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US4685607A
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Nitride ceramic-metal complex material and method of producing the same
Assignee: Toshiba Corp
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Filing: 1985-05-17
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Granted: 1987-08-11
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Expires: 2005-05-17
Abstract
Abstract A method of forming a nitride ceramic-metal complex material without using a special bonding material. This method comprises bringing a metallic material into contact with the surface of a nitride ceramic material, heating under vacuum the nitride ceramic material so as to dissociate the surface of the nitride ceramic material into nitrogen and a precursor of the ceramic material, thereby allowing the dissociated precursor to react with the metallic material and to achieve bonding between the nitride ceramic material and the metallic material. A nitride ceramic-metal complex material produced by the above method is also proposed.
Inventors
- 👤 Hiromitsu Takeda
- 👤 Masako Nakahashi
- 👤 Makoto Shirokane
- 👤 Akihiko Tsuge
- 👤 Takao Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:54
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/645; C04B37/00; C04B37/003; C04B37/006; C04B37/02; C04B37/021; C04B37/023; C04B37/026; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/51; C04B41/5144; C04B41/80; C04B41/81; C04B41/85; C04B41/88; C04B2235/00; C04B2235/65; C04B2235/656; C04B2235/6562; C04B2235/658; C04B2235/6581; C04B2237/00; C04B2237/02; C04B2237/12; C04B2237/123; C04B2237/126; C04B2237/30; C04B2237/32; C04B2237/36; C04B2237/368; C04B2237/40; C04B2237/405; C04B2237/406; C04B2237/50; C04B2237/58; C04B2237/60; C04B2237/70; C04B2237/708; C04B2237/76
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
113 words
A method of producing a nitride ceramic-metal complex material, comprising the steps of: bringing a metallic material selected from the group consisting of a metal rich in reactivity with a precursor to nitride and an alloy of said metal into contact with the surface of a nitride ceramic material; and heating under vacuum the nitride ceramic material which is kept in contact with the metallic material so as to dissociate the surface of the nitride ceramic material into nitrogen and a precursor to nitride, thereby alloying the dissociated precursor to nitride to react with the metal or alloy thereof so as to achieve bonding between the nitride ceramic material and the metallic material.
Claim 2
Independent Claim
113 words
A method of producing a nitride ceramic-metal complex material, comprising the steps of: bringing a metallic material selected from the group consisting of a metal rich in reactivity with a precursor to nitride and an alloy of said metal into contact with the surface of a nitride ceramic material; and heating under vacuum the nitride ceramic material which is kept in contact with the metallic material so as to dissociate the surface of the nitride ceramic material into nitrogen and a precursor to nitride, thereby alloying the dissociated precursor to nitride to react with the metal or alloy thereof so as to achieve bonding between the nitride ceramic material and the metallic material.
Claim 3
Dependent Claim
17 words
The method according to claim 1, wherein the nitride ceramic material is a silicon nitride ceramic material.
Claim 4
Dependent Claim
13 words
The method according to claim 1, wherein the nitride ceramic material is SiAlON.
Claim 5
Dependent Claim
34 words
The method according to claim 1, wherein the metallic material has a melting point higher than that of at least one of the reaction products between the precursor to nitride and the metallic material.
Claim 6
Dependent Claim
23 words
The method according to claim 1, wherein the metallic material is powdery and has a particle diameter of not more than 100 μm.
Claim 7
Dependent Claim
24 words
The method according to claim 1, wherein the metallic material is in the form of wires having a diameter of 50 μm or less.
Claim 8
Dependent Claim
16 words
The method according to claim 1, wherein the metallic material is in the form of foils.
Claim 9
Dependent Claim
16 words
The method according to claim 1, wherein the metallic material is in the form of blocks.
Claim 10
Dependent Claim
30 words
The method according to claim 8, wherein a buffer layer consisting of a metal and a ceramic material is formed on the surface of the block of the metallic material.
Claim 11
Dependent Claim
33 words
The method according to claim 9, wherein the ceramic material concentration of the buffer layer is gradually increased from the region in direct contact with the metallic material toward the nitride ceramic material.
Claim 12
Dependent Claim
26 words
The method according to claim 10, wherein the bufer layer is formed by flame spraying of a mixture consisting of a metal and a ceramic material.
Claim 13
Dependent Claim
21 words
The method according to claim 1, wherein the heating is carried out under a vacuum of 10 -3 Torr or less.
Claim 14
Dependent Claim
20 words
The method according to claim 1, wherein the heating temperature is lower than the melting point of the metallic material.
Claim 15
Dependent Claim
16 words
The method according to claim 1, wherein the highest heating temperature is 1,200° C. or more.
Claim 16
Dependent Claim
31 words
The method according to claim 1, wherein the heat treatment is carried out under a vacuum of 10 -3 Torr or less and the highest temperature of 1,200° C. or more.
References Cited (Backward Citations)
US2957238A
Cited
FR1596904A
Cited
US3628233A
Cited
US4324356A
Cited
US4456577A
Cited
US4492737A
Cited
JPS59107984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |