BONDED ABRASIVE ARTICLE AND METHOD OF USE

• US 20100159806A1
• Filed: 12/15/2009
• Published: 06/24/2010
• Est. Priority Date: 12/15/2008
• Status: Active Grant

• Current Assignee: Saint-Gobain Abrasives Incorporated (Compagnie De Saint-Gobain), Saint-Gobain Abrasifs (Compagnie de Saint-Gobain SA)
• Original Assignee: Saint-Gobain Abrasives Incorporated (Compagnie De Saint-Gobain), Saint-Gobain Abrasifs (Compagnie de Saint-Gobain SA)
• Inventors: Ramanath, Srinivasan, Wu, Jianhui
• Granted Patent: US 8,628,385 B2
• Time in Patent Office: Days
• US Class Current: 451/28
• CPC Class Codes: B24D 3/346 utilised during polishing, or grinding operation
• CPC Class Codes: B24D 5/00 Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting only by their periphery; Bushings or mountings therefor
• CPC Class Codes: C09K 3/1418 obtained by division of a mass agglomerated by sintering

Abstract

An abrasive tool including a bonded abrasive article including a bond material comprising a metal or metal alloy, abrasive grains contained within the bond material, and a reaction agent dispersed within the bond material, wherein the reaction agent chemically reacting with a surface of the workpiece during abrasion to form a reaction product.

Claims

1. A tool comprising:

a bonded abrasive article comprising;

a bond material comprising a metal or metal alloy;

abrasive grains contained within the bond material; and

a reaction agent dispersed within the bond material, the reaction agent chemically reacting with a surface of the workpiece during abrasion to form a reaction product.

2. The article of claim 1, wherein the reaction agent comprises an inorganic material.

3. The article of claim 2, wherein the reaction agent comprises an oxide.

4. The article of claim 3, wherein the reaction agent comprises silica.

6. The article of claim 1, wherein the bond material comprises not greater than about 10 wt % reaction agent for the total weight of the bond material.

9. The article of claim 1, wherein the reaction agent is a particulate material dispersed within the bond material.

16. The article of claim 1, wherein the reaction agent is a particulate material having porosity within the particles.

17. The article of claim 1, wherein the reaction agent is a particulate material having a substantially spherical morphology.

27. The article of claim 1, wherein the abrasive grains include superabrasive materials.

34. The article of claim 1, wherein the abrasive grains comprise composite particles including a core material having a coating, wherein the core material and the coating comprise a different material.

35. The article of claim 34, wherein the core material is a superabrasive material.

36. The article of claim 34, wherein the coating substantially surrounds the core material.

38. The article of claim 34, wherein the coating comprises an oxide.

41. The article of claim 1, wherein the bond material comprises a metal selected from the group of metal consisting of copper, tin, iron, zinc, cobalt, aluminum, molybdenum, titanium, silver, indium, antimony, zirconium, vanadium, nickel, chromium, tungsten and a combination thereof.

46. The article of claim 1, wherein the abrasive grains comprise not greater than about 40 vol % of the total volume of the bonded abrasive article.

5. (canceled)

7-8. -8. (canceled)

10-15. -15. (canceled)

18-26. -26. (canceled)

28-33. -33. (canceled)

37. (canceled)

39-40. -40. (canceled)

42-45. -45. (canceled)

47-48. -48. (canceled)

49. A tool comprising:

a bonded abrasive article comprising;

a metal bond material;

abrasive grains contained within the metal bond material;

a reaction agent dispersed within the metal bond material, wherein the reaction agent comprises an oxide material for chemically reacting with the surface of the workpiece during abrasion to form a reaction product.

51. The article of claim 49, wherein the bond material comprises an amount of the reaction agent within a range between about 1 wt % and about 5 wt %.

52. The article of claim 49, wherein the reaction agent is a particulate material dispersed within the bond material, the reaction agent particulate material having an average primary particle size of not greater than about 100 microns.

53. The article of claim 49, wherein the reaction agent is a particulate material having porosity within the particles.

50. (canceled)

54-59. -59. (canceled)

60. A method for grinding a workpiece comprising:

providing a workpiece comprising alumina;

abrading a surface of the workpiece using a bonded abrasive article comprising;

a bond material comprising metal;

abrasive grains contained within the bond material; and

a reaction agent dispersed within the bond material; and

chemically reacting the workpiece with the reaction agent to form a reaction compound at the surface of the workpiece during abrading.

61-73. -73. (canceled)