US4716083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disordered coating
Assignee: Bodycote Metallurgical Coatings Inc
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Filing: 1983-09-23
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Granted: 1987-12-29
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Expires: 2003-09-23
Abstract
Abstract A coating and method of depositing it is provided. The wear resistant coating comprises a thin layer of disordered boron and carbon applied to a substrate. The coating has good adherence and provides good resistance to wear so that it is useful as a tool coating. In a more specific embodiment, the coating is disordered boron carbide. The coating can have a high gloss and can also be used as a decorative coating. The coating can be made by sputtering boron and carbon onto a substrate. A bias voltage may be applied to the substrate during sputtering. In accordance with one embodiment, the disordered boron and carbon coating is of a composition B x C 1-x where x is from about 0.60 to about 0.90.
Inventors
- 👤 Erwin Eichen
- 👤 James D. Flasck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:00
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C30/00; A; A61; A61C; A61C3/00; A61C3/02; C23C14/0635
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
53 words
An article comprising: a substrate; and a coating applied to at least a portion of the substrate, the coating comprising a layer adherent to the substrate and consisting of disordered boron and carbon, said layer of disordered boron and carbon formed by sputtering under sputtering conditions to provide said disorder and said adherence.
Claim 2
Dependent Claim
53 words
An article comprising: a substrate; and a coating applied to at least a portion of the substrate, the coating comprising a layer adherent to the substrate and consisting of disordered boron and carbon, said layer of disordered boron and carbon formed by sputtering under sputtering conditions to provide said disorder and said adherence.
Claim 3
Dependent Claim
14 words
The article of claim 1 wherein said layer is formed by dc magnetron sputtering.
Claim 4
Dependent Claim
18 words
The article of claim 1 wherein at least a portion of the layer is formed by bias sputtering.
Claim 5
Dependent Claim
28 words
The article of claim 1 wherein said layer is formed by dc magnetron sputtering with a bias voltage being utilized during at least a portion of said sputtering.
Claim 6
Dependent Claim
14 words
The article of claim 1 wherein said disordered boron and carbon comprises amorphous material.
Claim 7
Dependent Claim
14 words
The article of claim 1 wherein said disordered boron and carbon comprises polycrystalline material.
Claim 8
Dependent Claim
14 words
The article of claim 1 wherein said disordered boron and carbon comprises microcrystalline material.
Claim 9
Dependent Claim
13 words
The article of claim 1 wherein said boron and carbon is substantially amorphous.
Claim 10
Dependent Claim
12 words
The article of claim 1 wherein said layer comprises disordered boron carbide.
Claim 11
Dependent Claim
29 words
The article of claim 1 wherein said layer has a composition on an atomic basis of B x C 1-x where x is from about 0.60 to about 0.90.
Claim 12
Dependent Claim
11 words
The article of claim 10 wherein said layer is substantially amorphous.
Claim 13
Dependent Claim
22 words
The article of claim 1 wherein the thickness of the layer is in the range from about 0.20 to about 8 micrometers.
Claim 14
Dependent Claim
11 words
The article of claim 1 wherein said substrate comprises carbide material.
Claim 15
Dependent Claim
10 words
The article of claim 1 wherein said substrate comprises steel.
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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) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |