Friction behavior of a multi-interface system and improved performance by AlMgB₁₄–TiB₂–C and diamond-like-carbon coatings

Journal Article · Tue Mar 29 04:00:00 UTC 2016 · Tribology International

DOI: https://doi.org/10.1016/j.triboint.2016.03.022 · OSTI ID:1247924

Qu, Jun ^[1]; Blau, Peter J. ^[1]; Higdon, Clifton ^[2]; Cook, Bruce A. ^[3]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
2. Quality at Bluewater Thermal Solutions (United States)
3. Ames Lab., Ames, IA (United States)

We investigated friction behavior of a bearing system with two interfaces involved: a roller component experiencing rolling–sliding interaction against twin cylinders under point contacts while simultaneously undergoing pure sliding interaction against a socket under a conformal contact. Lubrication modeling predicted a strong correlation between the roller's rolling condition and the system's friction behavior. Experimental observations first validated the analytical predictions using steel and iron components. Diamond-like-carbon (DLC) coating and AlMgB₁₄–TiB₂ coating with a carbon topcoat (BAMC) were then applied to the roller and twin cylinders, respectively. In conclusion, testing and analysis results suggest that the coatings effectively decreased the slip ratio for the roller–cylinder contact and the sliding friction at both bearing interfaces and, as a result, significantly reduced the system frictional torque.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1247924
• Journal Information: Tribology International, Journal Name: Tribology International Journal Issue: C Vol. 99; ISSN 0301-679X
• Publisher: ElsevierCopyright Statement
• Country of Publication: United States
• Language: English