Pham, Duc-Cuong Ahn, Hyo-Sok Oh, Jae-Eung Yoon, Eui-Sung 2024-01-21T01:00:38Z 2024-01-21T01:00:38Z 2021-08-31 2007-07 1738-494X https://pubs.kist.re.kr/handle/201004/134305 This study concerns the effects of tribochemical interactions at the interface of Si-DLC (silicon-doped diamond-like carbon) film and steel ball in sliding contact on tribological properties of the film. The Si-DLC film was over-coated on Pure DLC coating by radio frequency plasma-assisted chemical vapor deposition (r.f. PACVD) with different Si concentration. Friction tests against steel ball using a reciprocating type tribotester were performed in ambient environment. X-Ray photoelectron spectroscopy (XPS) and auger electron spectroscopy (AES) were used to study the chemical characteristics and elemental composition of the films and mating balls after tests. Results showed a dark-gray film consisting of carbon, oxygen and silicon on the worn steel ball surface with different thickness. On the contrary, Such film was not observed on the Surface of the ball slid against pure DLC coating. The oxidation of Si-DLC surface and steel ball was also found at particular regions of contact area. This demonstrates that tribochemical interactions occurred at the contact area of Si-DLC and steel ball during sliding to form a tribofilm (so called transfer film) on the ball specimen. While the pure DLC coating exhibited high coefficient of friction (similar to 0.06), the Si-DLC film showed a significant lower coefficient of friction (similar to 0.022) with the presence of tribofilm on mating ball surface. However, the Si-DLC film possesses a very high wear rate in comparison with the pure DLC. It was found that the tribochemical interactions strongly affected tribological properties of the Si-DLC film in sliding against steel. English KOREAN SOC MECHANICAL ENGINEERS TRIBOLOGICAL BEHAVIOR MECHANICAL-PROPERTIES CARBON Tribochemical interactions of Si-doped DLC film against steel in sliding contact Article 10.1007/BF03027658 1 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.21, no.7, pp.1083 - 1089 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY 21 7 1083 1089 scie scopus kci ART001059691 000247940100011 2-s2.0-34547160773 Engineering, Mechanical Engineering Article TRIBOLOGICAL BEHAVIOR MECHANICAL-PROPERTIES CARBON friction wear DLC Si-DLC tribochemical interactions tribofilm