Search results

Acknowledgements This work is supported by National Natural Science Foundation of China National Natural Science Foundation Council(51075405), Hunan Education Department Research Project(10C0418), Changsha Science and Technology Plan(K110707-11)and Changsha University Scientific Research Projects(CDJJ-09010207), Hunan University Students Research Learning and Innovative Experiment Project(2010-376).
References [1] Liu Yu: Powder Metallurgy Materials Science and Engineering, 2010, 15 (5):427-432 [2] Zhang Jianguang, Li Yimin, Liu Yu: Powder Metallurgy Materials Science and Engineering, 2009, 14 (2): 89-95 [3] T.
Aizawa, Kihara: Advances in powder metallurgy and particular materials, 1996, 5(2): 19-20 [4] Wang Anlin: Shanghai Jiao Tong University, 2005, 39 (5) :790-794 [5] Wei Qun:The numerical methods and the procedures of the basic principles of discrete element method.
Beijing: Science Press, 1991:5-24 [6] C.
Tamagnini: Journal of Engineering Mathematics, 2005, 52: 265-291 [7] Itasca Consulting Group, Inc. 2005.

As specific molecular sieves, cathode materials of secondary battery, catalysts in organic reaction, it has a broad application prospects in environmental and materials science [3].
Journal of the Chemical Society, Chemical Communications, 1992, 17: 1213-1214
Soil Science, 2002, 39 (5): 699-706
Microporous and mesoporous materials, 2004, 67(1): 43-52
Science, 1986, 231(4739): 717-719

Udomsamuthirun4,5,c 1Department of Food science and Technology, Faculty of Home Economics Technology, Rajamangala University of Technology Phra Nakhon,Bangkok 10300, Thailand. 2Department of science and Mathematics, Faculty of Science and Technology, Pathumwan Institute of Technology, Bangkok 10330, Thailand. 3Department of Physics, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus,Nakhon Pathom 73140,Thailand. 4Prasarnmit Physics Research Unit, Department of Physics, Faculty of Science, Srinakharinwirot University,Bangkok 10110, Thailand. 5Thailand Center of Excellence in Physics (ThEP), Si Ayutthaya Road, Bangkok 10400, Thailand.
Summary The Y123 and Y13-20-33 superconductor were synthesized by melt process which Y2O3 99.99%, BaCO3 99.9% and CuO 99+% were the beginning materials.
Acknowledgements The author would like to thank the financial support of the Office of the Higher Education Commission, Faculty of Science Srinakharinwirot University, ThEP Center, Pathumwan Institute of Technology and Faculty of Home Economics Technology Rajamangala University of Technology phra nakhon.
Physica C; 469: 2012-2014 [4] Udomsamuthirun P, Kruaehong T, Nilkamjon T, Ratreng S, The New Superconductors of YBaCuO Materials, Journal of Superconductivity and Novel Magnetism; 23 (2010): 1377-1380
Advanced Materials Research ; 979: 220-223.

A study of High-pressure Descaling Nozzle Jet Flow characteristics by CFD simulation Qian CHENG1,Yongli CHEN 1,2,a,Jiao HE1,Chong SHEN1, Hui YAN1, Mingquan WU1 and Liqing CHEN2 1School of Metallurgical and Materials,Chongqing University of Science and Technology,Chongqing 401331,China 2State Key Laboratory of Rolling Technology and Automation,Northeastern University,Shenyang,Liaoning 110004,China achenyongli923@qq.com Keywords:High-pressure descaling,CFD numerical simulation,Oxide skin,Defects.
Experimental materials and methods The simulation of high-pressure water jet flow field of nozzle is the study of two-phase distribution of gas-liquid in the standard atmospheric pressure,Therefore, Selected calculation model is pressure-velocity coupling model.Figure 1(a) is Gas-liquid two-dimensional model of external flow.model specific parameters are as follows:Entrance speed:200m/ s;Entrance pressure:20MPa;Exit pressure:0.101 MPa (1atm),the unit of exit pressure: Kg/s;Select the triangle mesh,equidistant division.
Gambit Model is imported to Fluent.the solve solution conditions are set as follows:Select the solver choice Unsteady flow solution;VOF model calculation model selected;Choose iterative equation standard k-ε equation;Define the material phase:the first phase is air, the second phase is water;Turbulent kinetic energy (Kinetic Energy) value is 0.01m2/s2, dissipation rate ise 0.007m2/s3;Without considering the influence of the gravity of the water jet velocity,exit velocity calculated value is 200m/s;PISO control solution is selected In the Pressure-Velocity Coupling mode;Time Step Size is 0.01s; Number of Time Steps is 2000;in each iteration cycle, Max Iterations Per Time Step is 100.Iteration convergence curve is shown in Figure 1(b).The figure shows that the iterations to about 1500, the equation has been convergence.
References [1] Li Zheng.Improvement of Water jet and abrasive water jet nozzle.New Jersey Instit- ute of Technology.Vol.12(1994),p.32-35 [2] Schadow K C, Gutmark E,Parr D M,Wilson K J.Selective Control of Flow Coherence in TriangularJets.Experiments in Fluids.Vol.6(1988),p.129-135 [3] B.Rembold.N.A.Adams, L.Kleise.Direct numerical simulation of a transitional recta-nguar jet.International Journal of Heat and Fluid Flow.Vol.8(2002),p. 547-553 [4] H.Liu,J.Wang,N.Kelson,R.j.Brown.A study of abrasive water jet characteristics by CFD simulation.Journal of Material Processing Technology.Vol.6(2004),p.488-493 [5] Michael J.Woodward,Ph.D.An experimental coMParison of commercially available ateady-straight-rattem water jeting nozzle.Vol.6(1990),p.56-59

Introduction Understanding dendrite solidification is of great importance because the scale of a dendrite determines segregation patterns, microstructures, and consequently determines the properties of the material[1].
DT=KT/Cp is thermal diffusivity of material , t is time.
References [1] Oguchi K, Suzuki T. : Journal of Wuhan University of Technology(Materials Science Edition) ,(2009), No. 1 p. 119
Wang and Y.Y.Li:Chinese Journal of Materials Research, Vol. 23 (2009) No. 3 p 317 [5] R.

Experimental 1.1 Experimental materials and pharmaceutical Sodium silicate; hydrochloride; ferric chloride (AR); pH meter (PHS-3D-type), electric mixer (JJ-1 type) 1.2 Preparation of poly ferric chloride 1.2.1 Preparation of poly-silicic acid Quantitative configuration silicate crystals weighed solution under stirring at room temperature was slowly added hydrochloric acid (37%) to maintain a pH of 3 or less.
Journal of Hazardous Materials, 2007, 143(1-2): 567–574
Journal of Hazardous Materials, 2007, 152(1): 221-227
Trends in Food Science & Technology, 1984, 38(1): 85-97.

A Method for Predicting the Chemical Composition of Recycled Aluminum Alloys Musbah Mahfoud1,a, Prasad Ayyagari2 1Department of Materials Science and Engineering, Tripoli University, Tripoli, Libya 2Brunel Centre for Advanced Solidification Technology, Brunel University, U.K.
Ribeiro,”Recycling of aluminum swarf by direct incorporation in aluminum melts”, Journal of Materials Processing Technology, 209(11) (2009) 5195-5203
Pantke,”Hot profile extrusion of AA-6060 aluminum chips”, Journal of Materials Processing Technology, 209(7) (2009) 3343-3350

Dry Shrinkage and Compressive Strength of Blended Cement Pastes with Fly Ash and Silica Fume Yan Li 1, a, Daosheng Sun1, Xiusheng Wu1, Aiguo Wang 1, Wei Xu 1 and Min Deng 2 1Anhui Key Laboratory of Advanced Building Materials, Anhui University of Architecture, Hefei 230022, China 2College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China alyc@aiai.edu.cn Keywords: Compressive Strength , Drying Shrinkage, Cement Pastes, Fly Ash, Silica Fume.
Fly ash (FA) and silica fume (SF) were used as cement replacement materials at levels of 0%, 5%, 10%, and 15% , 40%, 35%, 25%, and 15% by weight of the total cementitious material, respectively.
These materials are industrial by-products such as fly ash, slags, silica fume (or microsilica), and some naturally active materials such as volcanic tuffs.
Experimental Iinvestigation Raw Materials.
Nehdi: Environmental Science and Policy Vol. 8(2), (2005), p. 105 [5] L.

Materials and methods Study Site Study site was located at 44°04′~46°40′ N, 125°42′~130°10′ E in HC, China.
Soil Environmental Science.
Chinese Journal of Applied Ecology, Vol.15(2004), P687-690
Chinese Journal of Applied Ecology, Vol.14(2002), P515-519
Journal of Soil and Water Conservation, Vol.17(2003), P64-66

For higher strain-hardening materials, it might be possible to reduce conservatism by adjusting the factor of 2.
Acknowledgement The work of this paper was supported by the National Natural Science Foundation of China (No. 51075199).
Budden: International Journal of Pressure Vessels and Piping (2012).
Zhao: Journal of Aeronautical Materials, Vol.34 (2014) No.4, p.51.
Dai et al: Rare Metal Materials and Engineering, Vol.42 (2013) No.7, p.1469.