Abstract
Abstract The grinding of Si 3 N 4 ceramics is difficult due to their inherent hardness, brittleness, and machining-induced damages. The effects of environmentally friendly mono and hybrid nanofluids are investigated on grinding forces, specific grinding energy, grinding force ratio, surface integrity and surface/sub-surface damages during grinding of Si 3 N 4 ceramics. The experimental results indicated superior lubrication properties of MoS 2 nanoparticles based nanofluids. The reduction in normal grinding force and specific grinding energy for MoS 2 – WS 2 hybrid nanofluids has been 27% and 39% respectively, compared to deionized water base fluid. The surface roughness and chipping layer depth of silicon nitride workpieces using MoS 2 – WS 2 hybrid nanofluid have been reduced by 41% and 86% in comparison to flood grinding. The thermally stable oxides on ground surface attributed to grindabilty improvement.
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