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자동차 부품 응용을 위한 탄소막으로 표면 개질된 탄화규소의 Tribology 특성평가
최현주(Hyun-Ju Choi),임대순(Dea-Soon Lim),나병철(Byung Chul Na),이전국(Jeon-Kook Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
CDC (Carbide Derived Carbon) coatings produced with chlorine and hydrogen ratio of about 2:1 had high hardness and Young's modulus. Commercial SiC balls were exposed to Ar-Cl₂ and Ar-Cl₂H₂ gas mixtures at temperatures of 800-1200℃. As was predicted, the interaction of silicon carbide with Ar-5% Cl₂-2.5% H₂ gas at high temperatures resulted in the formation of carbon (CDC). EDX results of the coated SiC ball surface showed a considerable atomic % increase (almost 99%) of the carbon phase and CDC formation up to 15 ㎛ in thickness. Compared to the uncoated SiC samples, samples with CDC structure had a relatively lower friction coefficient, which was greatly reduced to about 0.1~0.2, and better wear resistance in air condition. This is because the carbon yield was increased with temperature. This result agrees with Raman spectra analysis results and other studies of the coatings which show mixed sp²-sp³ bonding.
XPS 분석을 통한 CrMoN 코팅의 마찰마모 거동 연구
양영환 ( Young Hwan Yang ),여인웅 ( In Woong Lyo ),박상진 ( Sang Jin Park ),임대순 ( Dea Soon Lim ),오윤석 ( Yoon Suk Oh ) 대한금속재료학회 ( 구 대한금속학회 ) 2012 대한금속·재료학회지 Vol.50 No.8
The tribological behavior of CrMoN films with respect to surface chemistry was investigated by using X-ray photoelectron spectroscopy (XPS). All of the films were prepared from a hybrid PVD system consisting of DC unbalanced magnetron (UBM) sputtering and arc ion plating (AIP) sources. The tribological property of the films was evaluated by a friction coefficient using a Ball-on-disk type tribometer. The chemistry of wear track was analyzed by energy dispersive spectroscopy (EDS) and XPS. The friction coefficient was measured to be 0.4 for the CrMoN film, which is lower than that of a monolithic CrN film. EDS and XPS results imply the formation of an oxide layer on the coating surface, which was identified as molybdenum oxide phases, known to be a solid lubricant during the wear test.