Investigation of surface roughness in micro-EDM of nonconductive ZrO2 ceramic with powder mixed dielectric fluid
This paper investigates the average surface roughness (Ra) in micro-electrical discharge machining of electrically nonconductive zirconium oxide (ZrO2) ceramic using powder mixed dielectric. The gap voltage and concentration of tantalum carbide (TaC) powder are considered as the variable paramete...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Trans Tech Publications, Switzerland
2015
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/43929/ http://irep.iium.edu.my/43929/ http://irep.iium.edu.my/43929/ http://irep.iium.edu.my/43929/1/2015_AMR_1115_16-19_Sbr.pdf |
| Summary: | This paper investigates the average surface roughness (Ra) in micro-electrical discharge
machining of electrically nonconductive zirconium oxide (ZrO2) ceramic using powder mixed
dielectric. The gap voltage and concentration of tantalum carbide (TaC) powder are considered as the
variable parameters for the investigation while other conditions are kept constant. Response surface
methodology is used for design of experiments and to analyze the results for a better surface finish.
The study shows that both the gap voltage and powder concentration have a significant effect on the
average surface roughness of ZrO2. However, voltage has the higher effect than powder concentration
on the surface integrity. The optimized values of gap voltage and powder concentration are found to
be 94.39 V and 6.28g/l respectively for a minimum surface roughness in micro-EDM of ZrO2. |
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