Method for producing a particulate carrier material, which is sheathed in a graphene-containing material, and a slide element, and slide element, slip ring seal and bearing arrangement

Patent metadata

Field	Value
Publication number	US-11401479-B2
Application number	US-201816628587-A
Country	US
Kind code	B2
Filing date	Jul 5, 2018
Priority date	Jul 7, 2017
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

The invention relates to a sliding member having a first sliding surface, wherein the first sliding surface ( 29 ) comprises a particulate support material ( 6 ) and a graphene-containing material ( 7 ), wherein the particulate support material ( 6 ) is at least partially coated with the graphene-containing material ( 7 ), and wherein a material bond ( 14 ) is present between the particulate support material ( 6 ) and the graphene-containing material ( 7 ).

First claim

The invention claimed is:

1. A sliding member comprising a first sliding surface, the first sliding surface comprising a particulate support material and a graphene-containing material, the particulate support material being at least partially coated with the graphene-containing material, and a material bond being present between the particulate support material and the graphene-containing material, wherein the first sliding surface has 6 to 8% by volume of macropores in relation to the total volume of the first sliding surface.

2. The sliding member according to claim 1 , wherein the particulate support material is completely coated with the graphene-containing material.

3. The sliding member according to claim 2 , further comprising a first base body associated with the first siding surface, said first base body consisting of said particulate support material.

4. The sliding member according to claim 1 , wherein the first sliding surface consists of a mixture of particulate support material and particulate support material coated with graphene-containing material.

5. The sliding member according to claim 4 , wherein a mass ratio of particulate support material and particulate support material coated with graphene-containing material is 80:20 to 99.5:0.5.

6. The sliding member according to claim 1 , wherein the particulate support material consists of a ceramic material selected from the group consisting of: SiC, WC, B 4 C, BN, Si 3 N 4 , Al 2 O 3 , MgO, ZrO 2 and mixtures thereof.

7. The sliding member according to claim 1 , the graphene-containing sheathing comprising a coating of up to 100 layers of graphene-containing material.

8. A mechanical seal comprising: a rotating first slide ring having a first sliding surface and a stationary second slide ring having a second sliding surface defining a sealing gap therebetween, the first slide ring and/or the second slide ring being a sliding member according to claim 1 .

9. A bearing arrangement comprising at least one sliding member according to claim 1 .

10. The sliding member according to claim 4 , wherein a mass ratio of particulate support material and particulate support material coated with graphene-containing material is 90:10 to 99.5:0.5.

11. The sliding member according to claim 1 , wherein the graphene-containing sheathing comprises a coating of up to 20 layers of graphene-containing material.

12. The sliding member according to claim 1 , wherein the graphene-containing sheathing comprises a coating of up to 12 layers of graphene-containing material.

13. The bearing arrangement according to claim 9 , wherein the bearing is selected from the group consisting of: a slide bearing, a roller bearing, a radial slide bearing and an axial slide bearing.

Assignees

• Eagleburgmann Germany Gmbh

Inventors

• Mulhaupt Rolf
• Thelke Jorg Thomas
• Zhang Wenli

Classifications

• F16J15/3496

  use of special materials · CPC title

• C04B41/5001

  with carbon or carbonisable materials · CPC title

• C04B2235/3821

  Boron carbides · CPC title

• C04B2235/386

  Boron nitrides · CPC title

• C04B2235/77

  Density · CPC title