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HCWCI/Carbon Steel Bimetal Liner by Liquid-Liquid Compound Lost Foam Casting

Journal of Iron and Steel Research International 2012年第10期19卷 13-19页

作者： XIAO Xiao-feng1,2, YE Sheng-ping2, YIN Wei-xin3. XUE Qiong4 (1. School of Mechanical Engineering and Automation, wuhan Textile University, wuhan 4.0073, hubei, Ch{3. 2. State Key Laboratory of material Processing and Die and Mould technology, Huazhong University of science and technology, wuhan 43.074, hubei, Ch{3. 3. wuhan zhike {13.-resistant material science and technology develop.ent Co ltd, wuhan 4.0073, hubei, Ch{3. 4. College of science, wuhan University of technology, wuhan 43.079, hubei, Ch{3.) [a] School of Mechanical Engineering and Automation Wuhan Textile University Wuhan 430073 Hubei China [b] State Key Laboratory of material Processing and Die and Mould technology Huazhong University of Science and Technology Wuhan 430074 Hubei China [c] wuhan zhike {2.-{3. material science and technology develop.ent Co ltd Wuhan 430073 Hubei China [d] College of science Wuhan University of Technology Wuhan 430079 Hubei China

Impact, friction and corrosion from the grinding balls and the grinding medium during the mineral processing result in liner breakage. Liner, made from Hadfield steel or alloyed steel, could not have served in wet grinding environment for more than ten months. Composite liner, made from HCWCI (high Cr white cast iron) and carbon steel, has been developed successfully with liquid-liquid composing process based on LFC (lost foam casting). The microstructure of composite was analyzed with optical microscope, SEM (scanning electron microscope)/EDX energy-dispersive X-ray and XRD (X-ray diffraction). According to micrograph, the comb{2.tion region of two metals was staggered like dogtooth, no mixtures occurred between two liquid metals, and its interface presented excellent metallurgical bonding state. The results of mechanical property test show that, the hardness of HRC, the fracture toughness, and the bending strength are more than 61, 16.5 J/cm2.and 1 600 MPa, respectively. Comparison between liners made from bimetal composite and alloyed steel has also been investigated in industrial hematite ball mill. The results of eight months test in wet grinding environment prove that the service life of bimetal composite liner is three times as long as that of one made from alloyed steel.

关键词： composite liner bimetal liquid-liquid compound composite interface lost foam casting high Cr white cast iron

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The characteristics of arc beam shaping in hybrid plasma and laser deposition manufacturing

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science China(Technological sciences) 2006年第2期49卷 238-247页

作者： ZHANG Hai’ou1, QIAN Yingping1,3. WANG Guilan1 & ZHENG Qiguang2.1. School of material {2. and technology, Huazhong University of {2. and technology, wuhan 43.074, China 2. Institute of Laser technology and Engineering, Huazhong University of {2. and technology, wuhan 43.074, China 3. Mechanical Engineering College, hubei University of technology, wuhan 43.068, China 1. School of material science and {2. Huazhong University of Science and Technology Wuhan 430074 China 3. Mechanical Engineering College Hubei University of Technology Wuhan 430068 China 2. Institute of Laser technology and Engineering Huazhong University of Science and Technology Wuhan 430074 China

As a new direct metal prototyping technology,the hybrid plasma and laser deposition manufacturing (PLDM) is proposed in this paper. In order to figure out the characteristics of plasma arc beam and mould in the PLDM process of high temperature alloy, the high speed CCD camera is used to obtain the picture around the plasma arc. Afterwards the sketch of picture is clearly obtained. And the effect of laser parameter, such as average power, pulse width, pulse repetition frequency and the angle between laser beam and plasma arc beam on the plasma arc appearance, is studied experimentally. The results show that the modality of plasma arc beam is markedly influenced by laser beam. And the improvements of shape precision and surface state of the layer deposited by PLDM are confirmed.

关键词： plasma hybrid laser, direct deposition, plasma arc beam, molding character, high-temperature alloy.

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Flame-retardant Mechanism of Magnesium Oxychloride in Epoxy Resin

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Journal of wuhan University of technology({2.s {3.) 2009年第1期24卷 127-131页

作者：秦麟卿 State Key Laboratory of Advanced technology for materials Synthesis and Processing Wuhan University of Technology Center for material Research and Analysis Wuhan University of Technology

Flame-retardant mechanism of magnesium oxychloride （M OC） in EP was in-vestigated by limiting oxygen index （LOI）, XRD, SEM, TG-DTG and DSC. The results show that MOC performed well as an inorganic flame-retardant in EP. When the content of MOC is 50%, the LOI of EP reaches 2..6% and mass of residual char reaches 9.6%. The flame retarde mechanism of MOC is due to the synergies of diluting, cooling, catalyzing char forming and obstructing effects.

关键词： magnesium oxychloride epoxy resin flame-retardant properties flame retardedmechanism

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Internal Curing Using Water-releasing material for High Strength Micro-expansive Concrete

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Journal of wuhan University of technology({2.s {3.) 2009年第3期24卷 510-513页

作者：吕林女 School of science Wuhan University of Technology

Due to its low water content, it is difficult for expansive agent to have an effective expansive effect on high strength concrete to compensate its extensive shrinkage and form a certain expansion. To solve this problem, water-releasing {2. with water storage and releasing characteristics was incorporated into high strength micro-expansive concrete to provide internal curing, and expansive effect of expansive agent was improved. Migration of water from initially saturated water-releasing {2. to the surrounding hydrating cement paste was investigated. Based on a given efficient diffusion distance of water stored in water-releasing {2., the mass and real water-cement ratio of cured cement paste were estimated. At the same time, the effect of internal curing of water-releasing {2. on the volume deformation of high strength micro-expansive concrete was investigated.

关键词： water-releasing material high strength concrete expansive internal curing

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A study of two-dimensional magnetic polaron

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science China(Physics,Mechanics & Astronomy) 2006年第4期49卷 421-429页

作者： LIU Tao1, ZHANG Huaihong1, FENG Mang1,2.& WANG Kelin1,3.1. School of science, Southwest University of science and technology, Mianyang 62.010, Ch{3. 2. wuhan Institute of Physics and Mathematics, Chinese Academy of sciences, wuhan 43.070, Ch{3. 3. Department of Modern Physics, University of science and technology of Ch{3., Hefei 2.0}02., Ch{3. School of science Southwest University of Science technology Mianyang 621010 China wuhan Institute of Physics Mathematics Chinese Academy of Sciences Wuhan 430070 China Department of Modern Physics University of Science technology of China Hefei 230026 China

By using the variational method and anneal simulation, we study in this paper the self-trapped magnetic polaron (STMP) in two-dimensional anti-ferromagnetic material and the bound magnetic polaron (BMP) in ferromagnetic material. Schwinger angular mom{2.um theory is applied to changing the problem into a coupling problem of carriers and two types of Bosons. Our calculation shows that there are single-peak and multi-peak structures in the two-dimensional STMP. For the ferromagnetic material, the properties of the two-dimensional BMP are almost the same as that in one-dimensional case; but for the anti-ferromagnetic material, the two-dimensional STMP structure is much richer than the one-dimensional case.

关键词： self-trapped magnetic polaron, bound magnetic polaron, impurity potential, anti-ferromagnet.

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Hydrothermal Synthesis,Crystal Structure and Properties of Inorganic-Organic Hybrid materials Based on Diphosphopentamolybdate

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Journal of wuhan University of technology({2.s {3.) 2008年第3期23卷 407-410页

作者：靳素荣 School of science Wuhan University of Technology

The compound of diphosphopentamolybdate { [Cu（en）（Hen）]2.P2.o5O2.1} }·3.2. [en=ethylenediamine] had been obtained from the hydrothermal method and characterized by single crystal X-ray diffraction, elemental analysis, FT-IR, and thermogravimetric analysis The structure consist of [P2.o5O2.1}^6- clusters anions, complex [Cu（en）（Hen）]^3. cations and crystallization water molecules, which are held together to a two-dimensional framework The most interesting feature of the compound is that two nitrogen atoms are both coordinated with Cu（ Ⅱ ） in one ethylenediamine molecule, for the other ethylenediamine molecule, only one nitrogen atom is towards Cu（ Ⅱ） and the other nitrogen atom is protonated and formed Hen^＋.

关键词： polyoxometalate hydrothermal synthesis crystal structure coordination groups

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Fractal Analysis of Gas Diffusion Layer in PEM Fuel Cells

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Journal of wuhan University of technology({2.s {3.) 2006年第1期21卷 22-25页

作者：石英肖金生 State Key Laboratory of Advanced technology for materials Synthesis and Processing Wuhan University of Technology Wuhan 430070ChinaSchool of Automation Wuhan University of Technology Wuhan 430070 China State Key Laboratory of Advanced technology for materials Synthesis and Processing Wuhan University of Technology Wuhan 430070ChinaSchool of Automotive EngineeringWuhan University of Technology Wuhan 430070China

The aim of this study is to show how fractal analysis can be effectively used to characterize the texture of porous solids. The materials under study were carbon papers, the backing material of the gas diffusion layer （GDL） in Proton Exchange Membrane Fuel Cell （PEMFC）. The fractal dimensions were calculated by analyzing data from mercury porosimetry. The polytotrafluoroethylene （PTFE） treated carbon paper shows a significantly high fractal dimension value than pare sample, and the high fractal dimension signifies that the physical complexity of the pore surface is enhanced. The fractal dimension can be used as a valid parameter to monitor the textural evolution of the samples as the treatm{2. progresses, as this behaves in a similar way to other textural parameters. The use of fractal analysis in conjunction with the results of classical characterization methods leads to a better understanding of textural modificatious in the processing of materials.

关键词： PEMFC gas diffusion layer fractal dimension mewury porosimetry

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Tele-Network Design Based on Queue Competition Algorithm

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wuhan University Journal of Natural sciences 2003年第S1期8卷 327-330页

作者： Huang Zhang-can, Wan Li-jun, Tang Tao, Chen Zheng-xuState Key Laboratory of Software Engineering, wuhan University, wuhan 4{2.072. hubei, Ch{{2.School of material science and Engineering, wuhan University of technology , wuhan 4{2.070, hubei, Ch{{2.School of Automation, wuhan University of technology, wuhan 4{2.070, hubei, Ch{{2.School of science, wuhan University of technology, wuhan 4{2.070, hubei, Ch{{2. wuhan University State Key Laboratory of Software Engineering Wuhan Hubei China (GRID:grid.49470.3e) (ISNI:***) wuhan University of technology School of Material Science and Engineering Wuhan Hubei China (GRID:grid.162110.5) (ISNI:***) wuhan University of technology School of Automation Wuhan Hubei China (GRID:grid.162110.5) (ISNI:***) wuhan University of technology School of Science Wuhan Hubei China (GRID:grid.162110.5) (ISNI:***)

In this paper, we report research on how to design the tele-network. First of all, we defined the reliability of tele-network. According to the definition, we divide the whole reliability into two parts:the reliability of the mini-way and that of the whole system. Then we do algebra unintersection of the mini-way, deriving a function of reliability of tele-network. Also, we got a function of the cost of tele-network after analyzing the cost of arcs and points. Finally, we give a mathematical model to design a tele-network. For the algorithm, we define the distance of a network and adjacent area within certain boundaries . We present a new algorithm--Queue Competition Algorithm (QCA) based on the adjacent area . The QCA correlates sequence of fitnesses in their father-generations with hunting zone of mutation and the number of individuals generated by mutation, making the stronger fitness in a small zone converge at a local extreme value, but the weaker one takes the advantage of lots of individuals and a big zone to hunt a new local extreme value. In this way, we get the overall extreme value. Numerical simulation shows that we can get the efficient hunting and exact solution by using QCA. The QCA efficient hunting and exact solution.

关键词： reliability Queue Competition algorithm the distance of a network adjacent area

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Phenomenon of “contact guidance” on the surface with nano-micro-groove-like pattern and cell physiological effects

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Chinese science Bulletin 2009年第18期54卷 3200-3205页

作者： ZHOU Feng 1,2. YUAN Lin 1,3. HUANG He 1,2.& CHEN Hong1,2.1 State Key Laboratory of Advanced technology for {2.s Synthesis and Processing, wuhan 43.070, Ch{3. 2.School of {2.s science and Engineering, wuhan University of technology, wuhan 43.070, Ch{3. 3.Biomedical {2.s Research Center, wuhan University of technology, wuhan 43.070, Ch{3. State Key Laboratory of Advanced technology for materials Synthesis and Processing Wuhan 430070 China School of materials science and Engineering Wuhan University of Technology Wuhan 430070 China Biomedical materials Research Center Wuhan University of Technology Wuhan 430070 China

The topography of material surface has important influence on cell behavior and physiological functions. Groove-like pattern has drawn much attention among various patterns, due to the phenomenon of "contact guidance" induced by this kind of topography. This review mainly focuses on "contact guidance" formation as well as its influence on cell behavior and physiological effects. The possible mechanisms of "contact guidance" formation were discussed. The research trend and the potential applications were also suggested.

关键词：细胞行为生理功能材料表面逻辑效应触指纳米微米生理效应

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β-Sialon Produced by Carbon Thermal Nitriding Reaction of Bauxite

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International Journal of Minerals,Metallurgy and materials 2000年第3期14卷 209-213页

作者： Jun Wang, Nan Li, Caicheng Shi, Chengchang Jia ( material science and Engineering School, University of science and {3. Beijing, Beijing 100083. China material science and Engineering School, wuhan University of science and {3., wuhan 43. material science and Engineering School University of Science and Technology Beijing Beijing 100083 China material science and Engineering School Wuhan University of Science and Technology Wuhan 430081 China

β-Sialon was produced by carbon thermal nitriding reaction in N_2.gas atmosphere when the mixtures of bauxite and anthracite were put into vertical furnace. According to the mass loss of raw materials and the result of X-ray diffration (XRD) of products, the influences of the process parameters on the compositions and relative contents of products, such as the fixed carbon content, the flow of N2. the soaking time and the temperature, were researched.

关键词： β-Sialon bauxite anthracite carbon thermal nitriding processing parameter vertical furnace

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