Search results

Estimation of Contact Interface between Tool and Workpiece in Cold Forming Using FEM Analysis Hiroyuki Saiki1 , Yasuo Marumo1,a , Liqun Ruan1 , Junpei Kozasa1 1 Department of Mechanical Engineering and Materials Science, Kumamoto University, 2-39-1 Kurokami, Kumamot 860-8555, Japan a marumo@gpo.kumamoto-u.ac.jp Keywords: Forging, Contact conditions, Flow stress, Tribology, Solid lubricant, Lubricant film thickness Abstract.
Minami, Journal of CSME, 26(2006)7, 683-687 (in print)
Geiger, Journal of Materials Processing Technology, 45(1994)613-618
Sonoi, Journal of Materials Processing Technology, 113(2001)22-27
Im, Trans. of ASME, Journal of Engineering for Industry, 111(1984)337-343

They used burnt clay volcanic pumices, fly ashes and mineral slags as raw materials with the effect of alkali activator and the use of appropriate technology to form a compact high-strength material dominated by aluminum oxygen tetrahedron and silicon-oxygen tetrahedron with amorphous and quasicrystalline characteristics of three-dimensional network.
We used hydrothermal synthesis method to prepare zeolite enhanced geopolymer material in the research and static experiment to study the adsorption performances and mechanisms of materials on Sr2+, Co2+ and Cs+, for the theological basis of solid chemical waste, toxic heavy metal ions and radioactive nuclear waste [1] adsorption. 2 Materials and experiments 2.1 Raw materials and preparation We used three major materials, metakaolin, which obtained from Beihai Yanzhou mining kaolin Co., Ltd.; fly ash, which was from Tiandong power plant in China, Guangxi; sodium hydroxide, which containing sodium hydroxide 96% and bought from the market with analytical grade.
Table 1 Chemical compositions of metakaolin and fly ash raw materials SiO2 [%] Al2O3 [%] Fe2O3 [%] CaO [%] MgO [%] LOI [%] specific surface area [m2/kg] metakaolin 54.75 41.24 0.96 0.00 0.30 0.78 724 fly ash 56.74 30.37 6.47 1.68 1.82 0.93 524 2.2 Experimental methods 2.2.1 The preparation of metakaolin-fly ash geopolymer Metakaolin and fly ash were took as raw materials, and a certain concentration of sodium hydroxide solution was added after the well-mixing of raw materials.
Journal of Hazardous Materials 2008, 157:587–598 [2] Y.S.
Journal of Hazardous Materials .2009,171: 820–826

The making steel process results in dust and slurry that can be used as a secondary raw material in the composition stack of ferrous materials for the sintering process.
Together with other raw materials rich in Fe, SiO2 and CaO, these waste can be significant in quality ferrous agglomerate due to the useful elements contained.
These measurements are important for the possible introduction in the agglomeration process in appreciable quantities to the agglomerate, to obtain cast iron materials in blast furnaces [1-3].
This is determined by the influence of secondary raw materials at which add the ties occurring between the formation phases from agglomerate.
Heput, Broadening of Raw Materials in the Steel Industrz, bz Reczcling and Recoverz Wastes, World Academz of Science, Engineering and Technologz, 2012, Volume 71; [5] Tetsuzo HAGA, Tetsuharu IBARAKI, Kenji KATOH, Technical developments for Saving Natural Resources and Increasing Material Recycling, Nippon Steel Technical Report No.101, 2012, ISSN 293-8511; [6] V.

The purpose of the introduction of the concept are: not specific to Solve the stress and strain fields, while the focus of the main features of material structure into account by constructing a mathematical model to calculate the material structure on the load response.
Xu: Sensitive skin and the relative sensing system for realtime surface monitoring of crack in civil infrastructure, Journal of Intelligent Material Systems and Structures, Vol. 17 (2006), p. 907 [3] H.
Cox: The elasticity and strength of paper and other fibrous materials, British Journal of Applied Physics, Vol. 3 (1952), p.72 [4] C.
Zhang: In-situ damage evolution and micro/macro transition for laminated composites, Composites science and technology, Vol. 47, No.2 (1993), p.107 [8] J.
Computational Materials Science, Vol. 13, No.1-3 (1998), p. 195 [9] J.

Experiment Materials Double functional polyurethane acrylate and Hyper-branched special functional acrylic ester are from Zhongshan qianye new materials co., LTD.; Trimethylol propane triacrylate, TMPTA and Tripropylene glycol diacrylate, TGPDA are from Jiangsu Iitian technology co., LTD.; Photoinitiator 1173 (2-hydroxy-2-methyl-1-phenyl-1-acetone) Changsha is from xinyu polymer Technology Co.
a b c d Fig.2 Side view of the product cured in different radiation time Note: The radiation intensity 650 Wm/cm2; distance between the lamps and the cavity end 55mm; mold temperature and UV materials 25 ℃ The middle groove of the mold cavity was selected as the measurement target in the experiment.
Injection molding product weight: online prediction and control based on.nonlinear principal component regression model[J], Polymer Engineering and Science,2006,46(4); 540-548
Experimental investigation and numerical simulation of injection molding with micro-features.Polymer Engineering and Science, 2002, 42(5): 871-888
Investigation of micro-injection moulding: factors affecting the replication quality [J].Journal of Materials Processing Technology,2007.183: 284-296.

Several types of materials belong to this class, e.g.
A number of trials with different settings were made with ABS and PLA materials resulting in various defects, see Fig. 6.
Final cost of all components and materials employed was 311 €.
Connal, Extrusion 3D Printing of Polymeric Materials with Advanced Properties, Advanced Science. 7 (2020). https://doi.org/10.1002/advs.202001379
Langstonirst, 3D Printing: A Custom-Built 3D Printer with Wireless Connectivity, International Journal of Computer Science and Engineering. 7 (2020) 1–5. https://doi.org/10.14445/23488387/ijcse-v7i10p101

Compared to other methods of additive manufacturing, SLS can produce parts from a relatively wide range of commercially available powder materials.
And, depending on the material, up to 100% density can be achieved with material properties comparable to those from conventional manufacturing methods.
Fig. 1: A typical SLS machine layout Materials and Devices.
Tansey, Alternative materials for rapid tooling, J.
Hon, Optimizing build parameters for improved surface finish in stereolithography, International Journal of Machine Tools and Manufacture 38 (1998) 329–342

Thus, the use of wood-replacement materials is the mean to heal the situation of wood lacking.
Therefore, the price of the wood flour composites is rather cheap because the raw materials can be obtained from waste of furniture industry.
Journal of Applied Polymer Science, 69 (1998) 1891-1899
Jubsilp, High performance wood composite from highly filled polybenzoxazine, Journal of Applied Polymer Science, 99 (2006) 1240-1253
Hemvichian, Effects of gamma radiation on thermal properties of benzoxazine filled with carbon black, Applied Mechanics and Materials, 744-746 (2015) 1394-1397

Effect of Substrates Thermal Etching on CVD Growth of Epitaxial Silicon Carbide Layers Wlodek Strupinski 1,a, Kinga Kościewicz 1,3,b , Jan Weyher2,c, Andrzej Olszyna3,d 1 Institute of Electronic Materials Technology, Wolczynska 133,str.,01-919 Warsaw, Poland 2 Radboud University Nijmegen, IMM, Applied Materials Science, Toernooiveld 1, 6526 ED Nijmegen, The Netherlands 3Materials Science and Engineering, Warsaw University of Technology, Woloska 141,str., 02-507 Warsaw, Poland awlodek.strupinski@itme.edu.pl, bkinga.kosciewicz@itme.edu.pl, cJ.Weyher@science.ru.nl, d aolszyna@meil.pw.edu.pl Keywords: SiC, silicon carbide, thermal etching, epitaxy, CVD, defects, surface morphology.
The unique SiC properties, superior in comparison to standard semiconductors, can be utilized only when the material is of high quality.
Type of defects may be different depending on the material (mainly the crystal structure) and the epi-growth mode.
Removing of all damaged material of the substrate by deeper etching ensures good morphology of epi-layer.
References [1] H.Tsuchida, I.Kamata and M.Nagano: Journal of Crystal Growth Vol. 306 (2007), p.254 [2] T.Hori, K.Danno and T.Kimoto: Journal of Crystal Growth Vol. 306 (2007), p.297 [3] S.Ha, H.J.Chung, N.T.Nuhfer, M.

Due to the shortage of wood resource, manufacturers often use the raw materials mixed with softwood and hardwood.
For example, softwood used to be the main raw materials of fiberboard.
However, manufacturers have to mix a certain proportion of hardwood or other materials into the raw materials.
Due to the differences of softwood and hardwood, the manufacturing processes have to be adjusted according to the types and ratio of wood raw materials.
Rapid prediction of wood crystallinity in Pinus elliotii plantation wood by near-infrared spectroscopy[J], Journal of Wood Science, 2007, 53:449–453