Abstract

Composites are engineered or naturally occurring materials made out of two or more constituents. To obtain the better properties of composites material its individual constituents are modified. A composites material is difficult to carry out due to the anisotropic and non-homogeneous structure of composites and to the high abrasiveness of their reinforcing constituents. In this present work of the mechanical and thermal properties of E-glass/Epoxy composite materials with fillers (Al2O3 and SiO2) has pointed to investigate the materials added to the matrix help amending the mechanically operating properties and thermally affected of a composite. The results of various characterization tests are reported here. This includes evaluation of tensile strength, torsion test, hardness test, thermal conductivity, thermal expansion coefficient measurement, fire resistance test and flame propagation rate has been experimentally recorded.  As per the experimental results, this present work conclude that if we mixing 20% of Al2O3 or SiO2with 50% of fiber and 30% of resins to make a composite material then we can easily see the SiO2have a greater mechanical properties than Al2O3 , so this present work proposed to SiO2instead Al2O3 where the greater strength needed. It also observed that composites filled by (20% Vol) Al2O3 and (25% Vol) SiO2exhibited low thermal conductivity it may be due to that while heating of materials slow chemical reaction takes place in Al2O3 and SiO2and releases the small amount of water and this released water resist the heat flow and seems possible that there is a fundamental difficult in transferring heat from the matrix to the fibers. Increase the addition of Al2O3 and SiO2to composites reduces the thermal expansion coefficient. It has been noticed that (25% Vol) Al2O3 and SiO2filled composite exhibited less thermal expansion coefficient this may be by adding the more fillers in composite materials providing good filler matrix interaction in the system, the filler binds the matrix and prevents it from expanding as much as it would on its own. The flammability of composites is reduces when addition of thermally active fillers like oxides to the polymer matrix is tried. From the results it is observed that increase the loading of SiO2increase the time to ignition and reduces the flame propagation rate because Al2O3 and SiO2is active in both the condensed and gas phases of the combustion process and it is remarkably effective in suppressing flaming combustion and smoke.

Keywords: Thermal Properties, E-Glass/Epoxy, Composite Materials