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http://dx.doi.org/10.9725/kstle.2013.29.6.366

A Study on Wear Mechanism in Diamond-like Carbon Coated Surface by Finite Element Analysis  

Lee, Jun-Hyuk (Graduate School, School of Mechanical & Aerospace Engineering, Gyeongsang National University)
Park, Tae-Jo (School of Mechanical Engineering, ERI, Gyeongsang National University)
Publication Information
Tribology and Lubricants / v.29, no.6, 2013 , pp. 366-371 More about this Journal
Abstract
Various heat treatment and surface coating methods have been applied to machine parts. Nowadays, diamond-like carbon (DLC) coatings are widely used because of their excellent tribological characteristics. Despite the numerous studies on DLC-coated engineering surfaces, the exact wear mechanisms related to the coating thickness and elastic modulus have not been fully examined. In this study, a sliding contact problem between a small spherical hard particle and a DLC-coated steel surface is analyzed using a nonlinear finite element code, MARC. The maximum principal stress distributions and deformed surfaces are compared for different coating thicknesses and Young's modulus values. Plastically deformed surface shapes such as a groove and torus indicate that the most dominant wear mechanism for a DLC-coated surface is abrasive wear. Fatigue wear can also play a role in a case where the coating thickness is relatively large and the elastic modulus is high.
Keywords
DLC (Diamond-like carbon); coating; contact analysis; abrasive wear; fatigue wear;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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