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US4910171A
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Titanium hafnium carbide-boride metal based ceramic sintered body
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1989-05-23
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Granted: 1990-03-20
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Expires: 2009-05-23
Abstract
Abstract The present invention is characterized by a ceramic sintered body consisting of (1) a primary mixed powder in which boride metal powder the MB2 type or M2B5 type (M indicates the metal) is mixed with a titanium hafnium carbide powder; (2) a secondary mixed powder in which titanium carbonitride is mixed with the above-mentioned primary mixed powder; or (3) a tertiary mixed powder or a quaternary mixed powder in which carbide powder such as hafnium carbide or zirconium carbide is mixed with above-mentioned primary mixed powder or the secondary mixed powder. The resulting sintered bodies have high hardness and toughness.
Inventors
- 👤 Tadahiko Watanabe
- 👤 Kazuhisa Shobu
- 👤 Hideki Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:52
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/64; C04B35/645; C04B35/515; C04B35/56; C04B35/5607; C04B35/5611; C04B35/5622; C04B35/5626; C04B35/58; C04B35/58007; C04B35/58014; C04B35/58021; C04B35/5805; C04B35/58057; C04B35/58064; C04B35/58071; C04B35/58078
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
134 words
A titanium hafnium carbide-boride metal-base ceramic sintered body for use as a cutting tool and mechanical member prepared by sintering a powdery mixture consisting essentially of: (a) a titanium hafnium carbide solid solution having a ratio of atomic weight of titanium to hafnium of from 99:1 to 1:99, and (b) from 5 to 95% by weight of at least one boride metal selected from the group consisting of TiB 2 , CrB 2 , TaB 2 , MnB 2 , MoB 2 , VB 2 , NbB 2 , HfB 2 , AlB 2 , ZrB 2 , W 2 B 5 and Mo 2 B 5 , said powdery mixture having a mean particle size of less than 2 μm and said ceramic sintered body having substantially no pores observable by electron microscope.
Claim 2
Dependent Claim
134 words
A titanium hafnium carbide-boride metal-base ceramic sintered body for use as a cutting tool and mechanical member prepared by sintering a powdery mixture consisting essentially of: (a) a titanium hafnium carbide solid solution having a ratio of atomic weight of titanium to hafnium of from 99:1 to 1:99, and (b) from 5 to 95% by weight of at least one boride metal selected from the group consisting of TiB 2 , CrB 2 , TaB 2 , MnB 2 , MoB 2 , VB 2 , NbB 2 , HfB 2 , AlB 2 , ZrB 2 , W 2 B 5 and Mo 2 B 5 , said powdery mixture having a mean particle size of less than 2 μm and said ceramic sintered body having substantially no pores observable by electron microscope.
Claim 3
Dependent Claim
156 words
A titanium hafnium carbide-boride metal-based ceramic sintered body for use as a cutting tool and mechanical member prepared by sintering a powdery mixture consisting essentially of: (a) a titanium hafnium carbide solid solution having a ratio of atomic weight of titanium to hafnium of from 99:1 to 1:99, (b) from 5 to 95% by weight of at least one boride metal selected from the group consisting of TiB 2 , CrB 2 , TaB 2 , MnB 2 , MoB 2 , VB 2 , NbB 2 , HfB 2 , AlB 2 , ZrB 2 , W 2 B 5 and Mo 2 B 5 , and (c) greater than 0% but less than 80% by weight of a TiC.sub.α N.sub.β powder wherein α:β ranges from 0:100 to 100:0, said powdery mixture having a mean particle size of less than 2 μm and said ceramic sintered body having substantially no pores observable by electron microscope.
Claim 4
Dependent Claim
156 words
A titanium hafnium carbide-boride metal-based ceramic sintered body for use as a cutting tool and mechanical member prepared by sintering a powdery mixture consisting essentially of: (a) a titanium hafnium carbide solid solution having a ratio of atomic weight of titanium to hafnium of from 99:1 to 1:99, (b) from 5 to 95% by weight of at least one boride metal selected from the group consisting of TiB 2 , CrB 2 , TaB 2 , MnB 2 , MoB 2 , VB 2 , NbB 2 , HfB 2 , AlB 2 , ZrB 2 , W 2 B 5 and Mo 2 B 5 , and (c) greater than 0% but less than 80% by weight of a TiC.sub.α N.sub.β powder wherein α:β ranges from 0:100 to 100:0, said powdery mixture having a mean particle size of less than 2 μm and said ceramic sintered body having substantially no pores observable by electron microscope.
Claim 5
Dependent Claim
170 words
A titanium hafnium carbide-boride metal-based ceramic sintered body for use as cutting tool and mechanical member prepared by sintering a powdery mixture consisting essentially of: (a) a titanium hafnium carbide solid solution having a ratio of atomic weight of titanium to hafnium of from 99:1 to 1:99, (b) from 5 to 95% by weight of at least one boride metal selected from the group consisting of TiB 2 , CrB 2 , TaB 2 , MnB 2 , MoB 2 , VB 2 , NbB 2 , HfB 2 , AlB 2 , ZrB 2 , W 2 B 5 and Mo 2 B 5 , and (c) greater than 0% but less than 70% by weight of at least one carbide powder selected from the group consisting of hafnium carbide, zirconium carbide, vanadium carbide, niobium carbide, tantalic carbide, molybdenum carbide and tungsten carbide, said powdery mixture having a mean particle size of less than 2 μm and said ceramic sintered body having substantially no pores observable by electron microscope.
Claim 6
Dependent Claim
170 words
A titanium hafnium carbide-boride metal-based ceramic sintered body for use as cutting tool and mechanical member prepared by sintering a powdery mixture consisting essentially of: (a) a titanium hafnium carbide solid solution having a ratio of atomic weight of titanium to hafnium of from 99:1 to 1:99, (b) from 5 to 95% by weight of at least one boride metal selected from the group consisting of TiB 2 , CrB 2 , TaB 2 , MnB 2 , MoB 2 , VB 2 , NbB 2 , HfB 2 , AlB 2 , ZrB 2 , W 2 B 5 and Mo 2 B 5 , and (c) greater than 0% but less than 70% by weight of at least one carbide powder selected from the group consisting of hafnium carbide, zirconium carbide, vanadium carbide, niobium carbide, tantalic carbide, molybdenum carbide and tungsten carbide, said powdery mixture having a mean particle size of less than 2 μm and said ceramic sintered body having substantially no pores observable by electron microscope.
Claim 7
Dependent Claim
193 words
A titanium hafnium carbide-boride metal-based ceramic sintered body for use as a cutting tool and mechanical member prepared by sintering a powdery mixture consisting essentially of: (a) a titanium hafnium carbide solid solution having a ratio of atomic weight of titanium to hafnium of from 99:1 to 1:99, (b) from 5 to 95% by weight of at least one boride metal selected from the group consisting of TiB 2 , CrB 2 , TaB 2 , MnB 2 , MoB 2 , VB 2 , NbB 2 , HfB 2 , AlB 2 , ZrB 2 , W 2 B 5 and Mo 2 B 5 , (c) greater than 0% but less than 80% by weight of a TiC.sub.α N.sub.β powder wherein α:β ranges from 0:100 to 100:0, and (d) greater than 0% but less than 70% by weight of at least one carbide powder selected from the group consisting of hafnium carbide, zirconium carbide, vanadium carbide, niobium carbide, tantalic carbide, molybdenum carbide and tungsten carbide, said powdery mixture having a mean particle size of less than 2 μm and said ceramic sintered boby having substantially no pores observable by electron microscope.
Claim 8
Dependent Claim
193 words
A titanium hafnium carbide-boride metal-based ceramic sintered body for use as a cutting tool and mechanical member prepared by sintering a powdery mixture consisting essentially of: (a) a titanium hafnium carbide solid solution having a ratio of atomic weight of titanium to hafnium of from 99:1 to 1:99, (b) from 5 to 95% by weight of at least one boride metal selected from the group consisting of TiB 2 , CrB 2 , TaB 2 , MnB 2 , MoB 2 , VB 2 , NbB 2 , HfB 2 , AlB 2 , ZrB 2 , W 2 B 5 and Mo 2 B 5 , (c) greater than 0% but less than 80% by weight of a TiC.sub.α N.sub.β powder wherein α:β ranges from 0:100 to 100:0, and (d) greater than 0% but less than 70% by weight of at least one carbide powder selected from the group consisting of hafnium carbide, zirconium carbide, vanadium carbide, niobium carbide, tantalic carbide, molybdenum carbide and tungsten carbide, said powdery mixture having a mean particle size of less than 2 μm and said ceramic sintered boby having substantially no pores observable by electron microscope.
Claim 9
Dependent Claim
26 words
A titanium hafnium carbide-boride metal-based ceramic sintered body according to claim 1, wherein said powdery mixture has a mean particle size of less than 1 μm.
Claim 10
Dependent Claim
26 words
A titanium hafnium carbide-boride metal-based ceramic sintered body according to claim 2, wherein said powdery mixture has a mean particle size of less than 1 μm.
Claim 11
Dependent Claim
26 words
A titanium hafnium carbide-boride metal-based ceramic sintered body according to claim 3, wherein said powdery mixture has a mean particle size of less than 1 μm.
Claim 12
Dependent Claim
26 words
A titanium hafnium cabide-boride metal-based ceramic sintered body according to claim 4, wherein said powdery mixture has a mean particle size of less than 1 μm.
Claim 13
Dependent Claim
28 words
A titanium hafnium carbide-boride metal-based ceramic sintered body according to claim 1, wherein said sintered body has a transverse rupture strength of 80 to 120 kg/mm 2 .
Claim 14
Dependent Claim
28 words
A titanium hafnium carbide-boride metal-based ceramic sintered body according to claim 2, wherein said sintered body has a transverse rupture strength of 80 to 120 kg/mm 2 .
Claim 15
Dependent Claim
28 words
A titanium hafnium carbide-boride metal-based ceramic sintered body according to claim 3, wherein said sintered body has a transverse rupture strength of 80 to 120 kg/mm 2 .
Claim 16
Dependent Claim
28 words
A titanium hafnium carbide-boride metal-based ceramic sintered body according to claim 4, wherein said sintered body has a transverse rupture strength of 80 to 120 kg/mm 2 .
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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) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |