of solidified austenite increases with increase in solidification rate from 7.5 to 150℃/min. The relation between the tip radius of δ cell and its growth rate is deduced, and the results agree with the experimental values. | G.F. Liang1,2)*, C.Q. Wan1), J.C. Wu1), G.M. Zhu1), Y. Yu1), and Y. Fang1) 1) Advanced Technology Institute, Technology Center of Baosteel, Shanghai 201900, China 2) Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，6： | 11 |
| 14 | Grain Size and Wettability of TiO_2/SiO_2 Photocatalytic Composite Thin Filing显示文摘The uniform transparent TiO2/SiO2 photocatalytic composite thin films are prepared by sol-gel method on the soda lime glass substrates, and characterized by UV-visible spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), BET surface area, FTIR spectroscopy and X-ray photoelectron spectroscopy (XPS). It was found that the addition of SiO2 to TiO2 thin films can suppress the grain growth of TiO2 crystal, increase the hydroxyl content on the surface of TiO2 films, lower the contact angle for water on TiO2 films and enhance the hydrophilic property of TiO2 films. The super-hydrophilic TiO2/SiO2 photocatalytic composite thin films with the contact angle of 0° are obtained by the addition of 10%-20% SiO2 in mole fraction. | Jiaguo Yu, Xiujian Zhao, Jimmy C Yu, Jun Lin (State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China Deportment of Chemised The Chinese University of Hong Kong, Hong Kong, | 2001 | Rare Metals2001，20，2： | 11 |
| 15 | ION HEATING PROCESS DURING PLASMA IMMERSION ION IMPLANTATION显示文摘The research on plasma immersion ion implantation has been conducted for a little over ten years. Much is needed to investigate including processing technlogy, plasma sheath dynamics, interaction of plasma and surface, etc. Of the processing methods elavated temperature technique is usually used in PIII to produce a thick modified layer by means of the thermal diffusion. Meanwhile plasma ion heating is more recently developed by Ronghua Wei et al[1]. Therefore the temeperature is a critical parameter in plasma ion processing. In this paper we present the theoretical model and analysize the effect of imlantation voltage, plasma density, ion mass,etc on the temperature rise. | X.B. Tian, X.F. Wang, A.G. Liu, L.P. Wang, S. Y. Wang, B. Y. Tang and P. K. Chu 1)Advanced Welding Production & Technology National Key Laboratory, Harbin Institute of Technology, Harbin 150001, China 2)Department of Physics & Materials Science, City Uni | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，2： | 11 |
| 16 | Re-Os isotopic system and formation age of subcontinental lithosphere mantle显示文摘The determination of the formation age of subcontinental Lithosphere Mantle (SCLM) is a widely concerned issue in mantle geochemistry. it is difficult to obtain the formation age of SCLM using lithophile isotopic systems such as Rb-Sr, Sm-Nd, U-Th-Pb, ete., but as siderophile elements, the Re-Os isotopic system provides a powerful tool for that work. Here a comprehensive review on the recent development in Re-Os dating for SCLM has been given. | ZHI XiachenDepartment of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China Advance Research Center for Earth Science and Astronomy, USTC, Third World Academy of Science, Hefei 230026, China Laboratory of Chemical Geodynamics, USTC, Hefei 230026, China | 2000 | Chinese Science Bulletin2000，45，3： | 11 |
| 17 | Nonvolatile resistive switching memories-characteristics,mechanisms and challenges | Feng PAN,Chao CHEN,Zhi-shun WANG,Yu-chao YANG,Jing YANG,Fei ZENG Laboratory of Advanced Materials,Department of Materials Science and Engineering, Tsinghua University,Beijing 100084,China | 2010 | Progress in Natural Science:Materials International2010，20，1： | 10 |
| 18 | SYNTHESIS OF INTERMETALLICS BY MECHANICAL ALLOYING显示文摘SYNTHESISOFINTERMETALLICSBYMECHANICALALLOYINGF.H.(Sam)Froes;C.Suryanarayana;andD.Mukhopadhyay(InstituteforMaterialsandAdvance... | F. H.(Sam) Froes C. Suryanarayana and D. Mukhopadhyay (Institute for Materials and Advanced Processes (IMAP), University of Idaho,Moscow, ID 83844-3026, USA)C-G. Li(BlM, P.O. Box 81 , Beijing, 100095, P.R. CHINA)K. Brand(On leave from Institut fur Werkst | 1995 | Acta Metallurgica Sinica(English Letters)1995，8，Z1： | 10 |
| 19 | Eutectic Solidification in Near-eutectic Al-Si Casting Alloys显示文摘Eutectic solidification in near-eutectic Al-13 wt pct Si casting alloys and the effect of trace addition of boron or strontium on it have been investigated using thermal analysis and microstructural characterization.In unmodified alloy,dual eutectic structure has been observed.The coarse eutectic(dendrite-like Al+ coarse Si flakes) is formed above the equilibrium temperature of eutectic(Al+Si) reaction(577℃).The coarse eutectic(CE) grains nucleate from the primary silicon particles formed earlier due to local enrichment of silicon solute and grow in a divorced mode between the dendritic Al phase and large silicon flakes.The fine eutectic(FE) grains nucleate later on other potential sites activated by melt undercooling and grow in coupled-growing mode with the silicon crystals as fine flakes.The formation of the FE grains is favored in the alloys containing boron because of a great number of potential nucleation sites being added from boron-containing particles.Addition of strontium to the alloys restrains completely the formation of primary silicon particles and hence limits the nucleation of the CE.This is because the eutectic point has moved far enough to make the alloy,at this composition(Al-13 wt pct Si),hypo-eutectic.Local cooling rate during solidification has an important influence on competition formation of these two eutectics. | H.C.Liao,M.Zhang,J.J.Bi,K.Ding,X.Xi and S.Q.Wu School of Materials Science and Engineering,Southeast University Jiangsu Key Laboratory for Advanced Metallic Materials,Nanjing 211198,China | 2010 | Journal of Materials Science & Technology2010，26，12： | 10 |
| 20 | SIMULATION ON HEATING PROCESS IN ULTRASONIC WELDING OF PLASTICS显示文摘The energy conversion during ultrasonic plastic welding is analyzed on the basis of the theory of vis- coelastic mechanics,.The temperature field and the temperature change of the ABS specimen with ener- gy director during ultrasonic welding is simulated with finite element method(FEM). In the simu- lation process,the melting of the energy energy is also considered. The calculation results are in good agreement with the temperature measurement results, which proves that the simulation results are reli- able. | S. Q. Yang Z. Dong J. C. Yan and J. B. Ju( National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 10 |
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