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US5102835A
Expired / Lapsed
US
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Metal boride ceramic material
Assignee: Coorstek KK
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Filing: 1990-12-05
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Granted: 1992-04-07
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Expires: 2010-12-05
Abstract
Abstract A sintered metal boride ceramic body manufactured by mixing 75-99 wt. % of TiB 2 powder with 1-25 wt. % in total of Ni powder and C powder to thereby make a mixture, shaping the mixture together with a binder to thereby make a shaped ceramic body, and firing the shaped ceramic body in a non-oxidizing atmosphere.
Inventors
- 👤 Hajime Saito
- 👤 Hideo Nagashima
- 👤 Junichi Matsushita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/56; C04B35/5607; C04B35/5611; C04B35/58071; C04B35/622; C04B35/626; C04B35/63; C04B35/632; C04B35/634; C04B35/63404; C04B35/63416
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
111 words
A method for producing a sintered metal boride ceramic body, said method comprising: mixing 75-99 wt. % of TiB 2 powder with 1-25 wt. % in total of Ni powder and C powder to thereby make a mixture; shaping said mixture together with a binder to thereby make a shaped ceramic body; and firing the shaped ceramic body in a non-oxidizing atmosphere to react the Ni powder and the C powder with a portion of the TiB 2 powder to form nickel boride and titanium carbide matrix containing dispersed TiB 2 particles, in accordance with at least one of the following equations: TiB.sub.2 +2Ni+C→2NiB+TiC; TiB.sub.2 +Ni+C→NiB.sub.2 +TiC; and TiB.sub.2 +6Ni+C→2Ni.sub.3 B+TiC.
Claim 2
Independent Claim
111 words
A method for producing a sintered metal boride ceramic body, said method comprising: mixing 75-99 wt. % of TiB 2 powder with 1-25 wt. % in total of Ni powder and C powder to thereby make a mixture; shaping said mixture together with a binder to thereby make a shaped ceramic body; and firing the shaped ceramic body in a non-oxidizing atmosphere to react the Ni powder and the C powder with a portion of the TiB 2 powder to form nickel boride and titanium carbide matrix containing dispersed TiB 2 particles, in accordance with at least one of the following equations: TiB.sub.2 +2Ni+C→2NiB+TiC; TiB.sub.2 +Ni+C→NiB.sub.2 +TiC; and TiB.sub.2 +6Ni+C→2Ni.sub.3 B+TiC.
Claim 3
Dependent Claim
16 words
The method of claim 1, wherein the weight ratio of Ni/C is from 7:0.1 to 7:10.
Claim 4
Dependent Claim
75 words
The method of claim 1, wherein the average diameter of the TiB 2 powder is 0.5 to 8 microns; the maximum diameter of the TiB 2 powder is 12 microns; the average diameter of the Ni powder is 1 to 5 microns; the maximum diameter of the Ni powder is 12 microns; the average diameter of the C powder is 10 to 100 nanometers; and the maximum diameter of the C powder is 150 nanometers.
Claim 5
Dependent Claim
22 words
The method of claim 1, wherein the specific surface area of the C powder ranges between 50 and 150 m 2 /g.
Claim 6
Dependent Claim
16 words
The method of claim 1, wherein said firing is at a temperature of 1500° C.-2000° C.
Claim 7
Dependent Claim
16 words
The method of claim 4, wherein said firing is at a temperature of 1600° C.-1800° C.
References Cited (Backward Citations)
US4379852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-04-07 | 1995-10-07 | 1996-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-07 | 1999-10-07 | 2000-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-07 | 2003-10-07 | 2004-04-07 | $7700.00 | Window Closed / Lapsed |