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유기변성 하이브리드 세라믹 물질을 결합제로 이용한 고체피막윤활제의 마찰마모 특성
한흥구(Hung-Gu Han),공호성(Hosung Kong),윤의성(Eui-Sung Yoon) 한국트라이볼로지학회 2003 한국트라이볼로지학회 학술대회 Vol.36 No.-
In order to enhance the thermal stability of binder materials of bonded type solid lubricants, several metal-alkoxide based sol-gel materials such as methy ltrimethoxysilane(MTMOS), titaniumisopropoxide(Ti(Opr<SUP>i</SUP>)₄), zirconiumisopropoxide (Zr(Opr<SUP>j</SUP>)₄) and aluminumbutoxide(Al(Obu<SUP>t</SUP>)₄) were modified chemically by both epoxy and acrylic silane compounds. Friction and wear characteristics of the bonded solid lubricants, whose binders were of several hybrid ceramic materials, were tested with a reciprocating tribo-tester. Wear life was evaluated with respect to the heat-curing temperature, friction temperature, type of supplement lubricants, and ratio of binder materials. Test results showed that the Si-Zr hybrid ceramic materials modified by epoxy-silane compounds had a higher wear life compared to others. Sb₂O₃ was the most effective supplement lubricants in the high temperature, and XPS analyses revealed that it was caused mainly by a strong anti-oxidation effect to MoS₂ particles. The higher heat-curing temperature resulted in the higher wear life, and the higher friction temperature resulted in the lower wear life.
졸-겔 공정에 의한 유기변성 하이브리드 세라믹 물질의 미세 마찰마모 특성
한흥구(Hung-Gu Han),공호성(Hosung Kong),윤의성(Eui-Sung Yoon),양승호(Seung-Ho Yang) 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.35 No.-
In order to enhance the thermal stability of binder materials of bonded type solid lubricants, several combinations of metal-alkoxide based sol-gel materials such as methyltrimethoxysilane(MTMOS), titaniumisopropoxide(Ti(Opr<SUP>i</SUP>)₄), zirconiumisopropoxide(Zr(Obu<SUP>i</SUP>)₄) and aluminumbutoxide(Al(Obu<SUP>t</SUP>)₄) were chemically modified by epoxy-, acrylic- and fluoro-silane compounds, respectively, in this work. Friction and wear characteristics of these hybrid ceramic materials were tested with a micro tribo-tester where a reciprocating steel ball slid on a test material, and the tribological property was also evaluated with respect to both heat-curing temperature and the time. Test results generally showed that hybrid ceramic materials modified by epoxy-silane compounds had a low friction compared to others. And the higher heat-curing temperature and the longer heat treatment time resulted in the higher friction and the lower wear. IR spectroscopic analyses revealed that it was caused mainly by the increased metal oxide content in hybrid ceramics when the heat-curing temperature was over 320℃.