US4654232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the formation of a titanium or zirconium compound coating
Assignee: Toshiba Corp
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Filing: 1986-06-02
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Granted: 1987-03-31
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Expires: 2006-06-02
Abstract
Abstract A method for forming on the surface of a sintered article of silicon nitride type ceramic a coating film of a compound containing titanium or zirconium is disclosed. This metal compound coating is easily and inexpensively obtained by placing a metal-containing substance such as, for example, titanium dioxide in contact with a sintered article of silicon nitride type ceramic and sintering the resultant composite in a non-oxidative atmosphere.
Inventors
- 👤 Akio Sayano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:45
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/5133; C04B41/80; C04B41/81; C04B41/85; C04B41/88
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
A method for the formation of a coating of a titanium or zirconium nitride on the surface of a sintered silicon nitride ceramic article, characterized by the steps of depositing a coating of titanium or zirconium or a substance containing titanium or zirconium on the surface of said sintered ceramic article and sintering the resultant composite in a non-oxidative atmosphere to produce a reaction between the surface and the coating to form said coating of titanium or zirconium nitride.
Claim 2
Independent Claim
79 words
A method for the formation of a coating of a titanium or zirconium nitride on the surface of a sintered silicon nitride ceramic article, characterized by the steps of depositing a coating of titanium or zirconium or a substance containing titanium or zirconium on the surface of said sintered ceramic article and sintering the resultant composite in a non-oxidative atmosphere to produce a reaction between the surface and the coating to form said coating of titanium or zirconium nitride.
Claim 3
Dependent Claim
23 words
A method according to claim 1, wherein said substance to be placed in contact with said sintered silicon nitride ceramic article contains titanium.
Claim 4
Dependent Claim
14 words
A method according to claim 2, wherein said substance containing titanium is titanium dioxide.
Claim 5
Independent Claim
24 words
A method according to any of claims 1-3, wherein said non-oxidative atmosphere is formed of a mixed gas of nitrogen or argon and hydrogen.
References Cited (Backward Citations)
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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) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |