Browse Publications Technical Papers 2018-01-1867

Cementitious-Based Brake Pads Technology: Performance, Low Energy Consumption, Emission Drop 2018-01-1867

Brake pads employing innovative hydraulic inorganic binders in place of common state-of-the-art thermosetting phenolic resins have been produced by means of a unique prototypal equipment and a distinctive manufacturing process. Such completely novel brake pad technology has already been reported by us as a promising opportunity in the panorama of friction material advancements. The unicity of the process enables us to exclude completely any thermal cycle in the manufacturing steps, with a considerable positive energy balance compared to the standard counterpart. Realized brake pads have indeed been successfully tuned to meet the braking performances of phenolic counterparts, for chosen applications. In the present work our latest efforts in this field are illustrated, focusing our attention to three main areas of interest: performance, energy consumption, volatile organic emissions. One selected exponent of our cementitious-based material is reported demonstrating both its capability of matching standard OE and AM braking performances, when investigated through a full scale brake dynamometer (SAE J2522 procedure), and even more remarkably its feasibility to be released as an actual AM material according to ECE R90 regulation (road test on vehicle). The energetic evaluation of the employed technology in term both of prototypal manufacturing process and employed raw materials has been established in details, demonstrating the advantages of this new system compared to the analogous standard one. Finally, we concluded our investigation with selected thermo-chemical analysis (TGA-IR and pyrolysis GC-MS) devoted at identifying the key organic compounds potentially/eventually emitted during braking at various temperatures. Our material shows a dramatic drop of the volatile hazardous/organic compounds (VHCs/VOCs) released by a standard phenolic homologous. The results obtained in the present work confirm the favorable characteristics of our inorganic hydraulic-material-based brake pads, once more opening the way to further echoes for such pioneering technology.


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