A Review on Different Dielectric Fluids and Machining of Si3N4 and Al2O3 Composites via EDM

The limited efficiency and lack of feasibility of traditional manufacturing processes (TMPs) in ceramic industry restrict their applications in the machining of the ceramic materials having high hardness and brittleness. The use of unconventional methods of manufacturing overcomes the constraints of the conventional processes and therefore finds an enormous application in the industrial sector. The present study primly focuses on the electrical discharge machining (EDM) of ceramic composites and reviews the different dielectric fluids that are being used in the modern machining, along with their effects on different EDM parameters like material removal rate (MRR), tool wear rate (TWR), surface roughness (SR), and surface hardness (SH) as well as the ability of EDM for machining the ceramic composites. It focuses on the main input parameters of EDM which influence the metal cutting procedure and discusses the machining of the ceramic materials like Al2O3- and Si3N4-based using EDM. The current study reveals that EDM is one of the best methods in machining the ceramic composites because of its high efficiency, high precision, and accuracy.