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Third Body Formation on Brake Pads and Rotors
Technical Paper
2004-01-2767
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The Focused Ion Beam (FIB) technique combined with Transmission Electron Microscopy (TEM) was used here for the first time to reveal the microstructure of thin surface layers on brake pads and rotors after a run-in period during which a stable coefficient of friction had developed. Generally the outermost layers of both, pad and rotor, comprise a complicated structure of nanocrystalline metal and metal oxide particles embedded in an amorphous matrix. Obviously oxidation plays a major role and the third body seems to behave like a granular medium. The contact areas were no protuberant plateaus in the regarded case. Therefore the flow of the granular third body layer seems to control friction force rather than ploughing of asperities.
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Citation
Oesterle, W. and Urban, I., "Third Body Formation on Brake Pads and Rotors," SAE Technical Paper 2004-01-2767, 2004, https://doi.org/10.4271/2004-01-2767.Also In
SAE 2004 Transactions Journal of Passenger Cars: Mechanical Systems
Number: V113-6; Published: 2005-07-05
Number: V113-6; Published: 2005-07-05
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