FABRICATION OF POROUSTi- ANDW-COMPACTS BY ELECTRO-DISCHARGE-SINTERING PROCESS

Gi-An Song, Ji-Seon Shin, Tae-Ju Kang, Han Shin Choi, Jin Kyu Lee, Min Ha Lee, Taek Soo Kim, Won Hee Lee and Ki Buem Kim ()
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Gi-An Song: Department of Advanced Materials Engineering, Sejong University, Gwangjin-gu, Gunja-dong, 143-747 Seoul, South Korea
Ji-Seon Shin: Department of Advanced Materials Engineering, Sejong University, Gwangjin-gu, Gunja-dong, 143-747 Seoul, South Korea
Tae-Ju Kang: Department of Advanced Materials Engineering, Sejong University, Gwangjin-gu, Gunja-dong, 143-747 Seoul, South Korea
Han Shin Choi: Advanced Materials Division, Korea Institute of Industrial Technology (KITECH), Dongchon-dong, Yeonsu-gu, 463-130 Incheon, South Korea
Jin Kyu Lee: Advanced Materials Division, Korea Institute of Industrial Technology (KITECH), Dongchon-dong, Yeonsu-gu, 463-130 Incheon, South Korea
Min Ha Lee: Advanced Materials Division, Korea Institute of Industrial Technology (KITECH), Dongchon-dong, Yeonsu-gu, 463-130 Incheon, South Korea
Taek Soo Kim: Advanced Materials Division, Korea Institute of Industrial Technology (KITECH), Dongchon-dong, Yeonsu-gu, 463-130 Incheon, South Korea
Won Hee Lee: Department of Advanced Materials Engineering, Sejong University, Gwangjin-gu, Gunja-dong, 143-747 Seoul, South Korea
Ki Buem Kim: Department of Advanced Materials Engineering, Sejong University, Gwangjin-gu, Gunja-dong, 143-747 Seoul, South Korea

Surface Review and Letters (SRL), 2010, vol. 17, issue 02, 245-250

Abstract: A single pulse of 0.57–1.1 kJ/0.3 g-sphericalTi-powder in size range of 30–70 μm, using a constant 450 μF capacitor, was applied to produce fully porousTi- andW-compacts by electro-discharge sintering. Microstructure examination and hardness measurement of the porousTi-compacts revealed that more stable necks formed with increasing electrical input energy up to 1.1 kJ. On the contrary,W-compacts using rectangularW-powders in size range of 5–15 μm are composed of solid region with micropore and porous layer with weak particle bonding indicating heterogeneous structure. These results suggest that the powder morphology plays a crucial role to control the porous microstructure.

Keywords: Metals; microporous materials; microstructure (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1142/S0218625X10014004

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