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염소가스 반응시간에 따른 TiC표면 탄소막의 Tribology특성
임대순,배흥택,나병철,정지훈 한국트라이볼로지학회 2009 한국윤활학회지(윤활학회지) Vol.25 No.1
TiC-derived carbon coatings have been synthesized at 600oC temperature treatment with H2/Cl2 mixture gases. From Raman spectroscopy measurements, the modified layer was covered with carbon and the thickness of the layer was increased with increasing reaction time. And ID/IG ratio was decreased with increasing reaction time. The superior tribological property was obtained from TiC reacted with Cl2 gas for 2 hrs. And the tribological property measurements indicate that TiC-derived carbon layer has 0.9×10−6mm3/Nm in wear coefficient and 0.13 in friction coefficient.
Synthesis and characterization of alumina/carbon nanotube composite powders
임대순,Jeong-WookAn 한양대학교 세라믹연구소 2002 Journal of Ceramic Processing Research Vol.3 No.3
Synthesis and characterization of alumina/carbon nanotube (CNT) composite powders have been investigated for production of nanotube reinforced ceramic composites. The alumina/CNT powder was prepared by catalytic decomposition of acetylene gas with iron supported on alumina. The catalyst source was iron nitrate and the iron content was controlled up to 5.0 mol % to change the CNT compositions in the composite powders. The nanotube content in the powders was determined by an elemental analyzer. The quantity and quality of the CNT in the powders have been investigated with SEM, TEM, XRD and BET. The content of CNT was increased up to 12.5 wt. % and the CNT diameter increased with increasing iron catalyst content. The surface area and carbon content analysis shows that the quality of CNT is highest at 1.0 mol % iron catalyst loading. The synthesized CNT was fairly well-dispersed in the alumina powder.