Diagram of machining non conductive advanced ceramics by edm with magnetic powder technique edm mp xu used auxiliary electrode method with magnetic powder technique to process non conductive sio 2 ceramics in edm 65 it was found that low voltage and low current should be used as much as possible in the initial processing stage. Electrical discharge machining edm is one of the priciest machining processes for producing metallic parts with complex linear surfaces and roughness ra of up to 017 02 1 2 3 4 5 modern computer numerical control cnc machines allow producing parts with a positioning accuracy of guiding bars of up to 80 nm 6 7 8 9 . Nanocomposites were obtained by hot press and subsequently machined by wire electrical discharge machining edm the addition of semiconductor and metal phases to a high performance ceramic material produces nanocomposites which preserve the excellent mechanical properties of the ceramic metal material while reaching the electrical conductivity necessary for edm the role of the low . Keywords micro edm electro discharge machining macro edm ceramics assistive edm 1 introduction structural materials such as ceramics metals and polymers have their own advantages and disadvantages metals and polymers are not only suitable for high temperature and wear related applications but also are prone to chemical reactions retention of properties at higher temperatures is . To influence the electrical conductivity of insulating ceramics such as al 2 o 3 si 3 n 4 and zro 2 a secondary electrically conductive phase is incorporated into ceramics which allows machining by edm a successful approach was achieved by yoo et al 2015 with the sic ceramic reinforcement by yttrium nitrate yn
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