Investigation of material removal characteristics in EDM of nonconductive ZrO2 ceramic

Sabur, Abdus and Ali, Mohammad Yeakub and Maleque, Md. Abdul and Khan, Ahsan Ali (2013) Investigation of material removal characteristics in EDM of nonconductive ZrO2 ceramic. Procedia Engineering, 56. pp. 696-701. ISSN 1877-7058

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Abstract

The use of nonconductive ceramic materials is increasing rapidly in industrial and engineering applications due to its high hardness, low thermal conductivity, and resistance to oxidation. Machining operations for fabricating structures from nonconductive ceramic materials are difficult and most of the traditional machining techniques are not applicable because of its high brittleness. Electro discharge machining (EDM) technique, a noncontact machining process, is applied for processing nonconductive ceramic ZrO2 using assisting electrode. In this technique, pyrolytic carbon layer on the ceramic surface formed by the cracked carbon from the carbonic dielectric, plays the key role for continuous EDM. The formation of pyrolytic carbon and its stability depends upon the input power, workpiece material, tool electrode material, dielectric substance, polarity, and discharge duration. In this study, experiments were done to investigate the effect of input power on the material removal rate (MRR) and to explore the material removal mechanism. The experimental results show that the material is removed in EDM of nonconductive ZrO2 ceramic mostly by spalling and it increases with the increase of input power.

Item Type:	Article (Journal)
Additional Information:	4751/35541
Uncontrolled Keywords:	Nonconductive ceramic; electro discharge machining; assisting electrode; pyrolytic carbon
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Prof. Ir. Dr. Mohammad Yeakub Ali
Date Deposited:	10 Feb 2014 10:58
Last Modified:	24 May 2018 14:51
URI:	http://irep.iium.edu.my/id/eprint/35541

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