Abstract
ABSTRACTThis paper reports a study on erosion response of epoxy composites filled with micro‐sized Linz–Donawitz (LD) slag particles. LD slag is a major solid waste generated in huge quantities during steel making. It comes from slag formers such as burned lime/dolomite and from oxidizing of silica, iron etc. while refining the iron into steel in the LD furnace. Although a number of ways for its utilization have been suggested in the past, its potential as a filler material in polymeric matrices has not yet been explored. In this work, composites of five different compositions (0, 7.5, 15, 22.5 and 30 wt% of LD slag reinforced in epoxy resin) are prepared by a simple hand layup technique. The composites are characterized in regard to their density, porosity, micro‐hardness and strength properties. Erosion trials (ASTM G 76) are conducted on the composite samples following a well‐planned experimental schedule based on Taguchi's design of experiments. The study reveals that the impact velocity and LD slag content in the composites are the most significant among various factors that influence the wear rate. This work shows that LD slag, in spite of being a waste, possesses fairly good filler characteristics as it modifies the properties and improves the erosion resistance of the polymeric resin.
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