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http://dx.doi.org/10.4150/KPMI.2018.25.1.30

A Study on the Wear Properties of Cu-free Ecofriendly Vehicle Brake Pad  

Kim, Ki-Bong (Powder Technology Department, Korea Institute of Materials Science (KIMS))
Yang, Sangsun (Powder Technology Department, Korea Institute of Materials Science (KIMS))
Lee, Seong-Ju (Research Center, KB Autosys Co., Ltd.)
Hwang, Suk-Hun (Research Center, KB Autosys Co., Ltd.)
Kim, Sin-Wook (Research Center, KB Autosys Co., Ltd.)
Kim, Yong-Jin (Powder Technology Department, Korea Institute of Materials Science (KIMS))
Publication Information
Journal of Powder Materials / v.25, no.1, 2018 , pp. 30-35 More about this Journal
Abstract
The friction characteristics of Al-Fe alloy powders are investigated in order to develop an eco-friendly friction material to replace Cu fiber, a constituent of brake-pad friction materials. Irregularly shaped Al-Fe alloy powders, prepared by gas atomization, are more uniformly dispersed than conventional Cu fiber on the brake pad matrix. The wear rate of the friction material using Al-8Fe alloy powder is lower than that of the Cu fiber material. The change in friction coefficient according to the friction lap times is 7.2% for the Cu fiber, but within 3.8% for the Al-Fe alloy material, which also shows excellent judder characteristics. The Al-Fe alloy powders are uniformly distributed in the brake pad matrix and oxide films of Al and Fe are homogeneously formed at the friction interface between the disc and pad, thus exhibiting excellent friction and lubrication characteristics. The brake pad containing Al-Fe powders avoids contamination by Cu dust, which is generated during braking, by replacing the Cu fiber while maintaining the friction and lubrication performance.
Keywords
Brake pad; Cu fiber; Al powder; Friction; Oxide film;
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