Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Bayerische Motoren Werke Aktiengesellschaft

Volker Weihnacht

Hans-Joachim Scheibe

Franz-Josef Wetzel

Serge Kursawe

Andreas Leson

Lionel Mathern

Sascha Groetzki

Lisa Krell

Stefan Makowski

A drive assembly for a two-wheeled vehicle, wherein a closed chain is guided around a drive pinion and a sprocket for output. The chain is formed by pins, on each a bush rotatable about the center longitudinal axis of the pin, a roller provided on each bushing, for rotation around the bushing and has play, and the pins being connected to each other at two opposite ends by means of plates. The outer surface of the bushings and the rollers is coated with pure ta-C, having no further chemical elements except for unavoidable trace elements resulting from production in a PVD method. An Rroughness between 0.03 &#x3bc;m and 0.2 &#x3bc;m and/or an Rroughness between 0.3 &#x3bc;m and 2 &#x3bc;m is adhered to the surface of the coatings. The surfaces of the pinion and the sprocket in contact with the rollers do not have a coating of diamond-like carbon.

Drive assembly for a two-wheeled vehicle

A method for a defined surface treatment of a first carbon coating applied to a surface of a component The first carbon coating is brought into touching contact with at least one second carbon coating that is formed on a surface of a tool or second component and the two carbon coatings are moved relatively with one another so that the first carbon coating is smoothed by the second carbon coating. The first carbon coating and/or the second carbon coating are formed from a-C (amorphous carbon) or ta-C (tetrahedrally bonded amorphous carbon).

Method for a defined surface treatment of a first carbon coating applied on a surface of a component

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Dresden, Germany

Volker Weihnacht