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US4346123A
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US
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Method of depositing hard wear-resistant coatings on substrates
Assignee: OC Oerlikon Balzers AG
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Filing: 1980-08-01
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Granted: 1982-08-24
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Expires: 2000-08-01
Abstract
Abstract A method of depositing hard, wear-resistant coatings on workpieces and utility articles by evaporating a metal such as titanium in a reactive atmosphere. To make the coating hard as far as possible, wear resistant, and less susceptible to oxidation, the deposition is effected in an atmosphere containing nitrogen, oxygen and carbon, with the atomic number proportion of O to C ranging between 0.5 and 1.5. An evaporation by means of a low voltage arc discharge and the use of CO as the residual gas atmosphere are particularly advisable.
Inventors
- 👤 Helmut Kaufmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:44
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/0021
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
A method of depositing a hard wear-resistant coating onto a substrate comprising: evaporating a metal in a nitrogen containing residual gas atmosphere to form the coating on the substrate; and simultaneously forming an electric gas discharge in the atmosphere to activate the residual gas; wherein the atmosphere simultaneously contains nitrogen, oxygen and carbon with the atomic number proportion of oxygen to carbon being between about 0.5 to 1.5; and wherein the metal is selected from the group which consists of titanium, zirconium and hafnium.
Claim 2
Independent Claim
84 words
A method of depositing a hard wear-resistant coating onto a substrate comprising: evaporating a metal in a nitrogen containing residual gas atmosphere to form the coating on the substrate; and simultaneously forming an electric gas discharge in the atmosphere to activate the residual gas; wherein the atmosphere simultaneously contains nitrogen, oxygen and carbon with the atomic number proportion of oxygen to carbon being between about 0.5 to 1.5; and wherein the metal is selected from the group which consists of titanium, zirconium and hafnium.
Claim 3
Dependent Claim
14 words
A method according to claim 1, wherein the residual gas atmosphere contains carbon monoxide.
Claim 4
Dependent Claim
32 words
A method according to claim 1, including applying a biasing voltage to the substrate, the metal and a cathode to produce a low voltage electric arc discharge in the residual gas atmosphere.
Claim 5
Dependent Claim
12 words
A method according to claim 1, including replacing the residual gas atmosphere.
References Cited (Backward Citations)
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Cited
US3988955A
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US3900592A
Cited
JPS527831A
Cited
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US4226082A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-23 | 1986-02-22 | 1986-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-23 | 1990-02-22 | 1990-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-23 | 1994-02-22 | 1994-08-24 | $7700.00 | Window Closed / Lapsed |