• Proceedings of the Materials Research Society of Korea Conference
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• 1994.11a
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• pp.105-105
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• 1994

• 기계와재료
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• v.8 no.4 s.30
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• pp.129-137
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• 1996

• 기계와재료
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• v.18 no.3 s.69
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• pp.108-117
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• 2006

• Proceedings of the Korean Society For Composite Materials Conference
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• 1999.04a
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• pp.48-52
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• 1999

• Proceedings of the Korean Society For Composite Materials Conference
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• 1999.04a
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• pp.226-229
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• 1999

• Resources Recycling
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• v.10 no.6
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• pp.3-8
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• 2001

This study was examed about leaching behavior in order to separate plasticizer selectively before dechlorination from flexible PVC material in alkali solutions at $80~120^{\circ}C$. The dechlorination of that was not almost occurred below $100^{\circ}C$. But the yield of elution of plasticizer was 100% above 5M NaOH. Therefore, by controlling alkali concentration and reaction temperature, it is possible to extract the plasticizer selectively without taking dechlorination.

• Proceedings of the Membrane Society of Korea Conference
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• 1992.04a
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• pp.29-32
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• 1992

무기물질로 제조된 분리막은 대부분의 유기고분자 분리막에 비하여 열에 강하고, 구조의 안정성이 있으며, 유독 물질 및 미생물등에 영향을 덜받는다는 장점이 있어 폐수 처리, 식품 가공 및 생물 공학적 분리 목적으로 많은 연구가 진행되어 왔다. 최근 재료기술의 발달로 양질의 세라믹 분리막이 제조 가능하게 되었으며 다공성 alumina, zirconia, glass 분리막은 현재 4 nm - 5$\mu$m의 기공 범위로 상용화 되어 있다.

• Membrane Journal
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• v.3 no.1
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• pp.12-21
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• 1993

세라믹 분리막은 알루미나($Al_2O_3$), 지르코니아($ZrO_2$), Carbon, 실리콘 카바이드, 스테인레스 등의 무기재료를 이용하여 제조된 분리막이다. 압출성형공정으로 제조된 지지체는 1700$^{\circ}C$ 이상의 소결공정을 거치므로 지지체 상단에 슬러리 코팅공정으로 형성된 얇은 막에게 안정된 분리기능을 수행할 수 있도록 커다란 물리적 강도를 제공한다. 따라서, 세라믹 분리막은 다공성 세라믹 구조를 갖는 특징적인 두 개 또는 세 개의 균일한 층으로 구성된 복합막이라 할 수 있다.

• Proceedings of the Korean Society For Composite Materials Conference
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• 2003.04a
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• pp.113-116
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• 2003

The investigation of delamination growth behavior in hybrid composite material such as FRMLs should be considered delamination growth rate, dA_D/da$ using the delamination shape factor, $f_S$ instead of traditional fracture mechanics parameters. The main objective of this study is to evaluate the relationship between delamination element (i. e. delamination width, b, delamination contour, c, delamination shape factor, $f_S$ and delamination growth rate, dA_D/da$) and delamination growth in FRMLs under cyclic bending moment. The delamination shape formed along the fatigue crack between aluminum layer and glass fiber/epoxy layer are measured by scanning method. The details of study are as follow : ⅰ) Relationship between crack length, a and delamination width, b. ⅱ) Variation of delamination growth rate, dA_D/da$ was attendant on delamination shape factors, $f_{S1}$, $f_{S2}$, $f_{S3}$. The test result indicated the delamination growth behavior depends in delamination element such as delamination width, b, delamination shape factors, $f_{S1}$, $f_{S2}$, $f_{S3}$.

• Korean Journal of Materials Research
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• v.8 no.8
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• pp.685-692
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• 1998

Since a wet-seal area of Molten Carbonate Fuel Cell (MCFC) operated at $650^{\circ}C$ is exposed to severe environment, a life-time of MCFC is influenced by the corrosion resistance of separator. In order to improve corrosion resistance of 316L stainless steel used as separator material, AI- base alloy such as NiAI has been widely used as coat¬ing material on the wet-seal area. The purpose of this work is to develope a more protective coating material by adding yttrium on NiAI alloy. An immersion test and a polarization test were performed in molten carbonate salt at $650^{\circ}C$ to estimate corrosion resistance of the NiAI alloy and the NiAl/Y alloys with up to L5at% yttrium. NiAl/Y alloys showed better corrosion resistance than NiAI alloy. We found that more than 0.7 at% yttrium was required to improve the corrosion resistance of NiAI alloy in molten carbonate salt at $650^{\circ}C$.