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http://dx.doi.org/10.9725/kstle.2016.32.4.125

Tribology Coating Study of Thick DLC (ta-C) Film  

Jang, Young-Jun (Surface Engineering Department, Implementation Research Division, Korea Institute of Materials Science (KIMS))
Kang, Yong-Jin (Surface Engineering Department, Implementation Research Division, Korea Institute of Materials Science (KIMS))
Kim, Gi Taek (Surface Engineering Department, Implementation Research Division, Korea Institute of Materials Science (KIMS))
Kim, Jongkuk (Surface Engineering Department, Implementation Research Division, Korea Institute of Materials Science (KIMS))
Publication Information
Tribology and Lubricants / v.32, no.4, 2016 , pp. 125-131 More about this Journal
Abstract
In recent years, thick ta-C coating has attracted considerable interest owing to its existing and potential commercial importance in applications such as automobile accessories, drills, and gears. The thickness of the ta-C coating is an important parameter in these applications. However, the biggest problems are achieving efficient coating and uniformity over a large area with high-speed deposition. Feasibility is confirmed for the ta-C coating thickness of up to 9.0 µm (coating speed: 3.0 µm/h, fixed substrate) using a single FCVA cathode. The thickness was determined using multiple coating cycles that were controlled using substrate temperature and residual stresses. In the present research, we have designed a coating system using FCVA plasma and produced enhanced thick ta-C coating. The system uses a specialized magnetic field configuration with stabilized DC arc plasma discharge during deposition. To achieve quality that is acceptable for use in automobile accessories, the magnetic field, T-type filters, and 10 pieces of a multi-cathode are used to demonstrate the deposition of the thick ta-C coating. The results of coating performance indicate that uniformity is ±7.6 , deposited area is 400 mm, and the thickness of the ta-C coating is up to 5.0 µm (coating speed: 0.3 µm/h, revolution and rotation). The hardness of the coating ranges from 30 to 59 GPa, and the adhesion strength level (HF1) ranges from 20 to 60 N, depending on the ta-C coating.
Keywords
Tribology coating; DLC; Filtered Cathode Vacuum Arc; Thick coating; Large area deposition;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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