• Title/Summary/Keyword: Kim Su-On

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Precision assessment of micro abrasive jet machining result on glass by using thick SU-8 as a mask (SU-8 마스크를 이용한 유리의 입자분사 미세가공 정밀도 평가)

  • Saragih A.S.;Ko T.J.;Kim H.S.;Park Y.W.;Lee I.H.
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2006.05a
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    • pp.493-494
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    • 2006

  • SU-8 can be implemented as a mask for micro Abrasive Jet Machining (micro-AJM) process [1]. In this paper, we will evaluate the quality of micro grooving result on glass substrate by micro-AJM process which using SU-8 as a mask. It was evaluated on width and edge profile of the micro grooving. The result was having distortion compare with the master film used to pattern the SU-8 mask. The value of distortion with other properties which came along with it, such as depth and surface roughness, can be optimized in order to fabricate micro-channel for micro-fluidic application.

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ANTICORROSION PROPERTIES OF SIOC COATED SUS-316

  • Kim, Su-Ryong;Gwon, U-Taek;Kim, Jeong-Ju;Kim, Jong-Il;Kim, Yeong-Hui;Kim, Jeong-Il;U, Chang-Hyeon
    • Proceedings of the Materials Research Society of Korea Conference
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    • 2009.11a
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    • pp.34.2-34.2
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    • 2009

  • The ceramic coatings on metallic materials have attracted by many researchers due to the chemical inertness of ceramic materials. In such aspect, SiOC is a promising material tobe used as protective coating layer on metallic materials due to its outstanding thermal stability and chemical inertness. In this research, SiOC coating was carried out onto SuS-316 substrate using Cl free preceramic polymers such aspolyphenylcarbosilane. 20% of polymethylphenylsilane in cyclohexane solution was coated onto metal surface by dip coating method. Thermal oxidation was carried out at $200^{\circ}C$ for crosslink of the preceramic polymer and the sample was pyrolysized at $800^{\circ}C$ under argon to convert the preceramic polymer to amorphous SiOCx state. The microstructure of the SiOCx film after pyrolysis was investigated using FE-SEM. Corrosion resistance of SiOC coated SuS-316 substrate has been investigated using 5% HCl solution at 25, 40, 60 and $80^{\circ}C$ for 7days. The data revealed that the corrosion resistance increased with SiOC coating on SuS-316 substrate.

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