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Machine translation
25. (WO2010117955) METHOD AND APPARATUS FOR REDUCING WEAR OF SURFACES IN CONTACT WITH ONE ANOTHER
Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

What is claimed is:

1. A method for reducing wear between two surfaces in contact with one another, with relative motion between the two surfaces, said method comprising: introducing nanoparticles between the two surfaces in an amount and having a composition that results in shear lines being generated within agglomerated wear particles that are generated between the two surfaces as a result of the sliding contact; and subjecting the agglomerated wear particles to at least one load, using at least one of the two surfaces, such that the agglomerated wear particles disassemble along the shear lines into multiple smaller wear particles.

2. The method of Claim 1 wherein introducing nanoparticles comprises at least one of: introducing nanoparticles between the two surfaces via a lubricating fluid; introducing nanoparticles between the two surfaces via a dry powder; introducing nanoparticles between the two surfaces via a coating on one or more of the two surfaces; and introducing nanoparticles between the two surfaces as a constituent of one of the two surfaces in sliding contact.

3. The method of Claim 1 wherein introducing nanoparticles comprises introducing at least one of hexagonal boron nitride (hBN), molybdenum disulfide (MoS2), and tungsten disulfide (WS2) to a machining process.

4. The method of Claim 1 wherein introducing nanoparticles comprises introducing between about 0.1 percent and about ten percent by weight of hexagonal boron nitride (hBN) to lubricating fluid utilized between two steel surfaces in sliding contact with one another.

5. The method of Claim 1 wherein introducing nanoparticles comprises introducing between about 0.1 percent and about ten percent by weight of one of molybdenum disulfide (MoS2) and tungsten disulfide (WS2) to lubricating fluid utilized between a titanium surface and a steel surface in sliding contact with one another.

6. The method of Claim 1 wherein introducing nanoparticles comprises embedding nanoparticles within at least one agglomerated wear particle.

7. The method of Claim 1 wherein introducing nanoparticles comprises adding a specific nanoparticle, by weight percentage, to at least one of a lubricant and a machining fluid that is to be placed between the two surfaces.

8. The method of any of Claims 1-7 further comprising matching a nanoparticle composition with the materials from which the two surfaces are fabricated to produce a sufficient number of shear lines in at least one agglomerated wear particle to induce disassembly of the particles under load.

9. The method of any of Claims 1-8 further comprising selecting a nanoparticle composition to reduce wear between the two surfaces, using a comparison of the costs of specific nanoparticles against an amount of wear reduction provided by the specific nanoparticles.

10. The method of any of Claims 1-8 further comprising selecting a nanoparticle composition to reduce wear between the two surfaces based on maintaining a usable working viscosity of a lubricating fluid utilized to introduce the nanoparticles to the area between the two surfaces.

11. A method for reducing wear of two surfaces in sliding contact with one another, said method comprising: destabilizing, using nanoparticles, wear particles that agglomerate between the two surfaces as a result of the sliding contact; and causing the destabilized, agglomerated wear particles to break down into smaller pieces.

12. The method of Claim 11 wherein destabilizing comprises introducing nanoparticles between the two surfaces in an amount and having a composition that results in shear lines being generated within agglomerated wear particles that are generated between the two surfaces.

13. The method of Claim 11 or 12 wherein causing comprises applying a pressure to the agglomerated wear particles such that the agglomerated wear particles break down along the sheer lines into multiple, smaller wear particles.

14. The method of Claim 11 wherein destabilizing comprises introducing at least one of hexagonal boron nitride (hBN), molybdenum disulfide (MoS2), and tungsten disulfide (WS2) to a machining process.

15. The method of Claim 11 wherein destabilizing comprises embedding nanoparticles within agglomerated wear particles.

16. The method of Claim 11 wherein destabilizing comprises adding a specific nanoparticle, by weight percentage, to at least one of a lubricant and a machining fluid that is to be placed between the two surfaces.

17. The method of any of Claims 11-16 further comprising matching a nanoparticle composition with the materials from which the two surfaces are fabricated to produce a sufficient number of shear lines within the agglomerated wear particles to induce disassembly of the particles under load.

18. A composition to produce shear lines of an agglomerated wear particle, comprising: a fluid lubricant; and at least 0.1 percent by weight of one or more of particles of molybdenum disulfide (MoS2), tungsten disulfide (WS2), and hexagonal boron nitride (hBN), wherein the average particle size in the lubricant is less than 600 nm.

19. The composition of claim 18 wherein the composition particle size is reduced by sonication.

20. The composition of claim 18 or 19 wherein the particle composition weight percentage is between about 0.1 percent and about 10 percent hexagonal boron nitride.

21. The composition of claim 20 wherein the particle composition weight percentage is about one percent hexagonal boron nitride.

22. The composition of claim 18 or 19 wherein the particle composition weight percentage is between about 0.1 percent and about ten percent molybdenum disulfide.

23. The composition of claim 22 wherein the particle composition weight percentage is about four percent molybdenum disulfide.

24. The composition of claim 18 or 19 wherein the particle composition weight percentage is between about 0.1 percent and about ten percent tungsten disulfide.

25. The composition of claim 24 wherein the particle composition weight percentage is about four percent tungsten disulfide.