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Online since: November 2022
Authors: Gary Scott Collins, Matthew O. Zacate, Randal L. Newhouse, Prastuti Singh
Mehrer, Diffusion in Solids: Fundamentals, Methods, Materials, Diffusion-Controlled Processes, Springer Series in Solid-State Sciences, vol. 155, 2007. ].
Okamoto, eds., Phase Diagrams of Indium Alloys and Their Engineering Applications, ASM International, Materials Park, OH, 1992. ] and the solubility limit of In in solid-Ga has been found using PAC to be at a mole-fraction of 10-11 [[] Xiangyu Yin, Indium solubility in a-gallium and gallium-indium eutectic alloys studied using PAC, MS thesis, Washington State University, 2011 (unpublished). ].
Okamoto, eds., Phase Diagrams of Indium Alloys and Their Engineering Applications, ASM, Materials Park, OH, 1992. ].
Collins, Nonstoichiometry in line compounds, Journal of Materials Science 42 (2007) 1915-1919. ].
Acknowledgment This research was supported in part by grants DMR 05-04843, 09-04096, and 18-09531 from the National Science Foundation.
Online since: November 2013
Authors: Anupam Agnihotri, Shail Umakant Pathak, Jyoti Mukhopadhyay
Metal instabilities and its effect on cell performance during aluminium smelting A Agnihotri1,a, S U Pathak2,b and J Mukhopadhyay3,c 1Scientist-V, Jawaharlal Nehru Aluminium Research Development and Design Centre, Wadi, Nagpur – 440023, Maharashtra, INDIA 2Professor, Department of Metallurgical & Materials Engineering, Visvesvaraya National Institute of Technology, Nagpur 440010, Maharashtra, INDIA 3Visiting Professor, Department of Material Science and Engineering, Indian Institute of Technology, Gandhinagar 382424, Gujarat, INDIA aaaagnihotri@yahoo.com, bsupathak@mme.vnit.ac.in, cjm@iitgn.ac.in Key words: Aluminium, magnetic field, cell voltage, instability, noise, voltage Abstract The Hall-Heroult process for the production of aluminium is based on the electrochemical reduction of alumina (Al2O3) dissolved in a cryolite (Na3AlF6) based electrolyte.
It is true that back reaction is one of the important factors for lowering of current efficiency but there are many other factors as listed below which play important role in lowering of current efficiency: · Other material being co-deposited · Some of the products reduced at the cathode may remain in electrolyte phase and subsequently be re-oxidised (current stealing) · Electronic conductivity of electrolyte and physical short circuiting · Other heterogeneously formed compounds Unstable cell operation can be judged by abnormal value of counter electromotive force.
References [1] K Grojtheim and H Kvande, “Understanding the Hall-Heroult process for production of aluminium”, 2nd ed., Aluminium- Verlag, Düsseldorf, 1986 [2] K Grojtheim, C Krohn, M Malinovsky, K Matiasovsky and J Thonstad, “ Alumnium eletrolysis – Fundamentals of the Hall-Heroult Process”, 2nd ed., Aluminium- Verlag, Düsseldorf, Federal Republic of Germany, 1982 [3] 3a W F Lewellyn, “Determination of the counter electromotive force on operating aluminium reduction cells”, Journal of Metals, July, 1970, pp 57 - 29 [4] Thomas M.
Online since: November 2022
Authors: Nadra Harchaoui, Hong Xu, Jean François Wax
Wax, Applicability conditions of the Stokes formula, AIMS Materials Science, 8(5) (2021) 809–822
Sutherland, A Dynamical Theory of Diffusion for Non-Electrolytes and Molecular Mass of Albumin, The Philosophical Magazine and Journal of Science 9 (1904) 781-785
Online since: October 2011
Authors: Hong Shi, Lin Kai Qi
At present, the industrial pollution sources of the lake are mainly concentrated in textile industry, chemical raw materials and chemical products manufacturing, food industry etc.
In the governance of the Thames, science and technology support are very important.
Acknowledgements National Social Science Fund: co-management of water pollution in Tai Lake Basin model and its application (07bjy068).
[5] LiPan Jiang, Basic experience of the British governance of the Thames, Journal of Chinese fishery economic research.2 (1999) 40.
Online since: August 2017
Authors: S. Rajendran, R. Premila, K. Kesavan
[5] Young-G Lee,Jung-Ki Park, Electrochemical characteristics of polymer electrolytes based on P(VdF-co-HFP)/PMMA ionomer blend for PLIB, Journal of Powersources 97-98 (2001) 616-620
[7]A.S.Arico, P.G.Bruce, B.Scrosati, J.M.Tarascon, W.V.Schalkwijk, Nanostructured materials for advanced energy conversion and storage devices,Nat.Matter 4 (2005) 366-377
[22] Mac Callum JA, Vincent CA(1987) polymer electrolyte reviews-I,Elsevier Applied Science, London
[23] R.Baskaran, S.SelvasekaraPandian, N.Kuwata, J.Kawamura,T.Hatton, ac impedance, DSC and FT-IR investigations on (x) PVAc–(1−x) PVdF blends with LiClO4, Materials Chemistry & Physics 98 (2006) 55-61
Online since: June 2007
Authors: T. Kodaka, Sayuri Kimoto, R. Kato, S. Sunami, Fusao Oka
Non-linear Hardening Rule The evolutional equation for hardening parameter *ijχ is given by d * ijχ =B*(A*de pij - *ijχ d *P γ ) (20) in which A* and B* are material parameters.
A* is related to the stress ratio at failure, namely, A* =M* f [= ( 2/1** )ijijηη at failure) (21), B* = G p /M* f (22) B* also complies with an evolutional equation as B* =Cf (B * * 1 *) p dB γ− (23) in which B*1 and Cf are material parameters.
The soil material of the embankment is modeled by the elasto-plastic model proposed by Oka et al. (1999).
The material parameters are listed on Table 1.
T. van Genuchten: A closed-form equation for predicting the hydraulic conductivity of unsaturated soils, Soil Science Society of America Journal, Vol. 44 (1980), pp. 892-898
Online since: June 2016
Authors: Iwan Sanjaya Awaluddin, Indra Djodikusumo, I. Nengah Diasta
Before running simulation in ANSYS Fluent, the following steps need to be done: · import mesh model from ANSYS TurboGrid, · set unit used and standard gravity acceleration in General Tab, · set turbulence model in Models Tab, · set working fluid in Materials Tab, · set working fluid motion in Cell Zone Conditions Tab, · set boundary conditions in Boundary Conditions Tab, · set mesh interfaces in Mesh Interfaces Tab, and · initialize solution The steps below explain changes in settings in each tab in ANSYS Fluent, which means default value is used if stated otherwise for minimal computational resources.
Fig. 28 General Tab setting Fig. 29 Models Tab setting Fig. 30 Materials Tab setting ANSYS TurboGrid names each surface before exporting to ANSYS Fluent to ease setting process of boundary conditions.
Djodikusumo, et al, Design and 3-D Modeling of a Propeller Turbine Runner Utilizing NACA Profile, ITB Journal of Engineering and Technological Science (in review)
Online since: February 2011
Authors: Cecilia Borgonovo, Diran Apelian
The aerospace industry led the application and use of composite materials in spacecrafts components.
Tool selection is limited to a small group of extremely hard and expensive materials.
When pressures of some GPa are applied, nano-materials can be manufactured.
Sorti: AIChE Journal Vol. 45 No. 7 (2009)
Jamaludin: 1st International Conference on Sustainable Materials (ICoSM2007) (2007)
Online since: October 2013
Authors: Amitava Ghorai, D. Roy
Introduction Whenever two materials are joined an interface is created.
Junction can be treated as a sandwich material which can modulate the transport properties of individual materials.
The easiest set up for low melting materials is the resistive heating method.
An interface is defined as the region exhibiting properties differing from the joined materials.
Sen and Suchitra Sen, Journal of Materials Research 7, 1377, 1992
Online since: May 2012
Authors: Pei Ji Shi, Zheng Zhao, Ying Chen, Hui Hui Sun
China Land Science.
China Land Science, Vol.23, No.5 (2009):P.76-80.
China Land Science, Vol.19, No.2 (2005):P.3-8.
Chinese Journal of Soil Science, Vol.42, No.4 (2011):P.795-800.
China Land Science, Vol.18, No.2 (2004):P.21-28.
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