Abstract
Filler plays a major role in determining the properties and behavior of particulate composites. In this study a series of glass fiber reinforced polyester composites are fabricated using flyash, aluminum oxide (Al 2O3) and silicon carbide (SiC) particles as filler materials. The effects of these three different ceramics on the mechanical properties of glass—polyester composites are investigated. Comparative analysis shows that with the incorporation of these fillers, the tensile strength of the composites decrease significantly. The flexural properties, interlaminar shear strength, density and hardness are also affected by the type and content of filler particles. It is found that the presence of SiC improves the hardness of the glass—polyester composites, whereas the other two fillers show marginal effect. The study reveals that the reduction in tensile strength is the minimum in case of flyash among all the fillers. Further, the composite with low flyash content (10 wt%) exhibits improved flexural strength. It is thus interesting to find that an industrial waste-like flyash shows better filler characteristics compared to those of alumina and SiC. Moreover, being cheap and easily available, it would hopefully provide a cost effective solution to composite manufacturers.
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