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A Review of the Ion Beam Assisted Deposition Researches towards Industrialization for the Second Generation High Temperature Superconducting Wire Fabrication

A Review of the Ion Beam Assisted Deposition Researches towa...

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中国材料大会2012

作者： Feng Feng Timing Qu Kai Shi Rongxia Huang Wei Wu Yanyi Zhang Shaozhu Xiao Junjun Wei Xiaohao Wang Zhenghe Han Division of Advanced Manufacturing Graduate School at Shenzhen Tsinghua University Applied Superconductivity Research Center Department of Physics Tsinghua University Key Laboratory for Advanced Materials Processing Technology Ministry of Education Department of Mechanical Engineering Tsinghua University

ISBN: (纸本)9783037856079;3037856076

Ion beam assisted deposition (IBAD) is an important technique to fabricate the second generation high temperature superconducting (2G HTS) wires. Among the fabrication routes of 2G HTS long wires, IBAD route achieved the best performance in recent years. IBAD was adopted in this field in 1991 to obtain biaxially textured buffer layers, which helped to deposit high quality YBCO superconducting films on metallic substrates for the first time. Series of experimental and industrial researches on IBAD were carried out by many groups worldwide. And in the researches lasting for over two decades, the focused material for IBAD was changed from Yttria-Stabilized Zirconia (YSZ), Gd2Zr2O7(GZO) to MgO. In this paper, the research progresses and the main achievements were briefly reviewed.

关键词： High temperature superconductor (HTS), Coated conductor, Buffer layer, Ion beam assisted deposition (IBAD)

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Multilayer thin film growth on crystalline and quasicrystalline surfaces: A phase-field crystal study

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Physical Review B 2012年第24期85卷 245428-245428页

作者： Srevatsan Muralidharan Raika Khodadad Ethan Sullivan Mikko Haataja Department of Mechanical and Aerospace Engineering Princeton Institute for the Science and Technology of Materials (PRISM) Program in Applied and Computational Mathematics (PACM) Princeton University Princeton New Jersey 08544 USA and School of Mathematics Institute for Advanced Study Princeton New Jersey 08540 USA

In this paper, we explore the effects of misfit strain fields on both heterogeneous nucleation behavior and anisotropic growth of islands at submonolayer coverages and compositional patterning at complete monolayer coverage via simulations of a phase-field crystal model. In particular, deposition on top of a herringbone structure and quasicrystalline (QC) substrate are considered, the former representing a system with spatially periodic misfit strain fields arising from the presence of surface dislocations, and the latter representing a system which inherently possesses a wide range of local, aperiodic misfit patterns. In the case of single-component systems, we demonstrate that misfit strain fields lead to heterogeneous nucleation behavior and anisotropic island growth. In the case of QC substrate, a wide range of morphologies, such as coexistence of locally hexagonally ordered atomic clusters within a larger scale arrangement with overall QC symmetry and so-called “starfish” aggregates, is observed in a pure system at submonolayer coverages when the adlayer-substrate interaction strength and lattice mismatch are tuned. In the case of bulk-immiscible binary systems at complete monolayer coverage, strain-stabilized compositional domains emerge at low line tension values for both substrates. Interestingly, the compositional domains on the QC substrate inherit their symmetries at sufficiently low line tension values, while at larger line tension values, the domain structure begins to resemble the classical spinodal microstructure. Such domain structures should be readily observable in colloidal systems in which attractive interparticle and particle-substrate interactions can be tuned.

关键词： THIN films CRYSTALS NUCLEATION DISLOCATIONS in crystals MICROSTRUCTURE

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Fabrication and Characterization of Organic Thin Films for Applications in Tissue engineering: Emphasis on Cell-Surface Interactions

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MRS Online Proceedings Library 2012年第1期1469卷 43-48页

作者： Wertheimer, Michael R. St-Georges-Robillard, Amélie Lerouge, Sophie Mwale, Fackson Elkin, Bentsian Oehr, Christian Wirges, Werner Gerhard, Reimund Department of Engineering Physics École Polytechnique Montréal Canada Department of Mechanical Engineering École de Technologie Supérieure (ÉTS) Montréal Canada Centre de recherche du CHUM (CRCHUM) Canada Division of Orthopaedic Surgery McGill University Canada Lady Davis Institute for Medical Research Montreal Canada Fraunhofer Institute for Interfacial Engineering and Biotechnology Stuttgart Germany Applied Condensed Matter Physics University of Potsdam Potsdam-Golm Germany

In several recent communications from these laboratories, we have described observations that thin organic layers which are rich in primary amine (R-NH2) groups are very efficient surfaces for the adhesion of mammalian cells, even for controlling the differentiation of stem cells. We prepare such deposits by plasma polymerization at low pressure (thin films designated “L-PPE:N”, for “Low-pressure Plasma Polymerized Ethylene containing Nitrogen”), at atmospheric (“High”) pressure (“H-PPE:N”), or by vacuum-ultraviolet photo-polymerization (“UV-PE:N”). More recently, we have also investigated a commercially available material, Parylene diX AM. In the present communication we shall, first, briefly introduce literature relating to electrostatic interactions between cells, proteins, and charged surfaces. Next, we discuss the comparative results of physico-chemical characterizations of the various organic deposits mentioned above, which deliberately contain varying concentrations of nitrogen, [N], and amine groups, [NH2]. Finally, we present certain selected cell-response results that pertain to applications in orthopedic medicine; we discuss the influence of surface properties on the observed behaviors of various cell lines, with particular emphasis on possible electrostatic attractive forces due to positively charged % MathType!MTEF!2!1!+- % feaagKart1ev2aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn % hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr % 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq-Jc9 % vqaqpepm0xbba9pwe9Q8fs0-yqaqpepae9pg0FirpepeKkFr0xfr-x % fr-xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaGaaeOuaiaab2 % cacaqGobGaaeisamaaDaaaleaacaqGZaaabaGaae4kaaaaaaa!3AA8! $${\text{R - NH}}_{\text{3}}^{\text{ +} }$$ groups and negatively charged proteins and cells, respectively.

关键词： adhesion biomaterial electrical properties

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Maxwell’s Demon in the Ranque-Hilsch Vortex Tube

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Physical Review Letters 2012年第5期109卷 054503-054503页

作者： R. Liew J. C. H. Zeegers J. G. M. Kuerten W. R. Michalek Department of Applied Physics Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven Netherlands Department of Mechanical Engineering Eindhoven University of Technology P.O. Box 513 5600 MB Eindhoven Netherlands Faculty EEMCS University of Twente P.O. Box 217 7500 AE Enschede Netherlands

A theory was developed that explains energy separation in a vortex tube, known as one of the Maxwellian demons. It appears that there is a unique relation between the pressures in the exits of the vortex tube and its ... 详细信息

关键词： FORCE & energy RESEARCH VORTEX tubes PRESSURE TEMPERATURE measurements TEMPERATURE control

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Radiological characteristics of charged particle interactions in the first clay-nanoparticle dichromate gel dosimeter

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Journal of physics: Conference Series 2013年第1期444卷

作者： M L Taylor T Maeyama N Fukunishi K L Ishikawa K Fukasaku T Furuta S Takagi S Noda R Himeno S Fukuda RMIT University/School of Applied Sciences Melbourne Australia Peter MacCallum Cancer Centre/Physical Sciences Melbourne Australia RIKEN/Nishina Centre for Accelerator-Based Science Wako Japan RIKEN/Computational Science Research Program Wako Japan The University of Tokyo/Department of Nuclear Engineering and Management Graduate School of Engineering Tokyo Japan The University of Tokyo/Photon Science Centre Graduate School of Engineering Tokyo Japan Himon'ya Hospital Department of Neurosurgery Tokyo Japan RIKEN/Advanced Centre for Computing and Communication Wako Japan The University of Tokyo/Department of Mechanical Engineering Graduate School of Engineering Tokyo Japan National Institute of Radiological Sciences / Research Centre for Charged Particle Therapy Chiba Japan

The incorporation of clay nanoparticles into gel dosimeters shows promise for significant diffusion reduction – but to what extent does the presence of the nano-clay influence charged particle interactions and, in particular, what is the impact on water equivalence? In this work, we quantify the radiological characteristics of electron, proton and carbon ion interactions in the RIKEN dichromate nanoclay gel and specifically evaluate the water equivalence over a broad energy range. Results indicate that the radiological properties are sufficiently representative of tissues that this low-diffusion gel could readily be used for validation of complex dose distributions. Electron and proton ranges are within 1 % of those in water. Mean effective atomic numbers for electron interactions in the range 10 keV – 10 GeV are within 1 % of those of water which, coupled with the similar mass density, ultimately means the overall impact on dose distributions is not great. The range of C6+ ions in the nanoclay gel is closer to that of water (< 4 %) than a common polymer gel dosimeter (< 7 %), though experimentally measured R1 values indicate an over-response at low doses.

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Erratum to: “Morphology based particle segregation by electrostatic charge” [J. Aerosol Sci. 39 (2008) 785–792]

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Journal of Aerosol Science 2013年 58卷 172-172页

作者： Rajan K. Chakrabarty Hans Moosmüller Mark A. Garro W. Patrick Arnott Jay G. Slowik Eben S. Cross Jeong-Ho Han Paul Davidovits Timothy B. Onasch Douglas R. Worsnop Chemical Physics Program University of Nevada Reno NV 89557 USA Desert Research Institute Nevada System of Higher Education Reno NV 89512 USA Division of Engineering and Applied Sciences Harvard University Cambridge MA 02138 USA Department of Physics University of Nevada Reno NV 89517 USA Department of Chemistry University of Toronto Ontario Canada M5S 3H6 Department of Chemistry Boston College Chestnut Hill MA 02467 USA Aerodyne Research Inc. Billerica MA 01821 USA

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Study of the impact of granulometry in the drying of rolled products of cereal flour

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Research Journal of applied Sciences, engineering and Technology 2012年第14期4卷 2247-2250页

作者： Diene, A. Diagne, I. Tamba, S. Niang, F. Sarr, M. Wereme, A. Sissoko, G. Mechanical Engineering Department Ecole Polytechnique of Thies Senegal Laboratory of Semiconductors and Solar Energy Physics Department Faculty of Science and Technology University Cheikh Anta Diop Dakar Senegal Civil Engineering Department Ecole Polytechnique of Thies Senegal IUT/UT Senegal UFR/SET University Thies Thies Senegal Energy Department Research Institute of Applied Sciences and Technologies CNRST Ouagadougou Burkina Faso

Such as millet, corn and transformed into "couscous", "arraw" or "thiakri" that fit for human consumption. They are widely used in Senegal where about 70% of the population feed on these products because of their nutritional value and also their availability. Today, only in the small industrial zone of Thies, one can count four producers, who produce each: few tons. But the major problems they face are the drying and packaging of these products after their transformation process. This article is based on the drying of rolled products. It reveals that the granulometry is an extremely important factor in the drying process. The testing on the rolled products showed that the small ball does not dry out faster than larger, as is often thought. This assertion is not always true. This study allowed us to show the different scenarios that may arise as well as their limits. In addition, we determined that the equation of the drying curve of rolled products is generally in the form polynomial of level 4. © Maxwell Scientific Organization, 2012.

关键词： Drying

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Deciphering the atomic structure of a complex Sr/Ge (100) phase via scanning tunneling microscopy and first-principles calculations

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Physical Review B 2012年第19期85卷 195316-195316页

作者： Boris Lukanov Kevin Garrity Sohrab Ismail-Beigi Eric I. Altman Department of Mechanical Engineering and Materials Science Yale University New Haven CT 06520 USA Center for Research on Interface Structures and Phenomena (CRISP) Yale University New Haven CT 06520 USA Department of Applied Physics Yale University New Haven CT 06520 USA Department of Chemical and Environmental Engineering Yale University New Haven CT 06520 USA

The details of a Sr-induced (3×4) reconstruction on Ge(100) were examined using scanning tunneling microscopy (STM) and density functional theory. At 1/6 ML of Sr, this reconstruction is similar to the 1/6 ML (3×2) Sr phase previously observed on Si. In contrast to Si, however, atomic-resolution images of the Sr-Ge phase exhibit more dramatic and unusual bias dependence in STM that could be explained with the help of first-principles calculations of minimum energy structures. Simulated STM images are in excellent agreement with the experimental data and allow the (3×2) Sr-Si double dimer vacancy alloy model to be extended to the Ge surface through a more complex (3×4) arrangement of its building blocks. The difference between Si and Ge is interpreted in terms of the lower Ge-Ge binding energy and differences in the interatomic bond lengths.

关键词： ATOMIC structure PHASE rule & equilibrium SCANNING tunneling microscopy DENSITY functionals ATOMIC theory SIMULATION methods & models BINDING energy

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Nonlinear Geometric Effects in mechanical Bistable Morphing Structures

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Physical Review Letters 2012年第11期109卷 114302-114302页

作者： Zi Chen Qiaohang Guo Carmel Majidi Wenzhe Chen David J. Srolovitz Mikko P. Haataja Department of Mechanical and Aerospace Engineering Princeton University Princeton New Jersey 08544 USA Princeton Institute for the Science and Technology of Materials (PRISM) Princeton University Princeton New Jersey 08544 USA Department of Biomedical Engineering Washington University St. Louis Missouri 63130 USA College of Materials Science and Engineering Fuzhou University Fuzhou Fujian 350108 China Department of Mathematics and Physics Fujian University of Technology Fuzhou Fujian 350108 China Department of Mechanical Engineering Carnegie Mellon University Pittsburgh Pennsylvania 15213 USA Department of Materials Science and Engineering Fujian University of Technology Fuzhou Fujian 350108 China Institute for High Performance Computing 1 Fusionopolis Way Singapore 138632 Program in Applied and Computational Mathematics Princeton University Princeton New Jersey 08544 USA School of Mathematics Institute for Advanced Study Princeton New Jersey 08540 USA

Bistable structures associated with nonlinear deformation behavior, exemplified by the Venus flytrap and slap bracelet, can switch between different functional shapes upon actuation. Despite numerous efforts in modeling such large deformation behavior of shells, the roles of mechanical and nonlinear geometric effects on bistability remain elusive. We demonstrate, through both theoretical analysis and tabletop experiments, that two dimensionless parameters control bistability. Our work classifies the conditions for bistability, and extends the large deformation theory of plates and shells.

关键词： NONLINEAR theories DEFORMATIONS (Mechanics) PARAMETER estimation OPTICAL bistability STRUCTURAL shells PLATES (engineering) CRYSTAL structure

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Optimal Filling of Shapes

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Physical Review Letters 2012年第19期108卷 198304-198304页

作者： Carolyn L. Phillips Joshua A. Anderson Greg Huber Sharon C. Glotzer Applied Physics Program University of Michigan Ann Arbor Michigan 48109 USA Department of Chemical Engineering University of Michigan Ann Arbor Michigan 48109 USA Center for Cell Analysis and Modeling University of Connecticut Health Center Farmington Connecticut 06032 USA Department of Cell Biology University of Connecticut Health Center Farmington Connecticut 06032 USA Department of Mathematics University of Connecticut Storrs Connecticut 06032 USA Department of Materials Science and Engineering University of Michigan Ann Arbor Michigan 48109 USA

We present filling as a type of spatial subdivision problem similar to covering and packing. Filling addresses the optimal placement of overlapping objects lying entirely inside an arbitrary shape so as to cover the most interior volume. In n-dimensional space, if the objects are polydisperse n-balls, we show that solutions correspond to sets of maximal n-balls. For polygons, we provide a heuristic for finding solutions of maximal disks. We consider the properties of ideal distributions of N disks as N→∞. We note an analogy with energy landscapes.

关键词： SHAPES FORCE & energy COMBINATORIAL packing & covering ANALOGY HEURISTIC THEORY of distributions (Functional analysis)

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