Multi-metal sulfide pre-blend combination on the tribological performance of the brake friction material

Abstract

Purpose

The purpose of this study is the influence of various combinations of metal sulfides on the tribological performance of brake pads.

Design/methodology/approach

Three brake pads were prepared using the possible combination of any two of the solid lubricants from Bismuth trisulfide (Bi₂S₃); Tin disulfide (SnS₂) and Antimony trisulfide (Sb₂S₃) are chosen and blended with molybdenum disulfide and graphite. The tribological performance was compared with the brake pad containing aftermarket sulfide mixture. The tribological performance parameters such as performance coefficient of friction, fade percent, recovery percent, wear thickness loss, time is taken to reach the maximum temperature and fluctuation of friction were investigated using Chase tribometer adopting IS 2742 Part-4 (1994) test procedure.

Findings

The friction stability of the brake pad with 4Wt% of MoS₂, Bi₂S₃ and SnS₂ was observed to be better, but it showed poor wear performance and aggressive towards the rotor, whereas the brake pad contained 4Wt% of MoS₂, Bi₂S₃ and Sb₂S₃ exhibited improved wear performance.

Originality/value

This paper explains the influence of the combination of multiple metal sulfide in the tribological performance of the copper-free brake friction composite.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2020-0249/

Citation

K., S., A.S., S., Balachandran, S.R. and P., H. (2021), "Multi-metal sulfide pre-blend combination on the tribological performance of the brake friction material", Industrial Lubrication and Tribology, Vol. 73 No. 2, pp. 235-334. https://doi.org/10.1108/ILT-07-2020-0249