Claims
- 1. A composite multilayer material for plain bearing comprising:a metallic backing layer; a bearing metal layer; a diffusion barrier layer, and an electroplated overlay, said bearing characterized by said bearing metal layer being selected from a group of alloys consisting of: Cu—Al, Cu—Zn, Cu—Zn—Si, Cu—Zn—Al and Cu—Al—Fe; and said bearing metal layer being formed of a lead free copper alloy having a copper content in the range of about 50 to 95 wt. % and said overlay being formed of a lead-free Sn—Cu alloy having copper in the range of about 3 to 20 wt. % and tin in the range of about 70 to 97 wt. %.
- 2. The material of claim 1 wherein said overlay includes at least one component selected from the group of materials consisting of: bismuth, silver and nickel in a proportion ≦20 wt. %.
- 3. The material of claim 1 wherein said overlay includes a dispersion of hard particles selected from a group of particles consisting of: Al2O3, Si3N4, diamond, TiO2, and SiC.
- 4. The material of claim 1 wherein said diffusion barrier layer comprises nickel.
- 5. The material of claim 1 wherein said diffusion barrier layer comprises a nickel layer having a thickness of about 1 to 3 μm and a nickel-tin layer having a thickness of about 2 to 10 μm.
- 6. The material of claim 1 wherein said diffusion barrier layer comprises a cobalt layer having a thickness of about 1 to 3 μm.
- 7. A multilayer plain bearing comprising:a metallic backing layer, a bearing metal layer, a diffusion barrier layer, and an electroplated overlay, said bearing characterized by said bearing metal layer selected from a group of alloys consisting of Cu—Al, Cu—Zn, Cu—Zn—Si, Cu—Zn—Al, and Cu—Al—Fe; said bearing metal layer being formed of a lead-free copper alloy having a copper content in the range of about 50 to 95 wt. % and said overlay being formed of a lead-free Sn—Cu alloy having copper in the range of about 3 to 20 wt. % and tin in the range of about 70 to 97 wt. %.
- 8. The bearing of claim 7 wherein said overlay includes at least one component selected from the group of materials consisting of: bismuth, silver and nickel in a proportion ≦20 wt. %.
- 9. The bearing of claim 7 wherein said overlay includes a dispersion of hard particles selected from a group of particles consisting of: Al2O3, Si3N4, diamond, TiO2, and SiC.
- 10. The bearing of claim 7 wherein said diffusion barrier layer comprises nickel.
- 11. The bearing of claim 7 wherein said diffusion barrier layer comprises a nickel layer having a thickness of about 1 to 3 μm and a nickel-tin layer having a thickness of about 2 to 10 μm.
- 12. The bearing of claim 7 wherein said diffusion barrier layer comprises a cobalt layer having a thickness of about 1 to 3 μm.
Priority Claims (1)
Number |
Date |
Country |
Kind |
197 28 777 |
Jul 1997 |
DE |
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Parent Case Info
This application is a continuation of application Ser. No. 09/108,785, filed Jul. 2 1998, now abandoned the priority of which is claimed.
US Referenced Citations (7)
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Oct 1950 |
DE |
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Non-Patent Literature Citations (1)
Entry |
Glyco Ingenieurberichte 1/91 Hochleistungsfahige metallische Mehrschicht-Verbundwerkstoffe fur Gleitlager. |
Continuations (1)
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Number |
Date |
Country |
Parent |
09/108785 |
Jul 1998 |
US |
Child |
09/993806 |
|
US |