Claims
- 1. A method for applying a functionally gradient coating on a component, said component having a surface being subjected to one or more of rolling, sliding, abrasion and bending contacts, comprising the step of:
- thermally spraying a functionally gradient material (FGM) on said surface forming an FGM coating, said FGM coating having a thickness, a plurality of material compositions, and a plurality of elastic modulus profiles, said elastic modulus profiles consisting of a plurality of elastic modulii at a plurality of corresponding points within said thickness and said elastic modulii being in the range of from about 28 Mpsi to about 60 Mpsi.
- 2. A method for applying a functionally gradient coating on a component, said component having a surface and subjected to one or more of rolling, sliding, abrasion and bending contacts, comprising the step of:
- thermally spraying a functionally gradient material (FGM) on said surface that forms an FGM coating, said FGM coating having a thickness, a plurality of material compositions, and a plurality of elastic modulus profiles, said elastic modulus profiles consisting of:
- a first elastic modulus profile in a range from about 28 Mpsi to about 45 Mpsi from said surface of the coating to about 15% of said coating thickness as measured from said surface of said coating;
- a second elastic modulus profile in a range from about 35 Mpsi to about 45 Mpsi from about 15% to about 65% of said coating thickness as measured from said surface of said coating;
- a third elastic modulus profile in a range from about 45 Mpsi to about 28 Mpsi from about 65% to about 85% of said coating thickness as measured from said surface of said coating; and
- a fourth elastic modulus profile in a range from about 32 Mpsi to about 28 Mpsi from about 85% to about 100% of said coating thickness as measured from said surface of said coating.
- 3. A method, as defined in claim 2, wherein said first elastic modulus profile is lower at said surface of the coating than at about 15% of said coating thickness as measured from said surface of said coating.
- 4. A method, as defined in claim 2, wherein said third elastic modulus profile is higher at about 65% of said coating thickness as measured from said surface of said coating to about 85% of said coating thickness as measured from said surface of said coating.
- 5. A method, as defined in claim 2, wherein said component is a bearing.
- 6. A method, as defined in claim 2, wherein said component is a camshaft for an internal combustion engine.
- 7. A method, as defined in claim 2, wherein said component is a gear.
- 8. A method for applying a functionally gradient coating on a component, said component having a surface and subjected to abrasion and bending contacts, comprising the step of:
- thermally spraying a functionally gradient material (FGM) on said surface that forms an FGM coating, said FGM coating having a thickness, a plurality of material compositions, a plurality of elastic modulus profiles and a plurality of carbon content profiles, said elastic modulus profiles and carbon content profiles consisting of:
- a first elastic modulus profile in a range from about 28 Mpsi to about 45 Mpsi and a first carbon content profile in a range from about 0.75% to about 0.95% weight carbon, from said surface of the coating to about 15% of said coating thickness as measured from said surface of said coating;
- a second elastic modulus profile in a range from about 35 Mpsi to about 45 Mpsi and a second carbon content profile in a range from about 0.95% to about 0.35% weight carbon, from about 15% to about 65% of said coating thickness as measured from said surface of said coating;
- a third elastic modulus profile in a range from about 45 Mpsi to about 28 Mpsi and a third carbon content profile in a range from about 0.5% to about 0.1% weight carbon, from about 65% to about 85% of said coating thickness as measured from said surface of said coating; and
- a fourth elastic modulus profile in a range from about 32 Mpsi to about 28 Mpsi and a fourth carbon content profile in a range from about 0.35% to about 0.1% weight carbon, from about 85% to about 100% of said coating thickness as measured from said surface of said coating.
- 9. The method, as defined in claim 8, wherein said first elastic modulus profile is lower at said surface of the coating than at about 15% of said coating thickness as measured from said surface of said coating.
- 10. The method, as defined in claim 8, wherein said third elastic modulus profile is higher at about 65% of said coating thickness as measured from said surface of said coating to about 85% of said coating thickness as measured from said surface of said coating.
- 11. A method for applying a functionally gradient coating on a component, said component having a surface and subjected to at least abrasion contacts, comprising the step of:
- thermally spraying a functionally gradient material (FGM) on said surface that forms an FGM coating, said FGM coating having a thickness, a plurality of material compositions, and a plurality of elastic modulus profiles, said elastic modulus profiles consisting of:
- a first elastic modulus profile in a range from about 30 Mpsi to about 60 Mpsi from said surface of the coating to about 15% of said coating thickness as measured from said surface of said coating;
- a second elastic modulus profile in a range from about 30 Mpsi to about 60 Mpsi from about 15% to about 65% of said coating thickness as measured from said surface of said coating;
- a third elastic modulus profile in a range from about 45 Mpsi to about 30 Mpsi from about 65% to about 85% of said coating thickness as measured from said surface of said coating; and
- a fourth elastic modulus profile in a range from about 32 Mpsi to about 30 Mpsi from about 85% to about 100% of said coating thickness as measured from said surface of said coating.
- 12. The method, as defined in claim 11, wherein said component is a track roller for the track of an earthworking machine.
- 13. The method, as defined in claim 11, wherein said component is a track link for the track of an earthworking machine.
- 14. The method, as defined in claim 11, wherein said component is a ground engaging tool for an earthworking machine.
- 15. The method, as defined in claim 11, wherein said component is a track shoe for the track of an earthworking machine.
- 16. The method, as defined in claim 11, wherein said component is a track bushing for the track of an earthworking machine.
- 17. The method, as defined in claim 11, wherein said component is a gear.
Parent Case Info
This application is a continuation-in-part of application Ser. No. 08/720,845, filed Oct. 3, 1996, now abandoned, which is a divisional of Ser. No. 08/658,332, filed Jun. 5, 1996 (now abandoned).
Government Interests
The Government has the rights in this invention pursuant to Contract No. 70NANB4H1414 awarded by NIST.
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Non-Patent Literature Citations (3)
Entry |
Application: Advanced Thermal Spray Coatings for Corrosion and Wear Resistance, Tucker, Jr. & Ashary, Praxair Surface Technologies, Inc. (no month date) 1995. |
Article: MRS Bulletin/Jan. 1995 Thermal Spray Processing of FGMs, S.Sampath, H. Herman, N. Shimoda, & T. Saito. |
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Divisions (1)
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Number |
Date |
Country |
Parent |
658332 |
Jun 1996 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
720845 |
Oct 1996 |
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