Lubricant composition for lapping ceramic material, and related methods

Patent metadata

Field	Value
Publication number	US-10144901-B2
Application number	US-201615043986-A
Country	US
Kind code	B2
Filing date	Feb 15, 2016
Priority date	Feb 15, 2016
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

Disclosed herein are embodiments of a method of making a lubricant composition for lapping a ceramic material. The method includes mixing a base lubricant component and a powdered wax composition component to form the lubricant composition. The powdered wax composition component includes a powdered wax dispersion or a powdered wax emulsion. The amount of powdered wax composition component mixed with the base lubricant component is from 0.01 to 10 percent by weight of the lubricant composition. Also disclosed herein are embodiments of related lubricant compositions and/or methods of using the lubricant to lap a ceramic substrate (e.g., one or more bars of sliders).

First claim

What is claimed is:

1. A method of making a lubricant composition for lapping a ceramic material, wherein the method comprises mixing a base lubricant component and a powdered wax composition component to form the lubricant composition, wherein the powdered wax composition component comprises a powdered wax dispersion or a powdered wax emulsion, and wherein the amount of powdered wax composition component mixed with the base lubricant component is from 0.01 to 10 percent by weight of the lubricant composition.

2. The method of claim 1 , wherein the base lubricant component comprises a base lubricant selected from the group consisting of an aqueous base lubricant, an organic base lubricant, and combinations thereof, and wherein the amount of base lubricant component mixed with the powdered wax composition component is from 90-99.99 percent by weight of the lubricant composition.

3. The method of claim 1 , wherein the base lubricant component comprises an alkene diol and water.

4. The method of claim 1 , wherein the powdered wax composition component comprises a powdered wax composition selected from the group consisting of a powdered paraffin composition, a powdered polytetrafluoroethylene composition, a powdered polyethylene composition, a powdered polypropylene composition, and combinations thereof.

5. The method of claim 4 , wherein the powdered wax composition component comprises a powdered polytetrafluoroethylene dispersion.

6. The method of claim 5 , wherein the powdered polytetrafluoroethylene dispersion comprises 30-70 percent solids.

7. A lubricant composition for lapping a ceramic material, the lubricant composition comprising:
a) a base lubricant, wherein the base lubricant is present in an amount from 93-99.997 percent by weight of the lubricant composition, and wherein the base lubricant comprises at least one alkene diol; and
b) a powdered wax, wherein the powdered wax is present as a dispersion or emulsion in the base lubricant, and wherein the powdered wax is from 0.003 to 7 percent by weight of the lubricant composition.

8. The lubricant composition of claim 7 , wherein the at least one alkene diol is chosen from ethylene glycol, propylene glycol, and mixtures thereof.

9. The lubricant composition of claim 7 , wherein the base lubricant further comprises water.

10. The lubricant composition of claim 9 , wherein the powdered wax is selected from the group consisting of a powdered paraffin, a powdered polytetrafluoroethylene, a powdered polyethylene, a powdered polypropylene, and combinations thereof.

11. The lubricant composition of claim 10 , wherein the powdered wax comprises powdered polytetrafluoroethylene.

12. A method of lapping a ceramic substrate, the method comprising:
a) dispensing a lubricant composition in a manner so that at least a portion of the lubricant composition contacts a surface of a ceramic substrate, wherein the lubricant composition comprises:

i) a base lubricant; and
ii) a powdered wax, wherein the powdered wax is present as a dispersion or emulsion in the base lubricant, and wherein the powdered wax is from 0.003 to 7 percent by weight of the lubricant composition; and
b) lapping the surface of the ceramic substrate with a lapping plate.

13. The method of claim 12 , the wherein the powdered wax is present as a dispersion or emulsion in the base lubricant.

14. The method of claim 12 , wherein the base lubricant is selected from the group consisting of an aqueous base lubricant, an organic base lubricant, and combinations thereof, and wherein the base lubricant is present in an amount from 93-99.997 percent by weight of the lubricant composition.

15. The method of claim 14 , wherein the base lubricant comprises an alkene diol and water.

16. The method of claim 12 , wherein the powdered wax is selected from the group consisting of a powdered paraffin, a powdered polytetrafluoroethylene, a powdered polyethylene, a powdered polypropylene, and combinations thereof.

17. The method of claim 16 , wherein the powdered wax comprises powdered polytetrafluoroethylene.

18. The method of claim 12 , wherein the ceramic substrate is made of material comprising a two-phase mixture of alumina and titanium-carbide.

19. The method of claim 12 , wherein the ceramic substrate is a bar of sliders.

20. The method of claim 19 , wherein the surface of the bar of sliders comprises a plurality of air-bearing surfaces.

21. The method of claim 1 , wherein the base lubricant comprises at least one alkene diol.

22. The method of claim 21 , wherein the at least one alkene diol is chosen from ethylene glycol, propylene glycol, and mixtures thereof.

23. The method of claim 12 , wherein the base lubricant comprises at least one alkene diol.

Assignees

• Seagate Technology Llc

Inventors

• Khan Zubair Ahmed
• Hoehn Joel W
• Gunderson Peter John

Classifications

• C10M173/02

  not containing mineral or fatty oils · CPC title

• C10M2213/062

  Polytetrafluoroethylene [PTFE] · CPC title

• C10N2030/08

  Resistance to extreme temperature · CPC title

• C10M2207/0225

  used as base material · CPC title

• C10M169/041 Primary

  the additives being macromolecular compounds only · CPC title