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This paper focused on optimizing wire cut EDM processing parameters based on the taguchi method to minimize surface roughness. The stir casting technique was used to produce 10 wt% SiO2 aluminum matrix composites as reinforcement. Three processing parameters such as time pulse on time, pulse off time, and current were considered. The orthogonal L9 section of Taguchi was used as the model of the experiment. Analysis of variance (ANOVA) was performed to detect the important parameter affecting surface roughness. The confirmation test was performed to validate the test result. The results revealed that the pulse off time (44.69%) is the most dominant factor affecting the quality of surface roughness followed by current (14%) and pulse on time (4.58%). It can be concluded that the surface roughness can be minimized with this method.

Diesel-powered engines are used worldwide for efficient transportation and stationary power generation. The significant drawback of a diesel engine is its harmful emissions. The stringent emission norms enforced by the different organization demands effective catalyst system to control the gaseous emissions. Diesel oxidation catalysts are the extensively used technique for diesel engines to control HC and CO emissions. Currently the catalyst in the diesel oxidation system employs precious metals such as Pt/Pd/Rh to reduce the emissions and makes the DOC system expensive. This paper presents a cost-effective catalyst prepared to employ non-noble mixed oxides of copper and nickel supported on non-conventional support (i.e.) ceria doped calcium borophosphates (Ce-SCaPB). Initially, ceramic beads (5mm X 5mm) were coated with (Ce-SCaPB) support material. Secondly, the copper and nickel salts were deposited on the Ce-SCaPB coated ceramic beads and subsequently reduced and calcined.