Sliding bearing with lining layer comprising carbon nanostructures

Patent metadata

Field	Value
Publication number	US-10473160-B2
Application number	US-201314655026-A
Country	US
Kind code	B2
Filing date	Dec 10, 2013
Priority date	Dec 24, 2012
Publication date	Nov 12, 2019
Grant date	Nov 12, 2019

Abstract

A sliding bearing may include a backing layer and a sintered lining layer. The lining layer may include a composition of 0.1 to 10 percent by weight carbon nanostructures embedded in a copper-based matrix. The sliding bearing may include, but is not limited to, at least one of a bearing bush, a bearing shell, and a thrust washer.

First claim

The invention claimed is:

1. A sliding bearing comprising:
a backing layer; and
a sintered copper-based composite lining layer that defines an outermost layer with a running surface relative to the backing layer, the lining layer composed of a material including carbon nanostructures embedded in a copper-based matrix, wherein the material of the lining layer has a composition including:
0.1 to 10% wt of carbon nanostructures;
4 to 10% wt of tin;
up to 1.5% wt of nickel; and
a balance to 100% wt of copper and incidental impurities.

2. A sliding bearing according to claim 1 , wherein the carbon nanostructures of the lining layer are included in a proportion of 0.5-4.0% wt.

3. A sliding bearing according to claim 1 , wherein nickel is present in the composition of the lining layer to facilitate increased corrosion resistance.

4. A sliding bearing according to claim 1 , wherein at least some of the carbon nanostructures are at least partially metal-coated carbon nanostructures having a separate metallic coating disposed thereon, and wherein the separate metallic coating includes a material present in the copper-based matrix.

5. A sliding bearing according to claim 4 , wherein the material of the separate metallic coating is composed of at least one of tin, nickel, and copper.

6. A sliding bearing according to claim 1 , wherein the carbon nanostructures include carbon nanotubes.

7. A sliding bearing according to claim 6 , wherein the nanotubes are 0.5 to 50 nm in diameter.

8. A sliding bearing according to claim 6 , wherein the nanotubes are 1 to 40 μm long.

9. A sliding bearing according to claim 6 , wherein the nanotubes include between 0.1 and 10% vol of the composition of the lining layer.

10. A sliding bearing according to claim 6 , wherein the nanotubes are at least 100 times longer than their diameter.

11. A sliding bearing according to claim 1 , wherein the carbon nanostructures include ball-shaped carbon nanostructures.

12. A sliding bearing according to claim 1 , wherein the carbon nanostructures include ellipsoidal carbon nanostructures.

13. A sliding bearing according to claim 1 , wherein the carbon nanostructures are functionalised carbon nanostructures.

14. A sliding bearing according to claim 1 , wherein the backing layer includes at least one of a bearing bush, a bearing shell, and a thrust washer.

15. An engine comprising: a sliding bearing, the sliding bearing including:
a backing layer; and
a sintered lining layer disposed on the backing layer that defines an outermost layer of the sliding bearing with respect to the backing layer and has a free surface facing away from the backing layer, the lining layer including carbon nanostructures embedded in a copper-based matrix, wherein the lining layer includes a composition, by weight, in the following proportions:
0.1-10% of carbon nanostructures;
4-10% of tin;
0-1.5% of nickel; and
a balance to 100% of copper and incidental impurities.

16. An engine according to claim 15 , wherein at least some of the carbon nanostructures are metal-coated carbon nanostructures having a separate metallic coating disposed at least partially thereon to facilitate bonding of the metal-coated carbon nanostructures with the copper-based matrix, and wherein the separate metallic coating is composed of a material present in the copper-based matrix including at least one of tin, copper and nickel.

17. An engine according to claim 15 , wherein the proportion of carbon nanostructures is 0.5-4.0% wt, and wherein nickel is present in the composition of the lining layer to facilitate increased corrosion resistance.

18. A sliding bearing, comprising:
a backing layer; and
a sintered copper-based composite lining layer that provides an outermost layer with a running surface relative to the backing layer, the running surface defined by a free surface of the lining layer that faces away from the backing layer;
the lining layer having carbon nanostructures embedded in a copper-based matrix, wherein the lining layer has a composition consisting of:
0.1 to 10% wt of carbon nanostructures;
4 to 10% wt of tin;
up to 1.5% wt of nickel; and
a balance to 100% wt of copper and incidental impurities.

19. A sliding bearing according to claim 1 , wherein at least some of the carbon nanostructures have a partial metallic coating disposed thereon composed of at least one of tin, copper and nickel.

20. A sliding bearing according to claim 1 , wherein the running surface is defined by a free surface of the lining layer that faces away from the backing layer.

Assignees

• Mahle Int Gmbh
• Mahle Engine Systems Uk Ltd

Inventors

• Jupe Kevin

Classifications

• B22F1/18

  Non-metallic particles coated with metal · CPC title

• F16C33/124

  Details of overlays · CPC title

• F16C9/00

  Bearings for crankshafts or connecting-rods; Attachment of connecting-rods (lubrication of connecting-rods in connection with crankshafts F16C3/14; connections to crossheads F16C5/00; to pistons F16J1/14) · CPC title

• F16C33/121 Primary

  Use of special materials · CPC title

• C22C26/00

  Alloys containing diamond {or cubic or wurtzitic boron nitride, fullerenes or carbon nanotubes} · CPC title