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Characteristics of Micro EDM using Wire Electrical Discharge Grinding for Al2O3/CNTs Hybrid Materials
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HOME > J Korean Powder Metall Inst > Volume 17(4); 2010 > Article
Al2O3/CNTs 하이브리드소재의 와이어 방전연삭을 이용한 마이크로 방전가공 특성
탁현석, 김종훈, 임한석, 이춘태, 정영근, 강명창
Characteristics of Micro EDM using Wire Electrical Discharge Grinding for Al2O3/CNTs Hybrid Materials
Hyun-Seok Tak, Jong-Hun Kim, Han-Suk Lim, Choon-Tae Lee, Young-Keun Jeong, Myung-Chang Kang
Journal of Korean Powder Metallurgy Institute 2010;17(4):319-325
DOI: https://doi.org/10.4150/KPMI.2010.17.4.319
1부산대학교 하이브리드소재 솔루션 국가핵심연구센터(NCRC)
2부산대학교 하이브리드소재 솔루션 국가핵심연구센터(NCRC)
3하이브리드 정밀회사
4신라대학교 자동차기계공학과
5부산대학교 하이브리드소재 솔루션 국가핵심연구센터(NCRC)
6부산대학교 하이브리드소재 솔루션 국가핵심연구센터(NCRC)
1National Core Research Center for Hybrid Materials Solution, Pusan National University
2National Core Research Center for Hybrid Materials Solution, Pusan National University
3Hybrid Precision Co., Business Incubator Center
4Department of Automotive & Mechanical Engineering, Silla University
5National Core Research Center for Hybrid Materials Solution, Pusan National University
6National Core Research Center for Hybrid Materials Solution, Pusan National University
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Electrical discharge machining (EDM) is an attractive machining technique but it requires electrically conductive ceramic materials. In this study, Alumina matrix composites reinforced with CNTs were fabricated through CNT purification, mixing, compaction and spark plasma sintering (SPS) processes. Al_2O_3 nanocomposites with the different CNT concentrations were synthesized. The mechanical and electrical characteristics of Al_2O_3/CNTs composites were examined in order to apply the materials to the EDM process. In addition, micro-EDM using wire electrical discharge grinding (WEDG) was conducted under the various EDM parameters to investigate the machining characteristics of machined hole by Field Emission Scanning Electron Microscope (FE-SEM). The results show that Al_2O_3/CNTs 10%Vol. was more suitable than the other materials because high conductivity and large discharge energy caused violent sparks resulting in bad machining accuracy and surface quality.

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