Claims
- 1. A method for reducing fretting wear between contacting surfaces at a temperature from about 1000.degree. F. to about 1250.degree. F., said method comprising applying to at least one of said contacting surfaces a coating consisting essentially of from about 88 to about 96 weight percent copper, from about 4 to about 8 weight percent aluminum, and from 0 to about 4 weight percent silicon, placing said surfaces in contact, and causing relative movement between said surfaces at said temperature.
- 2. The method of claim 1, wherein said contacting surfaces are of a metal selected from the group consisting of nickel, cobalt, and titanium alloys.
- 3. The method of claim 2, wherein said coating is deposited by physical vapor deposition, and is from about 0.1 to about 4 mils thick.
- 4. The method of claim 3, wherein said coating is from about 0.75 to about 1.5 mils thick.
- 5. The method of claim 4, wherein the surface is a nickel-base alloy.
- 6. The method of claim 5, wherein said coating consists essentially of about 92 weight percent copper and about 8 weight percent aluminum.
- 7. The method of claim 6, wherein said coating is applied by cathodic are deposition.
- 8. The method of claim 7, wherein said coating comprises about 92.5 weight percent copper and about 7.5 weight percent aluminum.
- 9. A method for transmitting forces between contacting components of a jet engine, said method comprising applying to the contacting surfaces of said components an anti-fretting coating consisting essentially of from about 88 to about 96 weight percent copper, from about 4 to about 8 weight percent aluminum, and from 0 to about 4 weight percent silicon, placing said coated surfaces in contact, and applying a force to one of said components at a temperature of from about 1000.degree. F. to about 1250.degree. F.
- 10. The method of claim 9, wherein said contacting components are of a metal selected from the group consisting of nickel, cobalt, and titanium alloys.
- 11. The method of claim 10, wherein said coating is deposited by physical vapor deposition, and is from about 0.1 to about 4 mils thick.
- 12. The method of claim 11, wherein said coating is from about 0.75 to about 1.5 mils thick.
- 13. The method of claim 12, wherein said component is a nickel-base alloy.
- 14. The method of claim 13, wherein said coating consists essentially of about 92 weight percent copper and about 8 weight percent aluminum.
- 15. The method of claim 12, wherein said coating consists essentially of 92.5 weight percent copper and about 7.5 weight percent aluminum.
- 16. A fretting-fatigue resistant compressor airfoil root for use at a temperature of from about 1000.degree. F. to about 1250.degree. F., comprising an airfoil root of a metal selected from the group consisting of nickel, cobalt, and titanium alloys, the surface thereof having a coating of an alloy consisting essentially of from about 88 to about 96 weight percent copper, from about 4 to about 8 weight percent aluminum, and from 0 to about 4 weight percent silicon, said coating being from about 0.1 to about 4 mils thick.
- 17. The airfoil root of claim 16, wherein said root is a nickel base alloy, and said coating consists essentially of about 92 weight percent copper and about 8 weight percent aluminum.
- 18. The airfoil root of claim 17, wherein said coating is from about 0.75 to about 1.5 mils thick.
- 19. The airfoil root of claim 16, wherein said coating consists essentially of about 92.5 weight percent copper and about 7.5 weight percent aluminum.
- 20. The airfoil root of claim 19, wherein said root comprises a nickel base alloy, and said coating is from about 0.75 to about 1.5 mils thick.
Parent Case Info
This is a continuation of Ser. No. 07/760,318, filed Sep. 16, 1991, now abandoned.
Government Interests
This invention was made under a U.S. Government contract and the Government has rights herein.
US Referenced Citations (11)
Foreign Referenced Citations (4)
Number |
Date |
Country |
3518021 |
Dec 1985 |
DEX |
49-37685 |
Oct 1974 |
JPX |
61-109021 |
May 1986 |
JPX |
389159 |
Jul 1973 |
SUX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
760318 |
Sep 1991 |
|