Effect of Rubber Content on the Properties of Rubber-based Friction Materials Matched Aluminum-based Brake Discs
To develop synthetic brake pads that are well matched with aluminum-based composite brake discs,the rub-ber-based friction materials were prepared using nitrile rubber(NBR)as the primary binder through semi-wet compoun-ding process.The influence of different NBR contents on the mechanical and friction and wear properties of the friction ma-terials was studied,and the wear mechanism of the friction materials were investigated.The results reveal that within the range of 5％to 13％of nitrile rubber mass fraction,as the rubber mass fraction increases,the hardness,compressive strength and impact strength of friction materials show a trend of first increasing and then decreasing,while the compressive modulus gradually decreases.The highest impact strength is achieved at 11％rubber mass fraction.With the increase of rub-ber mass fraction,the friction coefficient and wear rate show a trend of first decreasing and then increasing.The friction material with mass fraction of 11％rubber achieves the lowest wear volume.At lower rubber contents,the wear mechanism of the friction materials are mainly abrasive wear and adhesive wear,with adhesive wear dominating.As the rubber content increases,the main wear mode of friction materials shifts to abrasive wear.When the mass fraction of rubber is 11％,the friction material has excellent properties and is optimally matched to aluminum-based brake discs.The research results pro-vide valuable references for the development of high-performance rubber-based friction materials to meet the requirements of aluminum-based brake discs.
aluminum-based brake discrubber-based friction materialfriction and wear propertywear mechanismmechanical property
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