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ISSN 1005-0302
CN 21-1315/TG
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      28 March 2002, Volume 18 Issue 02 Previous Issue    Next Issue
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    Research Articles
    Refinement of Fourier Coefficients from the Stokes Deconvoluted Profile
    Gang LIU, Ke LU, Zhide LIANGZhide
    J. Mater. Sci. Technol., 2002, 18 (02): 97-98. 
    Abstract   HTML   PDF (280KB)
    Computer-aided experimental technique was used to study the Stokes deconvolution of X-ray diffraction profile. Considerable difference can be found between the Fourier coefficients obtained from the deconvolutions of singlet and doublet experimental profiles. Nevertheless, the resultant physical profiles corresponding to singlet and doublet profiles are identical. An approach is proposed to refine the Fourier coefficients, and the refined Fourier coefficients coincide well with that obtained from the deconvolution of singlet experimental profile.
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    Magnetic Properties of Ni Nanoparticles and Ni(C) Nanocapsules
    Z.J.Li, G.H.Wen, F.W.Wang, J.L.Yu, X.L.Dong, X.X.Zhang, Z.D.Zhang
    J. Mater. Sci. Technol., 2002, 18 (02): 99-100. 
    Abstract   HTML   PDF (349KB)
    Structure and magnetic properties of Ni nanoparticles and Ni(C) nanocapsules were studied. The carbon atoms hardly affect the lattice of Ni to form Ni-C solid solution or nickel carbides. The large thermal irreversibility in zero-field-cooled and zero-field magnetization curves indicates magnetic blocking with a wide energy barrier. Saturation magnetization, remanent magnetization and coercivity of Ni(C) nanocapsules decrease with increasing temperature.
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    Properties of TiO2 Thin Films Prepared by Magnetron Sputtering
    Wenjie ZHANG, Ying LI, Fuhui WANG
    J. Mater. Sci. Technol., 2002, 18 (02): 101-107. 
    Abstract   HTML   PDF (1719KB)
    With rapid progressive application of TiO2 thin films, magnetron sputtering becomes a very interesting method to prepare such multi-functional thin films. This paper focuses on influences of various deposition processes and deposition rate on the structures and properties of TiO2 thin films. Anatase, rutile or amorphous TiO2 films with various crystalline structures and different photocatalytic, optical and electrical properties can be produced by varying sputtering gases, substrate temperature, annealing process, deposition rate and the characteristics of magnetron sputtering. This may in turn affect the functions of TiO2 films in many applications. Furthermore, TiO2-based composites films can overcome many limitations and improve the properties of TiO2 films.
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    Grain Boundary Triple Junction Effects on the Fatigue Deformation and Cracking Behaviors of Copper Tricrystal and Tetracrystals
    Weiping JIA, Zhiyong ZHU, Zhongguang WANG, Shouxin LI
    J. Mater. Sci. Technol., 2002, 18 (02): 108-112. 
    Abstract   HTML   PDF (1915KB)
    Cyclic symmetrical tension-compression fatigue tests in an axial plastic strain range of 2.0´10-4 to 1.5´10-3 were performed on three copper tetracrystal specimens containing two grain boundary triple lines as well as one copper tricrystal specimen employing a multiple step method. Experimental results show that the strengthening effect of triple junction (TJ) on axial saturation stress increased with increasing plastic strain amplitude. The strengthening effects owe much to the strain incompatibilities at TJ. The cyclic stress-strain (CSS) curves of tetracrystals are higher than that of tricrystal. At low strain amplitude, deformation at TJ is smaller than that near grain boundary (GB), which results in that the width of TJ effect zone is smaller than that near GB. Whether GB split or not is associated with the angle between GB and loading axis, activation of slip systems beside GB and the accommodation and annihilation of residual dislocations on GB planes.
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    Plasticity and Interfacial Dislocation Mechanisms in Epitaxial and Polycrystalline Al Films Constrained by Substrates
    G.Dehm, T.Wagner, T.J.Balk, E.Arzt, B.J.Inkson
    J. Mater. Sci. Technol., 2002, 18 (02): 113-117. 
    Abstract   HTML   PDF (1338KB)
    Stresses in epitaxial and textured Al films were determined by substrate-curvature measurements. It was found that in both cases the flow stresses increase with decreasing film thickness. The flow stresses in the epitaxial Al films are in agreement with a dislocation-based model, while the same model strongly underestimates the flow stresses of textured Al films. In situ transmission electron microscopy studies indicate that dislocations channeling through epitaxial Al films on single-crystalline (0001) a-Al2O3 substrates frequently deposit dislocation segments adjacent to the interface. Furthermore, the Al/a-Al2O3 interface acted as a dislocation source. In this case, the interface is between two crystalline lattices. In contrast, the interface of textured Al films on oxidized silicon substrates is between the crystalline Al and the amorphous SiOC interlayer. It is speculated that the different nature of the interfaces changes dislocation mechanisms and thus influences the flow stresses.
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    Interfacial Electronic Structure of Thin Cu Films Grown on Ar+-ion Sputter-cleaned a-Al2O3 Substrates
    Christina Scheu, Min Gao, Manfred Rühle
    J. Mater. Sci. Technol., 2002, 18 (02): 117-120. 
    Abstract   HTML   PDF (721KB)
    The bonding and electronic structure of Cu/(0001)Al2O3 and Cu/(1120)Al2O3 interfaces has been studied experimentally using spatially-resolved transmission electron energy loss spectroscopy. The specimen were prepared by depositing Cu on single-crystal a-Al2O3 substrates, which have been Ar+-ion sputter-cleaned prior to the growth of Cu. For both orientations of the a-Al2O3 substrate, atomically abrupt interfaces formed as determined by high-resolution transmission electron microscopy. The investigations of the interfacial Cu-L2,3, Al-L2,3 and O-K energy loss near-edge structures, which are proportional to the site- and angular-momentum-projected unoccupied density of states above the Fermi level, indicate the existence of metallic Cu-Al bonds at the Cu/Al2O3 interface independent of the substrate orientation.
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    Stress in Thin Fil ms; Diffraction Elastic Constants and Grain Interaction
    U.Welzel, M.Leoni, P.Lamparter, E.J.Mittemeijer
    J. Mater. Sci. Technol., 2002, 18 (02): 121-124. 
    Abstract   HTML   PDF (966KB)
    Untextured bulk polycrystals usually possess macroscopically isotropic elastic properties whereas for most thin films transverse isotropy is expected, owing to the limited dimensionality. The usually applied models for the calculation of elastic constants of polycrystals from single crystal elastic constants (so-called grain interaction models) erroneously predict macroscopic isotropy for an (untextured) thin film. This paper presents a summary of recent work where it has been demonstrated for the first time by X-ray diffraction analysis of stresses in thin films that elastic grain interaction can lead to macroscopically elastically anisotropic behaviour (shown by non-linear sin2y plots). A new grain interaction model, predicting the macroscopically anisotropic behaviour of thin films, is proposed.
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    Synthesis and Hydrogen Storage in Single-walled Carbon Nanotubes
    Chang LIU, Huiming CHENG
    J. Mater. Sci. Technol., 2002, 18 (02): 124-126. 
    Abstract   HTML   PDF (1254KB)
    Single-walled carbon nanotubes (SWNTs) were synthesized by a hydrogen arc discharge method. A high yield of gram quantity of SWNTs per hour was achieved. Tow kinds of SWNT products: web-like substance and thin films in large slices were obtained. Results of resonant Raman scattering measurements indicate that the SWNTs prepared have a wider diameter distribution and a larger mean diameter. Hydrogen uptake measurements of the two kinds of SWNT samples (both as prepared and pretreated) were carried out using a high pressure volumetric method, respectively. And a hydrogen storage capacity of 4 wt pct could be repeatedly achieved for the suitably pretreated SWNTs, which indicates that SWNTs may be a promising hydrogen storage material.
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    An Axisymmetric Numerical Model for Simulating Kinetically-Limited Growth of a Cylindrical Rod in 3D Laser-induced Chemical Vapor Deposition
    R.Nassar, W.Z.Dai, Q.Chen
    J. Mater. Sci. Technol., 2002, 18 (02): 127-132. 
    Abstract   HTML   PDF (1165KB)
    Laser-induced chemical vapor deposition (LCVD) is an important process for freeform microfabrication of high aspect ratio prototypes. The system consists of a laser beam focused onto a movable substrate in a vacuum chamber. Heat from the laser at or near the focal spot of the beam causes gas in the chamber to react. As a result, solid-phase reaction products are deposited on the substrate to form the microstructure. In this paper, we develop a numerical model for simulating growth of an axisymmetric cylindrical rod by pre-specifying the surface temperatures required for growing the rod and then by solving for the laser power that satisfies the pre-specified temperatures. The solution using least squares is obtained by minimizing the sum of square deviations between the pre-specified surface temperatures and the calculated temperatures from the heat equation with a given laser power as a heat source. Model predictions of the laser power over growth time helped in optimizing the growth process. Rods grown based on the predicted laser power from the numerical model were very close to being cylindrical in shape. Ways to further improve the model are being investigated.
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    Internal Friction and Elastic Study on Surface Nanocrystallized 304 Stainless Steel Induced by High-energy Shot Peening
    Ping WU, Jingyang WANG, Hongwang ZHANG, Xiaowei WANG
    J. Mater. Sci. Technol., 2002, 18 (02): 132-134. 
    Abstract   HTML   PDF (622KB)
    The 304 stainless steel with nanostructured surface layer was successfully obtained by using the high-energy shot peening (HESP) method. The internal friction and Young's modulus of this kind of surface nanocrystallized material were dynamically measured by means of the vibrating reed apparatus. The results implied that different treatment time could induce different microstructure and distribution characteristic of defects in this kind of materials. It is also demonstrated that there is a transition layer between the nano-layer on surface and the coarse grain region inside. The transition layer obviously has certain influence on the overall mechanical properties.
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    Lattice Distortion Analysis Directly from High Resolution Transmission Electron Microscopy Images—the LADIA Program Package
    K.Du, Y.Rau, N.Y.Jin-Phillipp, F.Phillipp
    J. Mater. Sci. Technol., 2002, 18 (02): 135-138. 
    Abstract   HTML   PDF (954KB)
    Direct strain mapping from high resolution transmission electron microscopy images is possible for coherent structures. At proper imaging conditions the intensity peaks in the image have a constant spatial relationship with the projected atom columns. This allows the determination of the geometry of the projected unit cell without comparison with image simulations. The fast procedure is particularly suited for the analysis of large areas. The software package LADIA is written in the PV-WAVE code and provides all necessary tools for image processing and annalysis. Image intensity peak are determined by a cross-correlation technique, which avoids problems from noise in the low spatial frequency range. The lower limit of strain that can be detected at a sampling rate of 44 pixels/nm is »2%.
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    Thermal Expansion Behavior of Precursor-Derived Amorphous Si-C-N and Si-B-C-N Ceramics
    Jianqiang Peng, Hans Jürgen Seifert, Fritz Aldinger
    J. Mater. Sci. Technol., 2002, 18 (02): 139-142. 
    Abstract   HTML   PDF (948KB)
    Thermal expansion behaviors of some precursor-derived amorphous Si-C-N and Si-B-C-N ceramics, which were shaped by plastic forming after crosslink, were studied. To complete the shrinkage and densification, after thermolysis specimens were heat treated at a temperature of 1400°C for 10h in nitrogen atmosphere. The thermal expansion coefficient of VT50-derived amorphous Si-C-N ceramic increases from 1.98´10-6/K at 400°C to 3.09´10-6/K at 1000°C, of NCP200-derived amorphous Si-C-N ceramic increases from 2.35´10-6/K at 400°C to 3.45´10-6/K at 1000°C, and of T2-1-derived amorphous Si-B-C-N ceramic increases from 2.08´10-6/K at 400°C to 3.18´10-6/K at 1000°C. No glass transition for these amorphous ceramic materials was detected, indicating that as-thermolyzedd precursor-derived Si-(B-)C-N ceramic materials are amorphous solids, but not glasses.
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    Tribological Behavior of Ti3SiC2-based Material
    Zhimei SUN, Yanchun ZHOU, Shu LI
    J. Mater. Sci. Technol., 2002, 18 (02): 142-145. 
    Abstract   HTML   PDF (1330KB)
    The wear and friction properties of Ti3SiC2-based materials were studied using the pin-on-disc method. The friction coefficient of Ti3SiC2-based material was not very sensitive to normal load, the steady state value, m, increased from 0.4 to 0.5 when the normal load increased from 7.7 N to 14.7 N. The wear volume for Ti3SiC2 disc increased with increasing normal load or sliding distance in the tests. The average wear rate of Ti3SiC2-based material was 9.9×10 mm3/Nm. The debris on the Ti3SiC2 disc was essentially made up of Ti3SiC2 and steel pin materials, while the debris on the steel sliders was generally pin material. The wear mechanism was concluded as the fracture and delamination of Ti3SiC2-based materials followed by adhesive wear of steel sliders.
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    First-principle Calculation of the Properties of Ti3SiC2
    Duanwen SHI, Yanchun ZHOU
    J. Mater. Sci. Technol., 2002, 18 (02): 146-148. 
    Abstract   HTML   PDF (541KB)
    The electronic and structural properties for Ti3SiC2 were studied using the first-principle calculation method. By using the calculated band structure and density of states, the high electrical conductivity of Ti3SiC2 are explained. The bonding character of Ti3SiC2 is analyzed in the map of charge density distribution.
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    Mold Filling Behavior of Melts with Different Viscosity under Centrifugal Force Field
    Daming XU, Qingmei YU, Xin LI, Geying AN
    J. Mater. Sci. Technol., 2002, 18 (02): 149-151. 
    Abstract   HTML   PDF (651KB)
    Recently proposed mathematical model for mold filling processes under centrifugal force field conditions and the computer codes were first tested through the sample simulation of gravity mold filling process for a benchmark plate-casting, which were compared with quoted experimental observations. The model and the developed computer program were then applied to the numerical simulation of centrifugal field mold filling processes for a thin-section casting with a titanium alloy melt of assumed viscosity of 1.2 and 12.0 mm2/s, respectively. The computation result comparison shows that the flow behaviors of the filling melts are basically similar to each other although the less viscous melt tends to fill into the thin section casting cavity faster.
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    Experimental Study of Inducing Compressive Stress by Anti-welding Heating Treatment in a Thin Plate Weldment with Variant Temperatures
    Huaining CHEN, W.Fricke, A.Krohn
    J. Mater. Sci. Technol., 2002, 18 (02): 151-154. 
    Abstract   HTML   PDF (678KB)
    Significant compressive stress may be induced in thin plate weldment by anti-welding heating treatment (AWHT) with a temperature difference above 350°C, and an interesting phenomenon of obvious residual stress reduction on non-treated surface was discovered. The method of AWHT has no great effect on the mechanical properties including hardness, strength and toughness of the metal material. The results in the paper prompt a possibility application in shipbuilding industry.
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    Reconstruction of Complex Materials by Integral Geometric Measures
    Klaus R.Mecke
    J. Mater. Sci. Technol., 2002, 18 (02): 155-158. 
    Abstract   HTML   PDF (892KB)
    The goal of much research in computational materials science is to quantify necessary morphological information and then to develop stochastic models which both accurately reflect the material morphology and allow one to estimate macroscopic physical properties. A novel method of characterizing the morphology of disordered systems is presented based on the evolution of a family of integral geometric measures during erosion and dilation operations. The method is used to determine the accuracy of model reconstructions of random systems. It is shown that the use of erosion/dilation operations on the original image leads to a more accurate discrimination of morphology than previous methods.
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    Antiphase Boundary Strengthening in a Single Crystal Nickel-base Superalloy
    Jinghua ZHANG, Tao JIN, Yongbo XU, Zhuangqi HU, Xin WU
    J. Mater. Sci. Technol., 2002, 18 (02): 159-162. 
    Abstract   HTML   PDF (1047KB)
    An investigation has been made into strengthening mechanism in a single crystal nickel-base superalloy DD8 by transmission electron microscopy. The results show that the stress rupture strength of the alloy increases with decreasing misfit, and the antiphase boundaries (APBs) formed in the ordered g' phase, rather than the misfits, play a dominate role in strengthening of the single crystal Ni-base superalloy DD8. There are three kinds of mechanisms for forming the APBs which were observed in the present materials. One is mis-arrangement of the local ordered atoms in the g'precipitates due to the local strain; the second arises from the 1/2<110> dislocations cutting into the g', and the third is the formation of the APBs induced by the 1/2<110> matrix dislocation network. The contribution of the antiphase boundary energy to the strength of the alloy can be expressed by: where t is the resistance to deformation provided by the APB energy; S is the long-range order degree in g'; TC is the transition temperature from order to disorder; f is the volume fraction of g'; rs is the radius of g'; b is the vector; a is the lattice constant; G is the shear modulus, and k is the proportional constant.
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    Modeling Recrystallization of Austenite for C-Mn Steels during Hot Deformation by Cellular Automaton
    Lin ZHANG, Caibei ZHANG, Xianghua LIU, Guodong WANG, yuanming WANG
    J. Mater. Sci. Technol., 2002, 18 (02): 163-166. 
    Abstract   HTML   PDF (1175KB)
    By using a cellular automaton method, microstructure evolution of recrystallization in austenite during hot deformation was simulated for C-Mn steels. A model takes into account the influence of deformation temperature, strain, and strain rate on the dynamic recrystallization fraction, and the effect of the keeping time on the static recrystallization fraction based on a hot deformation test on a Gleeble-1500 simulator. In addition, the size changing of g grains during continuous hot deformation was simulated by applying the model.
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    Enthalpy of Mixing of Liquid Al-Cr and Cr-Ni Alloys
    P.Saltykov, V.T.Witusiewicz, I.Arpshofen, H.J.Seifert, F.Aldinger
    J. Mater. Sci. Technol., 2002, 18 (02): 167-170. 
    Abstract   HTML   PDF (723KB)
    The partial and the integral enthalpies of mixing of liquid Al-Cr and Ni-Cr binary alloys have been determined by high temperature isoperibolic calorimetry at 1723± 5 K and 1729±5 K, respectively. The results were analytically described by the thermodynamically adapted power series (TAPS). The enthalpies of mixing values for both binary liquid melts are small and negative and in good agreement with the available literature data. Minima of the mixing enthalpies of liquid Al-Cr and Ni-Cr alloys are -7.0 kJ.mol-1 at 46 at. pct Cr and -3.0 kJ. mol-1 at 37 at. pct Cr, respectively.
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    Entrapment of Inclusions in Diamond Crystals Grown from Fe-Ni-C System
    Yuxian LIU, Limei XIAO, Longwei YIN
    J. Mater. Sci. Technol., 2002, 18 (02): 171-172. 
    Abstract   HTML   PDF (595KB)
    Diamond single crystals grown from Fe-Ni-C system at high temperature-high pressure (HPHT) usually contain inclusions related to the metallic catalyst. During the diamond growth, the metallic inclusions are trapped by the growth front or are formed through reaction between the contaminants trapped in the diamond. In the present paper, the metallic inclusions related to the catalyst were systematically examined by transmission electron microscopy (TEM). The chemical composition and crystal structure of the metallic inclusions were for the first time determined by selected area electron diffraction pattern (SADP) combined with energy dispersive X-ray spectrometry (EDS). It is shown that the inclusions are mainly composed of orthorhombic FeSi2, fcc (FeNi)23C6, and orthorhombic Fe3C, hexagonal Ni3C.
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    Microstructure of Si Cones Prepared by Ar+ -Sputtering Si/Mo Target
    X.L.Ma, N.G.Shang, C.S.Lee, S.T.Lee
    J. Mater. Sci. Technol., 2002, 18 (02): 173-175. 
    Abstract   HTML   PDF (1050KB)
    By Ar+ sputtering onto Si wafers which were surrounded by Mo plates, uniform cones over a large area on the Si surface were formed. Scanning electron microscopic study showed that the cones were formed on the entire surface of the Si wafer. The dimensions of the uniform cones were one micrometer in diameter and 5~6 micrometers high. They were further characterized by means of cross-sectional transmission electron microscopy, with the technique of micro-diffractions. It was found that the cone contained a pure Si regime and a Mo-rich regime. In the binary Mo-Si zone, we identified three distinct areas vertically: (1) domains of Mo-induced Si ordered structures, (2) a small volume of a new Mo3Si2 structural variant, intergrown with the Si ordered structure, and (3) a small amount of pure Mo nanoparticles covering the surface of the cones. The formation of the large and uniform cones may provide a new surface configuration for potential applications in surface science and technology.
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    Thermal-Mechanical Fatigue Behavior and Life Analysis of Cast Ni-base Superalloy K417
    Hui ZHANG, Yuechen WANG, Feng LIU, Suhua AI, Qishan ZANG, Zhongguang WANG
    J. Mater. Sci. Technol., 2002, 18 (02): 176-180. 
    Abstract   HTML   PDF (1440KB)
    In-phase (IP) and out-of-phase (OP) thermal-mechanical fatigue (TMF) behavior of cast Ni-base superalloy K417 was studied. All experiments were carried out under total strain control with temperature cycling between 400~850℃. Both in-phase and out-of-phase TMF specimens exhibited cyclic hardening followed by cyclic softening at the minimum temperature. Besides, they cyclically hardened in the early stage of life followed by cyclic softening at the maximum temperature. OP TMF life was longer than that of IP TMF. Various damage mechanisms operating in different controlled strain ranges and phasing were discussed. A few life prediction methods for isothermal fatigue were used to handle TMF fatigue and their applicability to superalloy K417 was evaluated. The SEM analysis of the fracture surface showed that transgranular fracture was the principal cracking mode for both IP and OP TMF. Oxidation was the main damage mechanism in causing shorter fatigue life for IP TMF compared with OP TMF.
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    Tensile Properties and Microstructure of DS NiAl-28Cr-5.8Mo-0.2Hf Alloy
    Chuanyong CUI, Jianting GUO, Yihui QI, Hengqiang YE
    J. Mater. Sci. Technol., 2002, 18 (02): 181-184. 
    Abstract   HTML   PDF (1508KB)
    A multiphase alloy NiAl-28Cr-5.8Mo-0.2Hf was directionally solidified in Ar atmosphere in an Al2O3-SiO2 mold by standard Bridgman method. The fracture toughness and tensile properties at 980ºC as well as tensile creep at 1050℃ were studied. It was found that the strength of the present alloy is higher than that of many NiAl-based alloy and the stress exponent n for creep is about 6.69. Then the possible strengthening mechanism and creep mechanism are also discussed.
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    Pressure Effect on Crystallization of Zr55Cu30Al10Ni5 Bulk Metallic Glass
    Jianjun LIU, Keqiang QIU, Aimin WANG, Haifeng ZHANG, Bingzhe DING, Zhuangqi HU
    J. Mater. Sci. Technol., 2002, 18 (02): 184-186. 
    Abstract   HTML   PDF (680KB)
    The effect of pressure on the variation of the crystallization phases of the Zr55Cu30Al10Ni5 bulk glass and its thermal stability under high pressure annealing was investigated by X-ray diffraction (XRD) and differential scanning calorimeter (DSC). The mode of crystallization and products of crystallization of the Zr55Cu30Al10Ni5 bulk glass were quite different under different pressure. At ambient pressure, the crystallization products consisted of NiZr2 and CuZr2, while at pressure of 1 GPa and 3 GPa, the alloys crystallized into NiZr2 and Cu10Zr7, respectively. The alloy was nearly not crystallized and only a small amount of Cu10Zr7 was precipitated under 5 GPa. DSC proved that the mode of the crystallization under high pressure was different from that at ambient pressure.
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    Technique of Aluminum Alloy Composite by Inversion Casting
    Na LI, Shouren GUO, Dezhong LU, Zhuangqi HU, Jinglin WEN
    J. Mater. Sci. Technol., 2002, 18 (02): 187-188. 
    Abstract   HTML   PDF (639KB)
    The influence of the temperature of liquid aluminum alloy, the dipping time in liquid alloy and the thickness of base strips on the solidified layer was studied during the process of producing aluminum alloy composite strips used in automobile radiator with inversion casting. It is concluded that there is welding as well as diffusion of alloying elements between the base strip and the coating. Experiments proved that the interface has a good bonding.
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    Spatially Resolved Analytical Electron Microscopy at Grain Boundaries of a-Al2O3
    S.Nufer, A.G.Marinopoulos, C.Elsä, sser, W.Kurtz, M.R&#, hle
    J. Mater. Sci. Technol., 2002, 18 (02): 189-190. 
    Abstract   HTML   PDF (433KB)
    In this work the electronic structure and the impurity excess of the basal and rhombohedral twin grain boundaries are investigated, using electron energy loss spectroscopy (EELS) and energy dispersive X-ray spectroscopy (EDXS). The measurability of electronic structures of the twin grain boundaries are discussed by comparing theoretical density of states (DOS) from bulk material with interfacial DOS, obtained from local density functional theory (LDFT) calculations.
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    Synchronizing the Parameter Non-matching Chaotic Systems
    Shouliang BU, Shaoqing WANG, Hengqiang YE
    J. Mater. Sci. Technol., 2002, 18 (02): 191-192. 
    Abstract   HTML   PDF (352KB)
    It is shown that synchronization, in a weak sense, can be achieved between two-parameter non-matching systems by using the adaptive control method. In essence, this requires just a scalar signal transmitted from the drive to the response system. Two typical chaotic systems, i.e., Lorenz and Rőssler system, are taken as examples of applications in this paper.
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