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Brake friction materials comprising of varying proportions of lapinus and wollastonite fibres are designed, fabricated and characterized for their chemical, physical, mechanical and tribological properties. Tribological performance evaluation in terms of performance coefficient of friction, friction-fade, friction-recovery, disc temperature rise (DTR) and wear is carried out on a Krauss machine following regulations laid down by Economic Commission of Europe (ECE R-90). The increase in wollastonite fibre led to an increase in density and hardness whereas void content, heat swelling, water absorption and compressibility increased with the increased in lapinus fibre. The performance coefficient of friction, friction-fade behaviour and friction-stability have been observed to be highly dependent on the fibre combination ratio i.e. coefficient of friction, fade and friction-stability follow a consistent decrease with a decrease in the lapinus fibre content, whereas the frictional fluctuations in terms of l max À l min have been observed to increase with a decrease in lapinus fibre content. However, with an increase in wollastonite fibre content in formulation mix, a higher wear resistance and recovery response is registered. The worn surface morphology has revealed topographical variations and their underlying role in controlling the friction and wear performance of such brake friction composites. ª 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

This research article presents the fabrication and investigation of physical, thermomechanical, and erosive wear properties of glass fiber-reinforced epoxy composites with and without waste marble dust. The composites were fabricated by vacuum-assisted resin transfer molding (VARTM) technique under controlled operating condition. The filler material (marble dust) was varied in the range of 0-30 wt% in the composite at an interval of 10 wt% to find out the physical (density, void content, hardness and XRD), thermomechanical (storage modulus, loss modulus, damping factor, and thermal conductivity), and erosive wear rate, respectively. This study clearly demonstrated that with the increased filler content, the density, void content, and hardness of the composites were shown promising results along with the crystallinity of the composites. The storage modulus and loss modulus of the unfilled and particulate-filled composites were shown positive effect up to a temperature range of 60 C and then observed decreased trend irrespective of change in filler content with the increased temperature. However, as far as erosion rate was concerned, the particulate-filled composites were shown better wear resistance with the change in impact velocity as well as impingement angle in steady-state operating condition as compared with unfilled composite. At the end, the obtained experimental results were compared with already reported theoretical model in order to validate the results along with the microstructural analysis of composites were also studied to understand the wear mechanism. POLYM. COMPOS., 40:4113-4124, 2019.