Compositions, Functions, and Testing of Friction Brake Materials and Their Additives

Abstract

PrefaceThis report was prepared as an information resource for the development of advanced brake materials for heavy vehicles. This research is sponsored by the U.S. Department of Energy, Office of Transportation Technologies. It is part of an initiative aimed at reducing the running resistance while improving the safety of on-highway heavy trucks. Selected information on aircraft brake materials was included for comparison purposes. Data in this report have been compiled from a variety of commercial and non-commercial sources. The validity of the data in this compilation is the responsibility of the originators, and information contained herein should be used mainly as a guide and for the sake of comparison. Normally, IS0 units are used in ORNL reports, but in this case, the units have been ,reported in the measurement systems that were used in the original references. They reflect the diversity in current preferences for units of measure in the commercial brakes industry.

Friction and surface fracture of a silicon carbide ceramic brake disc tested against a steel pad

“…Silicon carbide becomes a key constituent in a carbon fibre reinforced ceramic composite, a material that has been exploited actively as a new generation of brake disc, or rotor, for braking application in automotive vehicles, airplanes and heavy duty machineries 1,2,3,4,5,6 .…”

Temperature and thermal stresses in a pad/disc during braking

“…The metal-ceramic frictional materials are now extensively used in brake systems because of their high thermal stability and wear resistance [26,27].…”

Investigation of Mechanical Properties of Horn Powder-Filled Epoxy Composites

“…Girisha et al have investigated the effect of water absorption on the mechanical properties of sisal and coconut coir-reinforced epoxy composites and found that exposure to moisture caused a significant drop in the mechanical properties due to the degradation of the fibre-matrix interface [9]. Blau has presented a survey of compositions, functions and testing of commercial friction brake materials and their additives [10]. Deo and Acharya have studied abrasive wear behaviour of Lantana-Camara Fibre reinforced epoxy composites and observed that the optimum wear reduction was obtained when the fibre content is 40 weight % [11].…”