Coatings for high-temperatures uses with tribological stress

Patent metadata

Field	Value
Publication number	US-9586252-B2
Application number	US-201314434783-A
Country	US
Kind code	B2
Filing date	Oct 9, 2013
Priority date	Oct 10, 2012
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

The present invention relates to a coating for high-temperature uses with tribological stress. The coating comprises a multi-layer system and a top lubricant layer, the top lubricant layer containing molybdenum as a main component.

First claim

What is claimed is:

1. Coating with a multi-layer coating system and a top smear layer, wherein the multi-layer coating system contains at least one HT layer and the top smear layer has a composition according to Mo a —X b —Y c , wherein a, b and c indicate the atomic concentration of the respective components, and a+b+c=1, and 0≦b<a and 0≦c<a, with X being the variable metal component: B, Si, V, W, Zr, Cu and Ag or a combination thereof, with Y as variable non-metallic component: C, O and N or a combination thereof, wherein the multi-layer coating system comprises at least one actively lubricating layer, characterized in that the at least one actively lubricating layer is a Ti—Al—Mo—N layer that has an averaged Mo content when measured by EDX at 10 kV of 20-60 mat %.

2. Coating according to claim 1 , wherein the actively lubricating layer has an averaged Mo content when measured by EDX at 10 kV of 25-35 at %.

3. Coating according to claim 1 , wherein the actively lubricating layer has an averaged Mo content when measured by EDX at 10 kV of 30 at %.

4. Coating according to claim 1 , characterized in that the at least one actively lubricating layer is formed of nano-layers with MoN-rich nano-layers and nano-layers poor in MoN.

5. Coating according to claim 4 , characterized in that the thickness of the MoN-rich nano-layers are between 10-60 nm.

6. Coating according to claim 5 , wherein the thickness of the MoN-rich nano-layers are between 20-50 nm.

7. Coating according to claim 5 , wherein the thickness of the MoN-rich nano-layers are between 30-40 nm.

8. Coating according to claim 5 , wherein the thickness of the MoN-rich nano-layers are 40 nm.

9. Coating according to claim 4 , characterized in that the MoN-rich nano-layers are between 20-50 nm.

10. Coating according to claim 4 , characterized in that the MoN-rich nano-layers are between 30-40 nm.

11. Coating according to claim 4 , characterized in that the MoN-rich nano-layers are 40 nm.

Assignees

• Oerlikon Surface Solutions Ag Trubbach
• Oerlikon Surface Solutions Ag Pfaffikon

Inventors

• Sobiech Mathias Lukas
• Ramm Juergen

Classifications

• C10N2010/10

  Groups 5 or 15 · CPC title

• C10N2040/242

  Hot working · CPC title

• C10N2010/02

  Groups 1 or 11 · CPC title

• C10N2040/25

  Internal-combustion engines · CPC title

• C10N2040/135

  Steam engines or turbines · CPC title