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

摘要: Purpose: of this paper was to describe electrical properties epoxy-hard coal functionally gradient polymeric materials. The experimental part describes preparation the cylindrical samples material by centrifugal casting method. Influence velocity on surface resistance and resistivity measured analysed. Design/methodology/approach: specimens were prepared using Composites with epoxy resin as a matrix respectively 3; 4.32; 7.5; 10.68 12%vol two hard types filler cast. Surface applied measure properties. idea test define in radial direction different content type conductive component (hard coal). First, specimen’s diameter tested. Next, outer layer thickness about 0,1 mm removed turning measurements performed. procedure repeated for all subsequent layers. Findings: results demonstrated that have pronounced influence these Hard together formed composite Research limitations/implications: generated graded structure could be controlled only limited extend varying rotation speed characteristics components, such particles size shape. Originality/value: distributed method order create materials (FGMs). At present, no information is available composites. This original also because research programme new composites tested presented.