The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 2017
Filed:
Apr. 30, 2014
Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v., Munich, DE;
H-o-t Haerte- Und Oberflaechentechnik Gmbh & Co. KG, Nuremberg, DE;
FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., Munich, DE;
H-O-T HAERTE- UND OBERFLAECHENTECHNIK GMBH & CO. KG, Nuremberg, DE;
Abstract
The invention relates to the production of wear-resistant layers which are exposed to friction wear on surfaces of components of internal combustion engines. In the process, wear-resistant layers are formed on the respective surface by electric arc discharge under vacuum conditions. The wear-resistant layers are formed from at least approximately hydrogen-free tetrahedrally amorphous (ta-C) comprising a mixture of sp2 and sp3 hybridized carbon and have a microhardness of at least 3500 HV and an arithmetical mean roughness value Ra of 0.1 μm without a mechanical, physical and/or chemical surface processing taking place.