Carbon containing layer
First Claim
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1. A workpiece comprising a substrate having a sliding surface provided with a friction-reducing coating;
- said coating consisting essentially of elemental carbon dispersed in a matrix formed of at least one metallic element in the proportions of 50.1 to 99.9 at % of the elemental carbon and 0.1 to 49.9 at % of the metallic element, the ratio of the metallic element to the elemental carbon differing from the stoichiometric ratio of a carbide.
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Abstract
A workpiece comprises a substrate having a sliding surface provided with a friction-reducing coating. Such coating consists essentially of elemental carbon dispersed in a matrix formed of at least one metallic element in the proportions of 50.1 to 99.1 at % of the elemental carbon and 0.1 to 49.9 at % of the metallic element. The ratio of the metallic element to the elemental carbon differs from the stoichiometric ratio of the carbide.
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Citations
15 Claims
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1. A workpiece comprising a substrate having a sliding surface provided with a friction-reducing coating;
said coating consisting essentially of elemental carbon dispersed in a matrix formed of at least one metallic element in the proportions of 50.1 to 99.9 at % of the elemental carbon and 0.1 to 49.9 at % of the metallic element, the ratio of the metallic element to the elemental carbon differing from the stoichiometric ratio of a carbide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A workpiece comprising:
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a substrate having a surface; and
a friction-reducing coating on the surface of the substrate having a coefficient of sliding friction;characterized in that the friction-reducing coating consists essentially of elemental carbon dispersed in a matrix formed by at least one metallic element, the ratio of carbon to the metallic element ranging from 50.1/49.9 to 99.9/0.1, said ratio differing from the stoichiometric ratio of a carbide. .Iaddend. .Iadd. - View Dependent Claims (14)
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15. friction-reducing coating is X-ray amorphous. .Iaddend. .Iadd.17. A system comprising:
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a first workpiece having a surface; a second workpiece having a surface, the surface of the first workpiece bearing against and sliding with respect to the surface of the second workpiece; and a friction-reducing coating on the surface of the first workpiece; characterized in that the friction-reducing coating consists essentially of elemental carbon dispersed in a matrix formed by at least one metallic element, the ratio of carbon to the metallic element ranging from 50.1/49.9 to 99.9/0.1 said ratio differing from the stoichiometric ratio of a carbide. .Iaddend. .Iadd.18. A system as claimed in claim 17, characterized in that the friction-reducing coating is X-ray amorphous. .Iaddend. .Iadd.19. A system as claimed in claim 18, further comprising a friction-reducing coating on the surface of the second workpiece.
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Specification