Patent US5180533A successfully refreshed from Google Patents.
US5180533A
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US
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Method for production of sintered ceramic article containing titanium diboride and silicon carbide
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1991-09-19
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Granted: 1993-01-19
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Expires: 2011-09-19
Abstract
Abstract A sintered article having a matrix of titanium diboride and a dispersed reinforcing phase of silicon carbide is produced by mixing titanium diboride powder and silicon carbide powder or whiskers, combining the resultant mixture with silicon boride, and sintering the produced mixture in a non-oxidative atmosphere under a pressure of at least 300 kg/cm2 at a temperature of at least 1,300 DEG C.
Inventors
- 👤 Akira Kamiya
- 👤 Kikuo Nakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:13
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/622; C04B35/64; C04B35/645; C04B35/71; C04B35/78; C04B35/80; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
134 words
A method for the production of a high-strength sintered ceramic article having a matrix of titanium diboride and a dispersed reinforcing phase of silicon carbide and containing boron carbide and silicon, by heating and pressing, which method consists essentially of mixing titanium diboride powder and at least one silicon carbide selected from the group consisting of silicon carbide whiskers and silicon carbide powder in an amount in the range of from 5 to 30% by volume, based on the total amount of titanium diboride and silicon carbide, combining the resultant mixture with 1 to 10% by weight, based on the amount of said resultant mixture, of silicon boride and sintering the resultant combination in a non-oxidative atmosphere under a pressure of at least 300 kg/cm 2 at a temperature of at least 1,300° C.
Claim 2
Independent Claim
134 words
A method for the production of a high-strength sintered ceramic article having a matrix of titanium diboride and a dispersed reinforcing phase of silicon carbide and containing boron carbide and silicon, by heating and pressing, which method consists essentially of mixing titanium diboride powder and at least one silicon carbide selected from the group consisting of silicon carbide whiskers and silicon carbide powder in an amount in the range of from 5 to 30% by volume, based on the total amount of titanium diboride and silicon carbide, combining the resultant mixture with 1 to 10% by weight, based on the amount of said resultant mixture, of silicon boride and sintering the resultant combination in a non-oxidative atmosphere under a pressure of at least 300 kg/cm 2 at a temperature of at least 1,300° C.
Claim 3
Dependent Claim
38 words
A method according to claim 1, wherein said silicon carbide whiskers have an average particle diameter in the range of from 0.1 to 1 μm and an average length in the range of from 10 to 100 μm.
Claim 4
Dependent Claim
41 words
A method according to claim 2, wherein the average particle diameter of said silicon carbide whiskers is in the range of from 0.5 to 1 μm and the average length thereof is in the range of from 50 to 100 μm.
Claim 5
Dependent Claim
19 words
A method according to claim 1, wherein said titanium diboride powder has a maximum particle diameter of 3 μm.
Claim 6
Dependent Claim
23 words
A method according to claim 1, wherein the particle diameter of said silicon carbide powder is smaller than that of titanium diboride powder.
Claim 7
Dependent Claim
27 words
A method according to claim 5, wherein the particle diameter of said silicon carbide powder is not more than 1/10 of that of said titanium diboride powder.
Claim 8
Dependent Claim
22 words
A method according to claim 1, wherein the particle diameter of said silicon boride is smaller than that of said silicon carbide.
Claim 9
Dependent Claim
14 words
A method according to claim 1, wherein said resultant combination is homogenized before sintering.
Claim 10
Dependent Claim
18 words
A method according to claim 1, wherein the mixing and combining are carried out in an organic solvent.
Claim 11
Dependent Claim
32 words
A method according to claim 1, wherein the mixing and combining are carried out in an organic solvent including at least one member selected from the group consisting of surfactants and electrolytes.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-19 | 1996-07-20 | 1997-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-19 | 2000-07-20 | 2001-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-19 | 2004-07-20 | 2005-01-19 | $7700.00 | Window Closed / Lapsed |