Electrical insulated bearing
A bearing component having a ceramic surface, the ceramic surface including a plurality of pores, and at least some of the pores are at least partially filled with a resin comprising a resole phenolic resin.
1. A bearing component having a ceramic surface:
the ceramic surface including a plurality of pores, wherein
at least some of the pores are at least partially filled with a resin comprising a resole phenolic resin.
2. The bearing component according to claim 1 , wherein the ceramic is provided as a surface coating on a metal or alloy substrate.
3. The bearing component according to claim 2 , wherein the ceramic surface is a non-wear surface.
4. The bearing component according to claim 3 , wherein the bearing component is an inner or an outer raceway.
5. The bearing component according to claim 4 , wherein the ceramic surface coating has a mean thickness of from 0.04 to 1 mm.
6. The bearing component according to claim 5 , wherein the ceramic comprises a metal oxide.
7. The bearing component according to claim 5 , wherein the ceramic comprises an aluminium oxide.
8. The bearing component according to claim 5 , wherein the ceramic comprises aluminium oxide.
9. A bearing comprising:
a bearing component according to claim 1 .
10. The bearing according to claim 9 , wherein the bearing is an insulated bearing.
11. The bearing component according to claim 4 , wherein the ceramic surface coating has a mean thickness of from 0.1 and 0.5 mm.
12. The bearing component according to claim 1 , wherein the ceramic is provided as a surface coating on a steel substrate.
13. A process for making a bearing component, the process comprising:
providing a bearing component comprising a metal or alloy substrate;
forming a ceramic layer on a surface of the substrate, wherein the ceramic layer includes a plurality of pores in an outer surface thereof;
impregnating the ceramic layer with a resin comprising a resole phenolic resin, wherein at least some of the pores in the ceramic layer are at least partially filled with resin; and
curing the resin.
14. The process according to claim 13 , wherein the step of forming the ceramic layer on a surface of the substrate comprises one or more of:
(a) plasma spraying;
(b) suspension spraying;
(c) high velocity oxygen fuel spraying; and/or
(d) flame spraying.
15. The process according to claim 14 , wherein the ceramic layer is formed with a mean thickness of from 0.04 to 1 mm.
16. The process according to claim 15 , further comprising a finishing step of at least one of removing at least a portion of resin remaining on the ceramic layer and removing at least a portion of the ceramic layer impregnated with the resin.
17. The process for making a bearing component according to claim 16 , wherein the resin used in the step of impregnating the ceramic layer is pre-dissolved in one or more organic solvents.
18. The process according to claim 14 , wherein the ceramic layer is formed with a mean thickness of from 0.1 and 0.5 mm.
19. The process according to claim 13 , wherein the metal or alloy substrate is a steel substrate.