Search results

Study on Mechanical Properties of Polyurethane Elastomers for Drum Scraper Jincui Zhang1,a, Xijun Liu1,2,b, Tiening Ma1,c 1College of Materials Science and Engineering,Qiqihar University, Qiqihar 161006, China 2Key Laboratory of Polymer Modification and Macromolecules Separation, College of Heilongjiang Province, Qiqihar 161006, China azhangjc0452@163.com, bliuxijun2002@163.com,ctieningma@163.com Keywords: polyurethane elastomer; drum scraper; mechanical properties; chain extender Abstract: Polyurethane elastomers (PUE) were prepared by casting method using the prepolymer and the chain extender.
In this work, the PUE for drum scraper were prepared by casting method choosing poly(tetramethylene glycol ether) (PTMG) and toluene diisocyanate (TDI) as raw materials, and 3,5-dimetylthio toluene diamine (DMTDA, product code E-300) as chain extender.
Experimental Section Materials.
Liu: Chemical Propellants & Polymeric Materials.Vol. 3(5)(2005), p.232
Xu: Journal of Materials Processing Technology.

Concrete had been a well known base material for construction worldwide.
Supplementary material such as silica fume or fly ash is very well-know to effectively reduce the total volume of pore.
Lime stone powder can also be used as a filling material to fill pores in concrete [4].
Experimental Procedure Materials used in this research consisted of Ordinary Portland cement (Elephant brand, complying with ASTM Type I, manufactured by Siam Cement Co., Ltd.), river sand, coarse aggregate (MSA 25mm) had specific gravities of 2.70 and water absorptions of 0.38%., water, Superplasticizer (Sika® ViscoCrete® -10, polycarboxylic acid-based) and quarry dust collected from the quarry industry located in The East of Thailand.
ARPN Journal of Engineering and Applied Sciences 4(4): 83-89 [4] Menadi B., Kenai S., Khatib, J., Aı¨t-Mokhtar A. (2009),"Strength and durability of concrete incorporating crushed limestone sand" Construction and Building Materials 23 (2009)

Study on the Recognition of the Registration Marks for Low-Energy Microcolumn Lithography Seungjoon Ahn1,a*, Ho Seob Kim 1,b , Dae-Wook Kim 1,c and Seong Joon Ahn2,d 1 Department of Physics & Advanced Material Science/CNST, Sun Moon University, Korea 2 Division of I&C Engineering/CNST, Sun Moon University, Korea a sjan@sunmoon.ac.kr, bhskim3@sunmoon.ac.kr, cphykdw@sunmoon.ac.kr, d sjahn0@sunmoon.ac.kr Keywords: Low-energy lithography, microcolumn, recognition of the registration mark, PMMA resist, SiO2/ITO.
Besides, the low-energy electrons make little mechanical damage to the materials being processed and have very small proximity effect caused by electron scattering that results in degradation of image quality.
Therefore the BSE intensities are different each other according to the materials where the back-scattering take place, and it would be desirable to select the materials of the substrate and registration mark whose attractive forces on electron are different very much.
Materials Line ① Line ② Line ③ Line ④ Average SiO2 42500 52500 55000 57500 51875 Si 15000 20000 15000 20000 17500 ITO 42500 50000 45000 30000 41875 Glass 25000 30000 32500 22500 27500 Summary While the low-energy microcolumn lithography has great advantages as a future semiconductor processing technology, there are several problems remained.
Ahn: Journal of the Korean Physical Society Vol. 49 (2006), p.

In order to provide convenient, quick, safe and efficient traffic in winter, thawing-out materials with salt are often scattered to such as roads, bridges and city overpasses to thaw out ice or snow so as to prevent slipping.
There are usually two possible ways for chloride ion intrusion in concrete: one is impregnation with chloride ion in raw material or in other admixtures.
All the sources of chloride ion in concrete include in sea environment, industrial environment, raw materials and thawing-out materials.
Acknowledgements This work was financially supported by 2011Science and Technology Research Project of Beijing Municipal Education Commission (KM201110016012) and by Beijing Higher Institution Engineering Research Center of Structural Engineering and New Materials, BUCEA.
ACI Materials Journal, 2003, 100(2): 114- 119

Influence of Processing Parameters on Interfacial Heat Transfer Coefficient at the Metal-Die Interface of Die Cast AM50 Alloy Zhipeng Guo 1, a, Shoumei Xiong 1,b, Sang-Hyun Cho2,c and Jeong-Kil Choi2,d 1 Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China 2 Advanced Material R&D Center, Korea Institute of Industrial Technology, 994-32, Dongchun-Dong, Yonsu-Ku, Inchon, Republic of Korea a gzp04@mails.tsinghua.edu.cn, bsmxiong@tsinghua.edu.cn cchosh@kitech.re.kr, dcjk@kitech.re.kr Keywords: Interfacial heat transfer coefficient; High pressure die casting process; AM50 alloy Abstract.
The casting material is AM50 and the die material is H13.
Charles-André Gandin and Michel Bellet, TMS (The Minerals, Metals & Materials Society), 2006, p. 1205
Pehlke: Metallurgical and Materials Transactions Vol. 16B (1985), p. 585
Nef: Journal of Materials Processing Technology Vol. 169 (2005), p. 223

This positive link will enrich the understanding of the reader to the reading materials.
The teacher will make appropriate adjustments based on students' feedback, their understanding of the course and their needs to learn. 2.2 Classroom interaction Different from preview, classroom teaching is to complete the reading task, to deepen students' understanding of the materials to be learned.
JiTT approach encourages students to learn to focus clearly on the challenging problem of the reading materials.
Journal of Harbin University, 2002(2): 13-16.
Science and Technology Development and Strategy, 2002(12): 155-156.

Materials and Methods.
Results and Discussion Index and compaction properties: The particle distribution curves of the study soil presented in Figure 1 indicate that the soil contains 16.88% clay-sized materials (percentage smaller than 2µm) as determined by sedimentation analysis.
Khire, Earthen Materials in surface Barrier.
Cousens, Shrinkage and Desiccation Cracking in Bentonite- Sand landfill liners, Engineering Geology, Elservier Science 60 (2001) 263 – 274
Amadi, Desiccation induced shrinkage in compacted lateritic Soil – bentonite mixtures proposed as landfill barriers, Proc. of Bimonthly Meeting/Workshop Materials Society of Nigeria (MSN), Zaria Chapter, Jan. – Dec. (2007) 57 – 66

Journal of Combustion Science and Technology,2001,7(1):52-56.
Journal of Combustion Science and Technology, 1999,5(2):211-217.
Journal of Engineering Thermophysics,2002,23(4):517-519.
Journal of Combustion Science and Technology,2001,7(1):35-38.
Beijing: science press, 1994. 126−195.

Today, the application of dominant construction materials with higher working characteristics is becoming matter of course.
Some of the material characteristics of the tested beams over approximately (28-35) days are listed in Tab. 1.
In: Building Research Journal, 2012, vol. 60, no. 3-4, pp. 211-222, (2012 – Emerald Abstracts, Emerald), ISSN 1335-8863
In: Applied mechanics and materials, 2015, vol. 769, p. 294-301.
In: Building Research Journal, 1985, 33, No. 2 , p. 87-114

Afer three-dimensional entity model of working mechanism was built, rigid bodies, materials and marker points were defined by Mechanism/pro in Pro/E environment.
Afer rigid bodies, materials and marker points all had been defined, the date was transfered from Pro/E to ADAMS, and then unconstrained rigid model of working mechanism was built.
The steps using ANSYS to create Modal Neutral File is: Defining element type and real constant→Defining material→meshing→Defining rigid areas and interface nodes→generating Modal Neutral File.
Acknowledgements This research is supported by National Natural Science Fundation of China(51005232).
References [1] Guoming Cheng, Kan Huang and Sijing Wang: Mining and Metallurgical Engineering Vol.23(2003), p.4-6 [2] M.Senyur, Gurel, A.Cengiz, Kemal: Journal of Mines Metals and Fuels Vo.11(2003), p.356-359 [3] M.J.Lukhele: Journal of The South African Institute of Mining and Metallurgy Vo.3(2002), p115-119 [4] Jianping Li: Study on Design Ttheory and Key Technology of The Auger Drill Miner(China University of Mining and Technology Press, China 2006)