抄録
Material migration between tool electrode and workpiece material in micro electrical discharge machining of reaction-bonded silicon carbide was experimentally investigated. The microstructural changes of workpiece and tungsten tool electrode were examined using scanning electron microscopy, cross sectional transmission electron microscopy and energy dispersive X-ray under various voltage, capacitance and carbon nanofibre concentration in the dielectric fluid. Results show that tungsten is deposited intensively inside the discharge-induced craters on the RB-SiC surface as amorphous structure forming micro particles, and on flat surface region as a thin interdiffusion layer of poly-crystalline structure. Deposition of carbon element on tool electrode was detected, indicating possible material migration to the tool electrode from workpiece material, carbon nanofibres and dielectric oil. Material deposition rate was found to be strongly affected by workpiece surface roughness, voltage and capacitance of the electrical discharge circuit. Carbon nanofibre addition in the dielectric at a suitable concentration significantly reduced the material deposition rate.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 731-743 |
| ページ数 | 13 |
| ジャーナル | Applied Surface Science |
| 巻 | 276 |
| DOI | |
| 出版物ステータス | Published - 2013 7 1 |
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ASJC Scopus subject areas
- Surfaces, Coatings and Films
これを引用
Experimental investigation on material migration phenomena in micro-EDM of reaction-bonded silicon carbide. / Liew, Pay Jun; Yan, Jiwang; Kuriyagawa, Tsunemoto.
：: Applied Surface Science, 巻 276, 01.07.2013, p. 731-743.研究成果: Article
}
TY - JOUR
T1 - Experimental investigation on material migration phenomena in micro-EDM of reaction-bonded silicon carbide
AU - Liew, Pay Jun
AU - Yan, Jiwang
AU - Kuriyagawa, Tsunemoto
PY - 2013/7/1
Y1 - 2013/7/1
N2 - Material migration between tool electrode and workpiece material in micro electrical discharge machining of reaction-bonded silicon carbide was experimentally investigated. The microstructural changes of workpiece and tungsten tool electrode were examined using scanning electron microscopy, cross sectional transmission electron microscopy and energy dispersive X-ray under various voltage, capacitance and carbon nanofibre concentration in the dielectric fluid. Results show that tungsten is deposited intensively inside the discharge-induced craters on the RB-SiC surface as amorphous structure forming micro particles, and on flat surface region as a thin interdiffusion layer of poly-crystalline structure. Deposition of carbon element on tool electrode was detected, indicating possible material migration to the tool electrode from workpiece material, carbon nanofibres and dielectric oil. Material deposition rate was found to be strongly affected by workpiece surface roughness, voltage and capacitance of the electrical discharge circuit. Carbon nanofibre addition in the dielectric at a suitable concentration significantly reduced the material deposition rate.
AB - Material migration between tool electrode and workpiece material in micro electrical discharge machining of reaction-bonded silicon carbide was experimentally investigated. The microstructural changes of workpiece and tungsten tool electrode were examined using scanning electron microscopy, cross sectional transmission electron microscopy and energy dispersive X-ray under various voltage, capacitance and carbon nanofibre concentration in the dielectric fluid. Results show that tungsten is deposited intensively inside the discharge-induced craters on the RB-SiC surface as amorphous structure forming micro particles, and on flat surface region as a thin interdiffusion layer of poly-crystalline structure. Deposition of carbon element on tool electrode was detected, indicating possible material migration to the tool electrode from workpiece material, carbon nanofibres and dielectric oil. Material deposition rate was found to be strongly affected by workpiece surface roughness, voltage and capacitance of the electrical discharge circuit. Carbon nanofibre addition in the dielectric at a suitable concentration significantly reduced the material deposition rate.
KW - Carbon nanofibre
KW - Material deposition
KW - Material migration
KW - Micro electro discharge machining
KW - Reaction-bonded silicon carbide
KW - Tungsten particle
UR - http://www.scopus.com/inward/record.url?scp=84877586255&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84877586255&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2013.03.161
DO - 10.1016/j.apsusc.2013.03.161
M3 - Article
AN - SCOPUS:84877586255
VL - 276
SP - 731
EP - 743
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -