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Development of Powder Metallurgy (PM) compacted Cu-TaC electrode for EDM

Mohammed , Baba Ndaliman and Khan, Ahsan Ali (2011) Development of Powder Metallurgy (PM) compacted Cu-TaC electrode for EDM. In: International Conference on Mechanical, Automotive and Aerospace Engineering 2011 ICMAAE '11, 17-19 May 2011, Kuala Lumpur, Malaysia.

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Abstract

The main aim of this paper is to investigate the properties of TaC-Cu electrodes produced by Powder Metallurgy (PM) method. The design of Experiment (DOE) method was used to plan the investigation. Two different compositions of the powders (Cu-TaC with 30 and 55 % wt TaC) were used. The major properties which determine suitability of electrodes for Electro Discharge Machining (EDM) are electrical conductivity,thermal conductivity and to some extent density. These properties were measured for the green compacted electrodes,analyzed and compared with their sintered counterparts. This is the initial stage to determine the suitability or otherwise of the compacted electrodes. The results showed that the compacted electrodes in green form can be suitable for EDM, since the electrical conductivities are very high (94.96 – 189.92�-1m-1). The thermal conductivity is good (29.70 – 33.20W/ m K). The density ranges between 6.13 and 9.80 g/cm3. The sintered electrodes were found to be unsuitable at the specified conditions, because they became non-conductive electrically after sintering. Current efforts are geared towards improving these properties for the sintered ones and also determining their optimum levels.

Item Type: Conference or Workshop Item (Full Paper)
Additional Information: 3129/1882
Uncontrolled Keywords: Powder metallurgy (PM), Green compact, Cu-TaC, Thermal conductivity, Electrical conductivity; Density; EDM
Subjects: T Technology > TS Manufactures > TS200 Metal manufactures. Metalworking
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Prof. Dr. Ahsan Ali Khan
Date Deposited: 09 Sep 2011 11:50
Last Modified: 17 Oct 2011 15:43
URI: http://irep.iium.edu.my/id/eprint/1882

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