Patent US4787396A successfully refreshed from Google Patents.
US4364969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating titanium and its alloys
Assignee: Ricardo AEA Ltd
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Filing: 1980-12-08
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Granted: 1982-12-21
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Expires: 2000-12-08
Abstract
Abstract A process for improving the wear resistance of, and reducing the frictional forces between, bodies made of titanium or its alloys, in which surfaces liable to wear are coated with a layer of a metal such as tin of aluminium which is then bombarded with ions of a light species such as nitrogen, carbon, boron, or neon so as to cause the metal to migrate into the titanium.
Inventors
- 👤 Geoffrey Dearnaley
- 👤 Robert E. J. Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:43
CPC Classifications
C; C23; C23C; C23C10/00; Y; Y10; Y10S; Y10S148/00; Y10S148/902; Y10S148/903; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
103 words
A process for improving the wear resistance of titanium and its alloys comprising the operations of coating a surface of a workpiece made of titanium or an alloy of titanium and which is likely to be subject to wear with a layer of a metal selected from the group consisting of aluminium, copper, iron, tin, nickel, platinum, zinc and zirconium, and then subjecting the coated surface to bombardment with ions of a light species the mass of which is insufficient to cause a harmful degree of sputtering of the surface during implantation, so as to cause the metal to migrate into the workpiece.
Claim 2
Dependent Claim
103 words
A process for improving the wear resistance of titanium and its alloys comprising the operations of coating a surface of a workpiece made of titanium or an alloy of titanium and which is likely to be subject to wear with a layer of a metal selected from the group consisting of aluminium, copper, iron, tin, nickel, platinum, zinc and zirconium, and then subjecting the coated surface to bombardment with ions of a light species the mass of which is insufficient to cause a harmful degree of sputtering of the surface during implantation, so as to cause the metal to migrate into the workpiece.
Claim 3
Dependent Claim
13 words
A process according to claim 1 wherein the metal is tin or aluminium.
Claim 4
Dependent Claim
32 words
A process according to claim 1 or claim 2 wherein the bombarding ion species is selected from the group comprising N + , B + , C + and Ne + .
Claim 5
Dependent Claim
15 words
A process according to claim 3 wherein the light ion species is N + .
Claim 6
Dependent Claim
35 words
A process according to claim 1 wherein the bombardment with the light ion species is continued until a dose of the order of 10 17 ions per cm 2 has been implanted into the workpiece.
Claim 7
Dependent Claim
29 words
A process according to claim 1 wherein the temperature of the workpiece is raised to at least 400° C. while it is being bombarded with the light ion species.
Claim 8
Dependent Claim
17 words
A process according to claim 6 wherein the temperature of the workpiece is raised to 600° C.
Claim 9
Dependent Claim
39 words
A process according to claim 6 or claim 7 wherein the bombardment with the light ion species is carried out at a power level such as to cause the temperature of the workpiece to rise to the specified level.
Claim 10
Dependent Claim
33 words
A process according to claim 8 wherein the workpiece is bombarded with a beam of ions having an energy of 400 kev and a current density of 30 μA per cm 2 .
Claim 11
Dependent Claim
17 words
A process according to claim 1 wherein the coating is by electron beam evaporation in a vacuum.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |