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US4948425A
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Titanium carbo-nitride and chromium carbide-based ceramics containing metals
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1989-04-06
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Granted: 1990-08-14
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Expires: 2009-04-06
Abstract
Abstract New ceramics have excellent mechanical properties such as high density, strength, hardness and toughness. The new ceramics are prepared by sintering a mixture prepared by adding 1 to 90 percent by weight of chromium carbide to titanium carbo-nitride together with some elements selected from the group of transition metals of groups IV, V, VI and VII, ferrous metals and semi-metals. For some types of new ceramics, boron carbide is added, too.
Inventors
- 👤 Tadahiko Watanabe
- 👤 Tsuyoshi Doutsu
- 👤 Osamu Yagishita
- 👤 Hideki Yamamoto
- 👤 Yukio Kai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:05
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/645; C04B35/515; C04B35/56; C04B35/58; C04B35/58007; C04B35/58014; C04B35/58021; C22; C22C; C22C29/00; C22C29/02; C22C29/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
76 words
A titanium carbo-nitride and chromium carbide-based ceramic containing metals prepared by sintering a powder mixture obtained by adding 0.05 to 40 percent by weight of one or more elements selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, and silicon to a basic component that consists of titanium carbo-nitride containing different ratios of carbon and nitrogen and 1 to 30 percent by weight of chromium carbide.
Claim 2
Dependent Claim
76 words
A titanium carbo-nitride and chromium carbide-based ceramic containing metals prepared by sintering a powder mixture obtained by adding 0.05 to 40 percent by weight of one or more elements selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, manganese, iron, cobalt, nickel, and silicon to a basic component that consists of titanium carbo-nitride containing different ratios of carbon and nitrogen and 1 to 30 percent by weight of chromium carbide.
Claim 3
Dependent Claim
85 words
A titanium carbide-nitride and chromium carbide-based ceramic containing metals prepared by sintering a powder mixture prepared by adding to 0.1 to 5 percent by weight of boron carbide to a basic component that consists of titanium carbo-nitride containing different ratios of carbon and nitride, 1 to 30 percent by weight of chromium carbide, 0.05 to 40 percent by weight of one or more elements selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungten, manganese, iron, cobalt, nickel, and silicon.
Claim 4
Dependent Claim
85 words
A titanium carbide-nitride and chromium carbide-based ceramic containing metals prepared by sintering a powder mixture prepared by adding to 0.1 to 5 percent by weight of boron carbide to a basic component that consists of titanium carbo-nitride containing different ratios of carbon and nitride, 1 to 30 percent by weight of chromium carbide, 0.05 to 40 percent by weight of one or more elements selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungten, manganese, iron, cobalt, nickel, and silicon.
Claim 5
Dependent Claim
30 words
A titanium carbo-nitride and chromium carbide-based ceramic according to claim 1 or 2, in which the titanium carbo-nitride contains carbon and nitrogen by a ratio of between 10:90 and 90:10.
Claim 6
Dependent Claim
30 words
A titanium carbo-nitride and chromium carbide-based ceramic according to claim 1 or 2, in which the powder of titanium carbo-nitride consists of grains averaging 2 μm and under in size.
Claim 7
Dependent Claim
53 words
A titanium carbo-nitride and chromium carbide-based ceramic according to claim 1 or 2, in which the chromium carbide consists of one or more compounds selected from the group consisting of Cr 3 C 2 , Cr 23 C 6 and Cr 7 C 3 and having a mean grain size of 2 μm.
Claim 8
Dependent Claim
20 words
The titanium carbo-nitride and chromium carbide-based ceramic of claim 4, wherein said grains average 1 μm and under in size.
Claim 9
Dependent Claim
25 words
The titanium carbo-nitride and chromium carbide-based ceramic of claim 5, wherein said mean grain size have an average grain size of 1 μm and under.
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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |