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http://dx.doi.org/10.9725/kts.2020.36.4.207

Effects of Copper and Copper-Alloy on Friction and Wear Characteristics of Low-Steel Friction Material  

Jung, Kwangki (Graduate School, Dept. of Material Science and Engineering, Kumoh National Institute of Technology)
Lee, Sang Woo (Dept. of Material Science and Engineering, Kumoh National Institute of Technology)
Kwon, Sungwook (R&D Center, Sangsin Brake Co., Ltd.)
Choi, Sungwoo (R&D Center, Sangsin Brake Co., Ltd.)
Lee, Heeok (R&D Center, Sangsin Brake Co., Ltd.)
Publication Information
Tribology and Lubricants / v.36, no.4, 2020 , pp. 207-214 More about this Journal
Abstract
In this study, we investigated the effects of copper and copper-alloy on the frictional and wear properties of low-steel friction material. The proportions of copper and copper-alloy in the brake friction materials used in passenger cars are very high (approximately 5-20% weight), and these materials have significant effects on friction and wear characteristics. In this study, the effects of cupric ingredients, such as the copper fiber and brass fiber, are investigated using the friction materials based on commercial formulations. After the copper and brass fibers from the same formulation were removed, the frictional and wear characteristics were evaluated to determine the influence of the copper and copper-alloy. We evaluated the frictional and wear characteristics by simulating various braking conditions using a 1/5 scale dynamometer. The results show that the friction material containing copper and brass fibers have excellent frictional stability and a low wear rate compared to the friction material that does not contain copper and brass fibers. These results are attributed to the excellent ductility, moderate melting point, high strength, and excellent thermal conductivity of copper and copper-alloy. We analyzed the surfaces of the friction materials before and after the performing the friction tests using a scanning electron microscope-energy dispersive X-ray spectroscope, confocal microscope, and roughness tester to verify the frictional behavior of copper and copper-alloy. In future studies, it will be applied to the development of copper-free friction materials based on the results of this study.
Keywords
1/5 scale dynamometer; copper-free; friction material; friction test; low-steel friction material; transfer film;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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