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Influence of casting velocity on surface resistivity of epoxy-hard coal graded composites

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Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Purpose: of this paper was to describe electrical properties of epoxy-hard coal functionally gradient polymeric materials. The experimental part describes preparation of the cylindrical samples of the polymeric gradient material by centrifugal casting method. Influence of casting velocity on electrical surface resistance and surface resistivity was measured and analysed. Design/methodology/approach: The specimens were prepared using centrifugal casting method. Composites with epoxy resin as a matrix and with respectively 3; 4.32; 7.5; 10.68 and 12%vol of two hard coal types as a filler were cast. Surface resistivity was applied as a measure of electrical properties. The idea of the test was to define electrical resistivity in radial direction with different content and type of conductive component (hard coal). First, specimen’s diameter was measured and electrical resistivity was tested. Next, outer layer with thickness about 0,1 mm was removed by turning and electrical measurements performed. The procedure was repeated for all subsequent layers. Findings: The experimental results demonstrated that casting velocity have pronounced influence on surface resistivity of these materials. Hard coal together with epoxy resin formed gradient composite material with different filler content in subsequent layers. Research limitations/implications: The generated graded structure could be controlled only in limited extend by varying rotation speed and material characteristics of components, such as hard coal content and particles size and shape. Originality/value: Hard coal particles were distributed in epoxy resin by centrifugal casting method in order to create functionally graded materials (FGMs). At present, no information is available on the influence of the casting velocity on the electrical properties of these composites. This paper is original also because in the research programme electrical properties of new type of polymeric gradient composites were tested and presented.
Rocznik
Strony
48--56
Opis fizyczny
Bibliogr. 26 poz.
Twórcy
autor
autor
  • Department for Processing of Metals and Polymers, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland, monika.szczepanik@polsl.pl
Bibliografia
  • [1]J.Stabik, A. Dybowska, Methods of preparing polymeric gradient composites, Journal of Achievements in Materials and Manufacturing Engineering 25/1 (2007) 67-70.
  • [2]J.Stabik,M. Szczepanik, Surface resistivity of carbon-epoxy composites produced by centrifugal casting, Monography Engineering polymers and composites (2010) 385-392 (in Polish).
  • [3]J.Stabik, A. Dybowska, Electrical and tribological properties of gradient epoxy-graphite composites, Journal of Achievements in Materials and Manufacturing Engineering 27/1 (2008) 39-42.
  • [4]M.Szczepanik, J. Stabik, M. Łazarczyk, A. Dybowska, Influence of graphite on electrical properties of polymeric composites, Archives of Materials Science and Engineering 37/1 (2009) 37-44.
  • [5]J.Stabik, A. Dybowska, M. Szczepanik, L. Suchoń, Viscosity measurements of epoxy resin filled with ferrite powders, Archives of Materials Science and Engineering 38/1 (2009) 34-40.
  • [6]J.Stabik,M. Szczepanik,A. Dybowska,B. Suchoń, Electrical properties of polymeric gradient materials based on epoxy resin filled with hard coal,Journal of Achievements in Materials and Manufacturing Engineering 38/1 (2010) 56-63.
  • [7]J.Stabik, A. Dybowska, J. Pluszczyński, M. Szczepanik, B. Suchoń, Magnetic induction of polymer composites filled with ferrite powders, Archives of Materials Science and Engineering 41/1 (2010) 13-20.
  • [8]Y.Miyamoto, W.A. Kaysser, B.H. Rabin, A. Kawasaki, R.B. Ford, Functionally graded materials design. processing and applications. Kluwer Academic Publishers, Boston, 1999.
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  • [11]L.A. Dobrzański, A. Kloc-Ptaszna, A. Dybowska, G. Matula, E. Gordo, J.M. Torralba, Effect of WC concentration on structure and properties of the gradient tool materials, Journal of Achievements in Materials and Manufacturing Engineering 20 (2007) 91-94.
  • [12]L.A. Dobrzański, A. Kloc-Ptaszna, G. Matula, J.M Contrereas, J.M. Torralba, The impact of production methods on the properties of gradient tool materials, Journal of Achievements in Materials and Manufacturing Engineering 24/2 (2007) 19-26.
  • [13]L.Jaworska, M. Rozmus, B. Królicka, A. Twardowska, Functionally graded cermets, Journal of Achievements in Materials and Manufacturing Engineering 17 (2006) 73-76.
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  • [15]S. Hashmi, U. Dwivedi, Estimation of concentration of particles in polymerizing fluid during centrifugal casting of functionally graded polymer composites, Journal of Polymer Research 14/1 (2007) 75-81.
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  • [17]M.Shen, M.B. Bever, Gradients in polymeric materials. Journal of Materials Science 7 (1972) 741-746.
  • [18]B.Wena, G. Wub, J. Yu, A flat polymeric gradient material: preparation. structure and property, Polymer 45 (2004) 3359-3365D.
  • [19]P.Wasilewski, Structure and properties of coal, Silesian University Publisher, Gliwice, 1973 (in Polish).
  • [20]D.W.van Krevelen, Coal-topology: physics, chemistry, constitution, Elsevier, Amsterdam-London, (1993) 778-793.
  • [21]Joo-Sang Sun, H.S. Gokturk, D.M. Kalyon, Volume and surface resistivity of low-density polyethylene filled stainless steel fibers, Journal of Material Science 28 (1993) 364-366.
  • [22]M.B. Heaney, The measurement. Instrumentation and Sensor Handbook. Chapter Electrical Conductivity and Resistivity. CRC Press, USA, 1999.
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  • [26]Resin and hardener characteristic chart from Organika - Sarzyna Chemical Plant S.A. (in Polish).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BSL7-0051-0017
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