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Online since: November 2012
Authors: Hanizam Awang, Md Azree Othuman Mydin, Ahmad Farhan Roslan
Materials and Mixture Proportions i) Portland Cement SEM1 and Fine Aggregates.
Cement and Material Research. 35 (2005). 913 – 917
Preliminary views on the potential of foamed concrete as a structural material.
[6] Sanjuán, M.A and Moragues, A, Polypropylene-fibre-reinforced mortar mixes: optimization to control plastic shrinkage, Composites Science and Technology 57, Issue 6, (1997), Pages 655-660 [7] Ramamurthy, K., Kunhanandan Nambiar, E.K. and Indu Siva Ranjani, G.
[8] Parikh, K., Fibres in concrete, The Indian Concrete Journal. (2003) [9] Noordin, M.N., Development of a lightweight concrete wall panel system.
Online since: October 2010
Authors: Xiao Hai Li, Xin Rong Wang, Yu Fang, Bao Lin Yin
Research on Surface Modification Technique by EDM Xiaohai Li1,a,Yu Fang2,b,Xinrong Wang1,c, Baolin Yin1,d 1Dept of of Mechanical Engineering, Jiamusi University, Jiamusi City, China 2 Shanghai University of Engineering Science , Shanghai City, China alixh519@126.com , bfanyu @126.com, cwangxinrong65@sin.com, dyinblin@163.com Keywords: Electric Discharge Machining, Die, Surface modification Abstract.
As the discharge time is very short, overheating liquid electrode material will produce explosion due to the disappeared channel pressure suddenly, and moreover, the liquid gasification, pyrolysis gasification of working medium within the semi-sintered tool electrode will make the explosion of overheating liquid electrode material strengthen.
Eventually, the overheating material of tool electrode will be separated from electrode surface at high speed, crashed into the surface of workpieces.
Part of tool electrode material will be merged into the molten materials of workpieces at the discharge point to form crystal nucleation.
References [1] Binshi Xu, Shining Ma: China Mechanical Engineering Vol.5 (1996), p.3 (in Chinese) [2] Shinya Hayakawa, Ricardo Itiro Ori, Fumihiro Itoigawa: International Journal of Electrical Machining Vol.6 (2001) , p.111 [3] A.
Online since: March 2017
Authors: Maxim Puchnin, Barbora Bryksí Stunová, Vlastimil Bryksí
., Hedvikov 1, 538 43 Tremosnice, Czech Republic, EU 3CTU in Prague, Faculty of Mechanical Engineering, Dept. of Materials Engineering, Karlovo nam. 13, 121 35 Prague, Czech Republic, EU a,*barbora.stunova@fs.cvut.cz, bv.bryksi@kovolis-hedvikov.cz, cmaxim.puchnin@fs.cvut.cz Keywords: Rheocasting, Structure Analysis, Fracture Surface, Aluminum Alloys, Light Microscopy, Electron Microscopy.
The possible advantages of applying these properties to process material in a semi-solid state were soon recognized and two different routes were proposed: thixocasting and rheocasting.
However, the difficulty in obtaining a high-quality semi-solid material, together with the lack of a procedure for in situ measuring the rheological properties of the semi-solid slurry, has created some hurdles for the widespread use of the semi-solid casting technologies [1].
Chen, Characterization of semi-solid slurry using a novel “Rheo-Characterizer” apparatus, Journal Of Materials Processing Technology 209 (2009) 5892-5901
Chen, Microstructure and rheological behaviour of hypereutectic semi-solid Al-Si alloy under low shear rates compression test, Materials Science and Engineering A 492 (2008) 377-382
Online since: September 2013
Authors: Xin Da Li, Hai Feng Li, Mu Huo Yu, Magdi E. Gibril, Ke Qing Han, Xuan Zhong, Huan Li, Yue Zhang
Gibril1,a, XindaLi1,b, HaiFeng Li, XuanZhong, Huan Li, Yue Zhang,KeQing Han, Muhuo Yu*1,c 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, China amagdi.gibril@gmail.com,bxindalee@163.com,cyumuhuo@dhu.edu.cn, Keywords: Cellulose, PEG, Blend, Melt extrusion Abstract: To modifying cellulose through an eco-friendly process, an in-situ chemical blend modification of microcrystalline cellulose with PEG2000 was conducted by using co-rotating twin-screw extruder through a reactive extrusion process in the presence of IL namely, 1-N-butyl-3-methylimidazolium chloride which, was acting as plasticizer and solvent for cellulose .
It is well known that Poly(ethylene glycol) (PEG) displays good biocompatibility and biodegradability and is non-toxic and non-immunoreactive, it have been applied to modify cellulose to produce materials for drug delivery [3]; electroactive papers,[4] to prepare a high-strength cellulose/PEG gels,[5] to disperse cellulose nanowiskers in poly(lactic acid),[6] and used to dissolve cellulose using NaOH system.[7] Extrusion is considered as an eco-friendly process, it has been used for the chemical modification of some carbohydrates (starch) [8].
The extruded materials were precipitated in water to remove [Bmim]Cl and the access of PEG, then washed by water many times and filtered.
Klemm, Brigitte Fink, Hans-Peter Bohn and Andreas, Cellulose: Fascinating Biopolymer and Sustainable Raw Material, Cellulose, 44 (2005), 3358-3393
Wang, Y.Huang, K.Li, H.Liao and D.Wang, Dissolution and regeneration of sugarcane bagasse cellulose in ionic liquid, Huagong Xuebao/CIESC Journal, 61 (2011),1592-1598
Online since: December 2013
Authors: Hai Yu Meng, Zhi Qiang Wu, Jun Zhao, Lin Chen, Shu Zhong Wang
Pyrolytic behavior and kinetic analysis of wheat straw and lignocellulosic biomass model compound Zhiqiang WU1,a, Shuzhong Wang1,2,b, Jun Zhao1,c, Lin Chen1,d,, and Haiyu Meng1,e 1 Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi ,710049, P.R.
Figure 1 Thermochemical conversation technologies for lignocellulosic biomass Materials and Methods Materials.
The value of activation energy for cellulose calculated in this paper agreed with previous result. [18] Table 2 The activation energy solved by Flynn-Wall-Ozawa and Kissinger-Akahira-Sunose methods Materials α FWO method KAS method E (kJ·mol-1) R2 E (kJ·mol-1) R2 Wheat Straw 0.2 130.68 0.9575 127.95 0.9511 0.3 169.87 0.8963 168.85 0.8853 0.4 128.02 0.9543 127.74 0.9468 0.5 131.23 0.9768 124.93 0.9728 0.6 144.77 0.9729 141.80 0.9687 0.7 202.96 0.9730 202.68 0.9703 0.8 120.73 0.8689 114.38 0.8429 Average 146.89 - 144.05 - Cellulose 0.2 146.40 0.952 143.71 0.9451 0.3 136.02 0.9955 132.64 0.9843 0.4 134.06 0.9814 130.48 0.9803 0.5 128.88 0.9771 124.93 0.9828 0.6 127.55 0.9990 123.45 0.9881 0.7 126.19 0.9978 121.92 0.9849 0.8 142.79 0.9956 139.22 0.9937 Average 134.56 - 130.91 - Conclusion Pyrolysis characteristics of wheat straw and cellulose were studied through the TG analyzer.
Williams, "Devolatilisation characteristics of coal and biomass blends," Journal of Analytical and Applied Pyrolysis, vol. 74, pp. 502-511, 2005
Meng, "A Kinetic Study of Co-Pyrolysis of Coal and Spent Mushroom Compost (SMC)," Advanced Materials Research, vol. 781-784, pp. 2406-2410, 2013
Online since: May 2014
Authors: Wei Li Wang, Lei Fu, Xue Feng Huang, Ying Zi Jiang
Physical Parameters.The material of the rod is 10 steel, the material of the engine cabin missile skin is LY-12 aluminum, the material of the engine shell is 4340 steel.
The materials all use Johnson-Cook model.
Table 1 The parameters of Johnson-Cook and Grüneisen materials A/MPa B/MPa n c m 10 Steel 7.83 770 285 0.16 0.014 1.03 LY-12 Aluminum 2.78 420 426 0.21 0.012 1.03 4340 Steel 7.84 792 510 0.26 0.014 1.03 Calculation Results Numerical Simulation of Different Conditions.
Nanjing University of Science and Technology(2007)
Study on Damage Effect of Controllable Discrete Rod Fragment Journal of Projectiles, Rockets, Missiles and Guidance, Vol. 28(1) (2009), p. 125-127.
Online since: December 2010
Authors: Chun Lin Qiu, Lin Xiu Du, Yong Da Yang, Xiu Hua Gao
Introduction Hull structural steel is one of the indispensable materials for shipbuilding and offshore platform industry.
Based on the regulations of materials and welding by professional societies and national standards, the main feature we got is excellent low-temperature toughness and weldability.
Therefore, the material could be regarded as weld crack free steel.
Material & Heat Treatment,Vol.2(2008),p.38-41, in Chinese
Journal of University of Science Technology Beijing, Vol. 7(2008),p.724-729, in Chinese
Online since: June 2014
Authors: Chun Yu Qi, Xun Hua Yuan, Qi Fu Zhang
Experimental materials and methods Experimental materials.
Phase structure of GA coating were analyzed by XRD with target material Cu-Kα, acceleration voltage 40 kV, scanning speed 2 °/min.
Acknowledgements This work was supported by the National Natural Science Foundation of China under grant No. 51071052 and National High Technical Research and Development Program of China under grant No. 2012BAJ13B03.
Transactions of Materials and Heat Treatment, 2011, 32(6):132-137 [2] Yuan Xunhua, Liu Xin, Chen Binkai, et al.
Transaction Journal of Material and Manufacture, 1997, 106(5): 182-192 [5] Zhong W, Ng H F and Ichikawa M. the 4th international conference on zinc and zinc alloy coated steel sheet, Makuhari, Chiba, Japan, 1998: 603-607 [6] Zhang Qifu, Yuan Xunhua, Jiang Sheming, et al.
Online since: March 2013
Authors: Qun Sun, Xin Wu Zhan
(2) Information query Background and historical material such as working information and rainfall and flood regime can be queried all round in the form of graphics context quickly and nimbly.
Working information and rainfall and water regime information can be queried by clicking map object directly to learn its attribute information and relevant many kinds of material, or user may input all or partial object names to search map objects which match certain condition, such as pump station, sluice, reservoir, etc, and find out the relevant positions on map and look up correlative material
(3) Operation labeling Some temporary graph objects, such as some temporary headquarters, temporary materials supply centre, danger points, water head, flood control power, etc, can be labeled on map immediately, and user can add relevant information of labeled objects, such as headquarter manning, inventory of materials supply centre, danger illustration, etc
Zhang: “Geographic Information System: Principles, Methods and Applications”, Science Press, 2001 (In Chinese)
Journal of Beijing Institute of Light Industry.
Online since: August 2013
Authors: Ying Ling Wang, Qiu Zhi Gao, Gui Fang Sun, Jie Ye
Corrosion behavior of the Transient Liquid Phase Diffusion Bonding joint of TiNi shape memory alloy and stainless steel in Hanks′ solution Yingling Wanga, Qiuzhi Gao, Guifang Sun, Jie Ye School of Resources and Materials,Northeast University at Qinhuangdao, Qinhuangdao Hebei 066004, China aemail: yinglingwang@yahoo.cn Keywords: TiNi SMA; SS304; Transient liquid phase diffusion bonding; Corrosion behavior Abstract: The transient liquid phase diffusion bonding(TLP-DB)was employed to join TiNi shape memory alloy (SMA) and stainless steel (SS) with an interlayer metal of Ag-Cu eutectic metal foil.The corrosion behavior of the TLP-DB joint in Hanks′ solution at 37℃ was investigated by electrochemical methods.The results show that the corrosion resistance of the joint is comparable to, but lower than that of base metals during the early anodic polarization, and the corrosion rate of the joint is between that of TiNi SMA and SS in the transpassive region at high potentials.
Kaczmarek: Archives of Materials Science and Engineering 28(2007), pp.269-272
Li: Journal of Materials Engineering (in Chinese) 4(2008),pp.48-51
Liu: Materials Characterization 58 (2007),pp. 623–628.