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US-12618438-B2 - Sliding material, bearing, and methods of making and using the same

US12618438B2US 12618438 B2US12618438 B2US 12618438B2US-12618438-B2

Abstract

A sliding material including: a substrate, and a textured sliding layer overlying the substrate, where the sliding layer includes asperities including a plurality of apexes and nadirs, where 1) the sliding layer has a root mean square gradient of less than 0.064; 2) the sliding layer has an apex material portion of less than 10%; 3) the sliding layer has a nadir material portion of less than 75%, and where the textured sliding layer induces formation of a film when engaged in a rotational interface w/ another component.

Inventors

  • Jing Dong
  • Nafih Mekhilef
  • Vincent DiMartino
  • Christian Murphy

Assignees

  • SAINT-GOBAIN PERFORMANCE PLASTICS CORPORATION

Dates

Publication Date
20260505
Application Date
20221013

Claims (19)

  1. 1 . A sliding material comprising: a substrate, and a textured sliding layer overlying the substrate, wherein the textured sliding layer comprises asperities comprising a plurality of apexes and nadirs, wherein the textured sliding layer has an apex material portion of less than 10% and a nadir material portion of less than 75%, wherein the textured sliding layer has a root mean square gradient of less than 0.064, and wherein the textured sliding layer induces formation of a film when engaged in a rotational interface with another component.
  2. 2 . An assembly comprising: a first component; a second component; and a bearing located between the first component and the second component, the bearing comprising: a substrate, and a textured sliding layer overlying the substrate, wherein the textured sliding layer comprises asperities comprising a plurality of apexes and nadirs, wherein the textured sliding layer has an apex material portion of less than 10% and a nadir material portion of less than 75%, wherein the textured sliding layer has a root mean square gradient of less than 0.064, and wherein the textured sliding layer induces formation of a film when engaged in a rotational interface with another component.
  3. 3 . The sliding material according to claim 1 , wherein the surface of the component has a surface roughness of less than 0.4 microns.
  4. 4 . The sliding material according to claim 1 , wherein the substrate comprises a porous metallic selected from a mesh material, a grid, an expanded sheet, or a perforated sheet.
  5. 5 . The sliding material according to claim 1 , wherein the substrate includes aluminum, magnesium, zinc, iron, or an alloy thereof.
  6. 6 . The sliding material according to claim 1 , wherein the surface of the component includes aluminum, magnesium, zinc, iron, or an alloy thereof.
  7. 7 . The sliding material according to claim 1 , wherein the textured sliding layer comprises a fluoroploymer.
  8. 8 . The sliding material according to claim 1 , wherein the textured sliding layer comprises a polytetrafluoroethylene (PTFE), a polyamide (PA), a polyether ether ketone (PEEK), a polyimide (PI), a polyamideimide (PAI), a polyphenylene sulfide (PPS), a polyphenylene sulphone (PPSO2), a liquid crystal polymers (LCP), perfluoroalkoxypolymer (PFA), polyoxymethylene (POM), polyethylene (PE), UHMWPE, or a mixture thereof.
  9. 9 . The sliding material according to claim 1 , wherein the textured sliding layer comprises an organic filler comprising polytetrafluoroethylene (PTFE), a polyamide (PA), a polyether ether ketone (PEEK), a polyimide (PI), a polyamideimide (PAI), a polyphenylene sulfide (PPS), a polyphenylene sulphone (PPSO2), a liquid crystal polymers (LCP), perfluoroalkoxypolymer (PFA), polyoxymethylene (POM), polyethylene (PE), UHMWPE, ethylene propylene diene, or a mixture thereof.
  10. 10 . The sliding material according to claim 1 , wherein the textured sliding layer has a thickness of at least about 0.05 mm.
  11. 11 . The sliding material according to claim 1 , wherein the textured sliding layer has a thickness of not greater than about 5 mm.
  12. 12 . The sliding material according to claim 1 , wherein the substrate has a thickness of at least about 0.05 mm.
  13. 13 . The sliding material according to claim 1 , wherein the substrate has a thickness of not greater than about 5 mm.
  14. 14 . The sliding material according to claim 1 , wherein the substrate is embedded in the textured sliding layer.
  15. 15 . The sliding material according to claim 1 , wherein the sliding material is manufactured into a bearing by cutting a blank from the laminate; and forming a semi-finished bearing from the blank.
  16. 16 . The assembly according to claim 2 , wherein the assembly further comprises a grease.
  17. 17 . The assembly according to claim 16 , wherein the grease comprises polytetrafluoroethylene.
  18. 18 . The assembly according to claim 16 , wherein the nadirs in the textured sliding layer contain the grease.
  19. 19 . The assembly according to claim 16 , wherein the grease is present on 25% of the total surface area of the bearing.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims priority under 35 U.S.C. § 119(e) to U.S. Provisional Application No. 63/262,539, entitled “SLIDING MATERIAL, BEARING, AND METHODS OF MAKING AND USING THE SAME,” by Jing DONG et al., filed Oct. 14, 2021, which is assigned to the current assignee hereof and incorporated herein by reference in its entirety. FIELD OF THE DISCLOSURE This disclosure generally relates to sliding material and, in particular, to a sliding material used in bearings and methods of making and using the same. BACKGROUND Commonly, sliding members including sliding materials constrain relative movement to the desired motion and reduce friction between moving parts. One type of sliding member may be located in a gap between the outer surface of a first component and the inner surface of the bore of a second component within an assembly. Exemplary assemblies may include door, hood, tailgate, and engine compartment hinges, seats (e.g., seat recliners), steering columns, flywheels, driveshaft assemblies, or may include other assemblies notably those used in automotive applications. Sometimes, there exists a need to have certain sliding properties across components such as the first component (such as a shaft) and the second component (such as a housing) in such an assembly. Therefore, there exists is an ongoing need for improved sliding members and sliding materials that provide improved sliding properties while maintaining a longer lifetime of the assembly. SUMMARY Embodiments of the invention may include: a sliding material including: a substrate, and a textured sliding layer overlying the substrate, where the sliding layer includes asperities including a plurality of apexes and nadirs, where the sliding layer has a root mean square gradient of less than 0.064, where the textured sliding layer induces formation of a film when engaged in a rotational interface w/ another component. Embodiments of the invention may include: A sliding material including: a substrate, and a textured sliding layer overlying the substrate, where the sliding layer includes asperities including a plurality of apexes and nadirs, where the sliding layer has an apex material portion of less than 10% where the textured sliding layer induces formation of a film when engaged in a rotational interface w/ another component. Embodiments of the invention may include: A sliding material including: a substrate, and a textured sliding layer overlying the substrate, where the sliding layer includes asperities including a plurality of apexes and nadirs, where the sliding layer has a nadir material portion of less than 75%, where the textured sliding layer induces formation of a film when engaged in a rotational interface w/ another component. Embodiments of the invention may include: A bearing including: a substrate, and a textured sliding layer overlying the substrate, where the sliding layer includes asperities including a plurality of apexes and nadirs, where the sliding layer has a root mean square gradient of less than 0.064, where the textured sliding layer induces formation of a film when engaged in a rotational interface w/ another component. Embodiments of the invention may include: A bearing including: a substrate, and a textured sliding layer overlying the substrate, where the sliding layer includes asperities including a plurality of apexes and nadirs, where the sliding layer has an apex material portion of less than 10% where the textured sliding layer induces formation of a film when engaged in a rotational interface w/ another component. Embodiments of the invention may include: A bearing including: a substrate, and a textured sliding layer overlying the substrate, where the sliding layer includes asperities including a plurality of apexes and nadirs, where the sliding layer has a nadir material portion of less than 75%, where the textured sliding layer induces formation of a film when engaged in a rotational interface w/ another component. Embodiments of the invention may include: An assembly including: a first component; a second component; and a bearing located between the first component and the second component, the bearing including: a substrate, and a textured sliding layer overlying the substrate, where the sliding layer includes asperities including a plurality of apexes and nadirs, where the sliding layer has a root mean square gradient of less than 0.064, where the textured sliding layer induces formation of a film when engaged in a rotational interface w/ another component. Embodiments of the invention may include: An assembly including: a first component; a second component; and a bearing located between the first component and the second component, the bearing including: a substrate, and a textured sliding layer overlying the substrate, where the sliding layer includes asperities including a plurality of apexes and nadirs, where the sliding layer has an apex material portion of less th