Affiliation:
1. Laboratory for Process Technology, IMTEK-Department of Microsystem Engineering, University of Freiburg, Georges-Koehler-Allee 103, Freiburg 79110, Germany e-mail:
Abstract
Electrical discharge machining (EDM) is widely used to manufacture complex shaped dies, molds and critical parts in conductive materials. With the help of an assisting electrode (AE), EDM process can be used to machine nonconductive ceramics. This paper evaluates the mechanical properties of three high-performance nonconductive ceramics (ZrO2, Si3N4, and SiC) that have been machined with the EDM process using AE. Mechanical properties such as Vickers hardness (HV 0.3), surface roughness (Sq), and flexural strength of the machined and the nonmachined samples are compared. The EDM process causes decrease in Vickers hardness, increase in surface roughness, and decrease in flexural strength.
Subject
Industrial and Manufacturing Engineering,Process Chemistry and Technology,Mechanics of Materials
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