Carbon-based coating

摘要

The invention relates to a carbon-based coating (2) which as well as carbon as principal ingredient has at least one first element selected from a group consisting of the transition metals from groups 3 to 10 of the Periodic Table of the Elements, the carbon in the coaling (2) being present predominantly in sp2-hybridized form, and the coating (2) comprising at least one further element from a group encompassing silicon, germanium, aluminum, and the transition metals from groups 3 to 10 of the Periodic Table of the Elements, with the proviso that said at least one further element is not the same as the first element, and the cumulative fraction of said at least one further element in the coating (2) is between 0.1 at % and 5 at %, and the cumulative fraction of said at least one first element is between 0.5 at % and 10 at %.

主权项

1. A multi-layer coating having carbon as the main component, wherein the carbon in the coating is mostly present in sp2-hybridized form, the coating comprising:
at least one first element selected from a first group consisting of the transition metals from groups 3 to 10 (new IUPAC nomenclature) of the periodic table of the elements, and at least one further element from a further group consisting of silicon, germanium, aluminum and the transition metals from groups 3 to 10 (new IUPAC nomenclature) of the periodic table of the elements, with the proviso that the at least one further element is not the same as the first element, wherein the cumulative fraction of this at least one further element in the coating is between 0.1 at % and 5 at % and the cumulative fraction of the at least one first element is between 0.5 at % and 10 at %, wherein the coating is formed by a layer system comprising individual layers of different compositions directly deposited on one another, wherein:
(a) the layer system is formed by a sequence of individual layers comprising
a first sub-layer with the first element as the main component,a second sub-layer with carbon as the main component,a third sub-layer with the further element as the main component anda fourth sub-layer with carbon as the main component,wherein
(i) the first sub-layer, the second sub-layer, the third sub-layer, and the fourth sub-layer consist of pure elements; or(ii) the first sub-layer, the second sub-layer, the third sub-layer, and the fourth sub-layer comprise a multi-element system of at least two individual elements selected from the first group or the further group, wherein the layer thickness of each of the sub-layers where either the first element or the further element predominates is between 0 nm and 0.2 nm and the layer thickness of each of the sub-layers where carbon is the main component is between 0.5 nm and 1.5 nm; or(b) the layer system is formed by the sequence of individual layers comprising
a first sub-layer with carbon as the main component,a second sub-layer with carbon as the main component,a third sub-layer with the first element as the main component anda fourth sub-layer with the further element as the main component.