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Study on Relationship between the Groove Structure and Efficiency of Electromagnetic Pump Used in Aluminum Alloy Casting Jibo Hou a，Yun Liu b，Yougen Peng c，Renjie Huang d School of Materials Science and Enginnering; North University of China; Shanxi Taiyuan 030051; China ahoujibo@nuc.edu.cn bliuyun@nuc.edu.cn cpengyougen@nuc.edu.cn dhuangrenjie124@163.com Key word:Electromagnetic Pump; Groove Structure; Efficiency; Aluminum Alloy Casting Abstract.The relationship between the groove structure of the direct current plane electromagnetic pump and efficiency has been investigated in this paper.
In order to facilitate research, the first we use the medium of mercury as a pump in a transparent plexiglass material on the test .when we get regular on simulation equipment.
Pump body interinging liquid tube and rising liquid tube are transparent material, which are easy to experiment observing the height of liquid. the current can import from metal electrode to the liquid metal, the electric field perpendicular to the direction of the opening solenoid installed in the groove on both sides.
BeiJing：Special casting and Nonferrous alloy . 2006，vol.26(6), 344-336,In Chinese [4] Zhi-jue Quan，Jing Yang，You-gen PengSimulation .Taiyuan: North University of China journal. 2002, vol.23(2) , 735-737,In Chinese [5] Chinese institute of mechanics、Shanghai electric scientific research team of electromagnetic pump.
Beijing:Science press.1979, 1-5,11～13,30～40,In Chinese

Acknowledgements This work was supported by the National Natural Science Foundation of China (Project No. 50505032), and Tianjin Science & Technology Commission (Project No. 10ZCKFGX03200).
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Multi-material Model The multi-material model of a sandwich beam is defined for a heterogeneous rectangular cross section subject to pure bending, formed by two different materials S (for the skins) and C (for the core), see Fig.1a, both characterized by isotropic mechanical response and bilinear elasto-plastic behavior, see Fig.1b.
According to these hypothesis the distribution of the two materials, the stress distribution in the cross section, considering elastic and plastic deformations, is given by: σS=ESεSy≤σSyfor h2>y>H2; σC=ECεCy≤σSyfor -h2materials S and C.
The varying parameters are: skin thickness (t); skin materials (Young Modulus ES, yield stress σCy); core material (EC, σCy); core density (ρ).
Banhart, Manufacture, characterisation and application of cellular metals and metal foams, Progress in Materials Science 46 (2001) 559–632 [2] B.H.
Arwade, Steel foam for structures: A review of applications, manufacturing and material properties, Journal of Constructional Steel Research, 71 (2012), 1-10 [3] L.J.

The moisture content wW takes into account the overall water in solid, liquid and vapour states contained in the pores of the materials.
Four fictitious materials are created changing the properties that influence the thermal and hygroscopic transient behaviour.
Given that the Glaser method model is steady state it produces the same moisture contents for materials with different heat capacities.
The Glaser method results are conservative during the year except for March and April, in which the moisture content is underestimated at most by 17% for the hygroscopic materials and at most by 5% for the non-hygroscopic materials.
Hagentoft, "Determination of liquid water transfer properties of porous building materials and development of numerical assessment methods: Introduction to the ec hamstad project" Journal of Thermal Envelope and Building Science, vol. 27, no. 4, pp. 253-260, 2004

Preparation of Silicon Carbide Reticulated Porous Ceramics by Organic Foam Impregnation Xiangzhao Zhang1, Renjuan Wang2, Guiwu Liu1, a, Haicheng Shao1, Kuo Zhang2, Zhongqi Shi2 and Guanjun Qiao1, 2 1School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China 2State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China agwliu76@mail.ujs.edu.cn Keywords: Silicon carbide (SiC), Reticulated porous ceramics, Organic foam impregnation, Apparent density.
As the application domains for these materials vary widely, the ultimate properties of the posed by the specific use are also diverse.
Firstly deionized water was mixed with other materials (polyacrylamide, sintering aids and silica sol) except for CMC by stirring for about 12 h.
Materials Science Forum, 745 (2013) 646-651
Journal of the European Ceramic Society, 30 (2010) 2671-2676

The microstructure and properties were studied in the paper, which can provide theoretical basis and guidance for new materials and technology of the outside oxygen head tip of gasification furnace.
Experimental Experimental materials.
The wear resistance of Co-based alloy laser cladding nano-Y2O3 composites is obviously better than Co-based surfacing materials, Wearing values are decreased by 25.6 mg of the surfacing layer to 0.5 mg of the laser cladding layer in the wear testing of 40 minutes.
a） b） c） d） Fig.3 SEM back scattered electron image and planar element distribution of laser cladding coating a) Microstructure b) Planar distribution of Cr c) Planar distribution of Co d) Planar distribution of Ni Conclusions (1) Superficial treatment was conducted on the Co-based alloy surfacing laser of Ni-based alloy materials with Nano-Y2O3 rare earth materials and laser cladding technology.
Xu: China Journal of Laser Vol. 31(2004), p. 1143, (In Chinese)

In materials with high values of spontaneous magnetization of Is~500÷1500 Gs, the magnetostatic interaction at с~0,1÷0,3 can have a significant effect on the magnetization of particles with the coercive force of Hc~100÷300 Oe.
Academy of Sciences of the USSR.
Residual magnetization of ultrafine magnetic materials. - Vladivostok, Far Eastern National University Publishing House, 2004, p. 192; [4] Shcherbakov, V.P.
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Ilyushin I.G// Journal of Nanomaterials, vol. 2013, Article ID 687613, 15 pages, 2013. doi:10.1155/2013/687613.

Experimental Materials and methods.
References [1] Yuanhui Liu, Lisong Hu, Xunmin Yu, Qingxin Li and Jiashou Sun: Journal of Yangtze University(Natural Science Edition) Sci & Eng V.
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Under the transmitted light irradiation, the defective particles in the material are imaged to the pixel array surface of CCD device.
“XLPE insulation compound purity evaluation based on contam inant particlemapping technology”, Chinese Journal of Scientific Instrumen, Vol 29, May. 2008, pp. 1035-1039
Bradley, “Automated Surface Roughness Measurement”, The International Journal of Advanced Manufacturing Technology, Vol. 9, No. 16, pp. 668-674, Dec. 2000
The Second International Conference on Information and Computing Science, No. 2, 2009, pp.373-375
The Second International Conference on Information and Computing Science, No. 2, 2009, pp.207-210

As the production line process capability is imbalance, the material can not put in place in time, production layout and method of operation irrational, the spirit of the production line workers is undisciplined, the productivity is low.
Another production line material placed unreasonable, the operating personnel to operate non-standard, the fixture design also bring about the problem of inconvenient pipeline efficiency is not high.
Acknowledgement It is a project supported by “Twelfth five-year” national science and technology support project (2011BAC10B06).
Chai, Analysis on balancing and improvement of notebook case assembling lines, Journal of Taiyuan University of Science and Technology. 31(2010) 252-254
Hou, Balance analysis and improvement of an LCD shell production line, Industrial Engineering Journal. 14(2011) 124-129.