Effect of zinc powder content on tribological behaviors of brake friction materials

Brake friction materials with different zinc powder contents (0, 2, 4, 6, 8 wt.%) were fabricated via powder metallurgy method. The results indicate that with the increasing zinc powder content, the density and thermal conductivity of the materials gradually increase, while the hardness decreases mo...

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Bibliographic Details
Published inTransactions of Nonferrous Metals Society of China Vol. 30; no. 11; pp. 3078 - 3092
Main Authors YANG, Yang, LIANG, Lu-xin, WU, Hong, LIU, Bo-wei, QU, Hui, FANG, Qi-hong
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.11.2020
Subjects
brake friction material
braking noise
tribological behavior
zinc powder content
braking noise
zinc powder content
brake friction material
tribological behavior
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Summary:Brake friction materials with different zinc powder contents (0, 2, 4, 6, 8 wt.%) were fabricated via powder metallurgy method. The results indicate that with the increasing zinc powder content, the density and thermal conductivity of the materials gradually increase, while the hardness decreases monotonously. With increasing zinc powder content, the curve of the nominal friction coefficient shows fluctuating trend but the lowest friction coefficient also shows an increase. However, the wear rate and braking noise of the friction material monotonously decrease with increasing zinc content. This effect may be attributed to the transformation of the tribological mechanism from adhesive wear and abrasive wear to adhesive wear. The brake friction material with 4 wt.% zinc powder exhibits both the best tribological and noise performance.
ISSN:1003-6326
DOI:10.1016/S1003-6326(20)65444-9