Title: Study on influence of alumina nanoparticles on automotive brake friction materials

Authors: Liping Ma; Yanping Zhao

Addresses: Department of Mechanical and Electronic Engineering, Luohe Vocational Technology College, Luohe, 462000, China ' Department of Mechanical and Electronic Engineering, Luohe Vocational Technology College, Luohe, 462000, China

Abstract: In this paper, the changes of porosity, density, hardness, wear rate, impact strength and compression ratio of resin matrix friction materials when alumina nanoparticles are 2%, 4%, 6%, 8% and 10% of the mass of resin matrix friction materials are studied. With the help of SEM, the surface appearance is observed, and the Rockwell hardness tester, fixed speed friction testing machine, and simple support beam impact testing machine are used to complete the test. The results show that with the increase of alumina nanoparticle content, the porosity, density, hardness and impact resistance of friction materials are improved, and the compression ratio is reduced. The wear rate of friction materials increases during the increase of friction temperature, but under the condition of a maximum friction temperature of 350°C, resin-based friction materials with alumina nanoparticle content of 6% have the lowest wear rate.

Keywords: alumina nanoparticles; car brakes; friction materials; porosity; hardness; wear rate.

DOI: 10.1504/IJMMP.2023.134767

International Journal of Microstructure and Materials Properties, 2023 Vol.16 No.6, pp.482 - 494

Received: 22 Mar 2023
Accepted: 14 Jul 2023
Published online: 09 Nov 2023 *

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