Coated body and a process for coating a body
AssigneeCemeCon AG
InventorsChristian Bareiss, Werner Koelker, Oliver Lemmer
Life of this patent
Estimating the term…
Abstract
The invention relates to a body with a substrate (1), an intermediate layer (2) applied on top thereof and a CVD diamond layer (3) applied to the intermediate layer. In order to propose a body coated with CVD diamond and a production process, in which the body has an increased load-bearing capacity under various mechanical loads, provision is made for the intermediate layer to be predominantly metallic, wherein the metal fraction of the intermediate layer consists predominantly of tungsten and/or chromium, and for the intermediate layer to have a roughness defined by an Rz value of 0.5 μm-3.0 μm.
Claims28
A body with a substrate including a cobalt binder material, an intermediate layer, an adhesion layer located between the substrate and the intermediate layer, and a CVD diamond layer applied to the intermediate layer,
- wherein the intermediate layer is predominantly metallic,
- wherein the metal portion of the intermediate layer contains chromium and is predominantly made of tungsten and/or chromium, and
- wherein the intermediate layer contains, in an area located adjacent to the diamond layer, carbides of metallic elements, including at least Cr7C3and/or Cr3C2,
- wherein the intermediate layer has a roughness, defined by an Rz value of 0.5 μm-3.0 μm, and
- wherein the adhesion layer contains metallic elements from the intermediate layer and cobalt.
A method for the production of a coated body, in which at least a predominantly metallic intermediate layer is applied to a substrate by means of PVD using a magnetron cathode, wherein during at least a part of the time while the intermediate layer is applied said magnetron cathode is operated according to a HPPMS process, wherein the intermediate layer consists predominantly of tungsten and/or chromium, wherein the intermediate layer is blasted with silicon carbide to create a roughness, and wherein a diamond layer is applied to the intermediate layer by means of CVD.
Dependencies are inferred from the claim text.