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논문 기본 정보

자료유형
학술대회자료
저자정보
R. Arvind Singh (한국과학기술연구원) Eui-Sung Yoon (한국과학기술연구원) Hung-Gu Han (한국과학기술연구원) Hosung Kong (한국과학기술연구원)
저널정보
한국트라이볼로지학회 한국트라이볼로지학회 학술대회 한국윤활학회 2005년도 제40회 춘계학술대회 및 자동차 트라이볼로지 국제심포지움
발행연도
2005.6
수록면
49 - 55 (7page)

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The micro-friction behaviour of Si-wafer and diamond-like carbon (DLC) and dimethyldichlorosilane (DMDC) self-assembled monolayer (SAM) coated on Si-wafer was studied. Friction at micro-scale was measured using a ball-an-flat type reciprocating micro-tribe tester. Glass (Soda Lime) balls with various radii namely 0.25 ㎜, 0.5 ㎜ and 1 ㎜ were used. Experiments were conducted at applied normal loads of 1500 μN, 3000 μN and 4800 μN. All tests were conducted at controlled conditions of temperature of 24±1 °C and relative humidity of 45±5 %. Results showed that the friction increased with the applied normal load in the case of all the three test materials. It was also observed that friction was affected by the ball size. Friction increased with the ball size in the case of silicon wafer. The DMDC SAM showed a similar trend, and lower values of friction than those of silicon wafer. Interestingly, for DLC it was observed that friction decreased with the ball size. This distinct difference in the behavior of friction in DLC was attributed to the difference in the operating mechanism. Evidences of the operating mechanisms were obtained using a scanning electron microscope (SEM). The evidences showed that silicon wafer and DLC exhibited wear, whereas wear was absent in DMDC SAM. Observations showed that solid-solid adhesion was dominant in silicon wafer, while DLC showed plowing. Further, the wear in these two materials significantly influenced their friction. The effect of applied normal load and the ball size on friction in the test materials has been discussed in terms of the contact area.

목차

Abstract
1. Introduction
2. Experimental
3. Results and Discussion
4. Conclusions
Acknowledgements
References

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