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Metal-CMC Hybrid Brake Disc for E-Mobility

Title data

Opel, Thorsten ; Langhof, Nico ; Krenkel, Walter ; Schafföner, Stefan:
Metal-CMC Hybrid Brake Disc for E-Mobility.
2021
Event: Friction 2021: European Symposium on Friction, Wear and Wear Protection , 18. - 19.11.2021 , Online.
(Conference item: Conference , Speech )

Abstract in another language

Future mobility concepts like electric powered vehicles demand for new braking technologies and brake disc concepts. Due to the technological progress regarding the recuperation capabilities of electric vehicles, friction brakes are merely needed for complementary braking and more importantly for emergency braking manoeuvres. Consequently, new brake disc designs are needed in which for example the mass of the brake discs can be reduced. Due to the fact, that the brake discs in electric powered vehicles aren’t used as frequently, the corrosion of the brake discs and brake pads are problems which have to be coped with. Thusly the use case for brake discs for electric powered vehicles is very different compared to state-of-the-art brake discs.
A new concept in the form of a metal-CMC hybrid brake disc is propagated for the use in E-Mobility. It consists of an aluminium carrier body which is lined with ceramic friction segments on the friction surface of both sides. For the friction segments a short fibre reinforced CMC (C/SiC) is used. The outlined concept allows for a light-weight, corrosion resistant and economically viable emergency brake with outstanding friction properties for the use in E-Mobility.
A potential use case of a mid-class sedan with a mass of around 1.8 t and maximum travelling speeds of up to 200 km/h is taken as a basis for the design and construction of a metal-ceramic hybrid brake disc prototype, which was tested on the dynamometer test bench at the University of Bayreuth under emergency braking conditions. The brake disc was tested with three different brake pad materials (LowMet, C/SiC, C/C) at three different braking pressures (1, 2 & 3 MPa). Different characteristic values like wear, COF and different temperatures were measured. Furthermore, the friction surfaces of the brake pads were evaluated using secondary electron microscopy.

Further data

Item Type: Conference item (Speech)
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science > Chair Ceramic Materials
Faculties > Faculty of Engineering Science > Chair Ceramic Materials > Chair Ceramic Materials - Univ.-Prof. Dr.-Ing. Stefan Schafföner
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 16 Dec 2021 11:58
Last Modified: 16 Dec 2021 11:58
URI: https://eref.uni-bayreuth.de/id/eprint/68166