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Influence of nano powder mixed dielectric fluid on surface finish in micro electro discharge machining of zirconia

Ali, Mohammad Yeakub and Sabur, Abdus and Maleque, Md. Abdul (2017) Influence of nano powder mixed dielectric fluid on surface finish in micro electro discharge machining of zirconia. Current Nanomaterials, 2 (2). pp. 90-94. ISSN 2405-4623

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Background: Powder mixed dielectric fluid is being used recently to cut difficult to cut ceramic materials such as aluminium oxide (Al2O3) and zirconium oxide (ZrO2) where process development and optimization are found to be critical issues. Object: This paper investigates and compares the average surface roughness (Ra) in micro electrical discharge machining (EDM) of electrically nonconductive zirconium oxide (ZrO2) ceramic using clean and tantalum carbide (TaC) nano powder mixed kerosene dielectric fluid. Method: The design of experiment was applied by response surface methodology with face centred composite design. The gap voltage, capacitance and concentration of TaC powder are considered as the variable parameters for the investigation while other conditions are kept constant. Results: The study shows that the powder concentration has a significant negative effect on the average surface roughness of ZrO2. Conclusion: The optimized values of gap voltage and powder concentration are found to be 100 pF, 94.4 V and 6.3 g/l, respectively for a minimum surface roughness in micro-EDM of ZrO2. Without powder introduction, a minimum Ra surface roughness of 170 nm achieves 100 pF and 81 V.

Item Type: Article (Journal)
Additional Information: 4751/67974
Uncontrolled Keywords: Micro-electro discharge machining, surface finish, nanometric surface roughness, nano powder concentration, dielectric fluid, gap voltage.
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
T Technology > TN Mining engineering. Metallurgy
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
Kulliyyah of Engineering
Depositing User: Prof. Ir. Dr. Mohammad Yeakub Ali
Date Deposited: 05 Dec 2018 16:22
Last Modified: 05 Dec 2018 16:22
URI: http://irep.iium.edu.my/id/eprint/67974

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