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Frictional Properties and Mechanisms of an Organic-Metal Brake Pair Braking Repeatedly in Magnetic Field

Author:
Bao, Jiusheng  Lu, Lijian  Yin, Yan  Ge, Shirong  Liu, Tonggang  Liu, Yang  


Journal:
TRIBOLOGY TRANSACTIONS


Issue Date:
2018


Abstract(summary):

With the aim to investigate repeated braking of organic-metal brake pairs, tribological and scanning electron microscopy (SEM) experiments were performed to reveal the influence of a magnetic field on the tribological performance of brakes. A nonasbestos copper-based brake pad and gray cast iron brake disc were selected as the brake pair. The X-DM pad-on-disc friction tester was improved to set up a tribological tester under a magnetic field. The worn surfaces were observed by SEM to reveal the friction mechanisms. It was found that a magnetic field can ameliorate the dynamic friction and wear. In addition, the global mean friction coefficient increases and the wear resistance of brake materials improves. A magnetic field promotes surface oxidation and aggravates the surface heat emission condition. As a result, the mean temperature on the friction surface increases obviously. An appropriate magnetic field can improve the dynamic temperature rise and decrease the global temperature rise on the friction surface. It is considered that a magnetic field has important influences on tribological performance in repeated braking. Therefore, this research could provide theoretical references for studying the tribological performance in repeated braking and/or under a magnetic field.


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