Authors: Renjie Ji Yonghong Liu Yanzhen Zhang Baoping Cai Jianmin Ma Xiaopeng Li
Publish Date: 2011/07/28
Volume: 59, Issue: 1-4, Pages: 127-136
Abstract
Silicon carbide SiC ceramic has been widely used in modern industry because of its superior mechanical properties wear and corrosion resistance even at elevated temperature However the manufacture of SiC ceramic is not an efficient process by conventional machining methods This paper employs a steeltoothed wheel as the tool electrode to machine SiC ceramic using electric discharge milling The process is able to effectively machine a large surface area on SiC ceramic To further improve the process performance three kinds of emulsion are proposed as the dielectric in this paper The effects of dielectric tool polarity pulse duration pulse interval peak voltage and peak current on the process performance such as the material removal rate MRR and surface roughness SR have been investigated Furthermore the microstructure of the machined surface is examined with a scanning electron microscope SEM an energydispersive spectrometer EDS and Xray diffraction XRD
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