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US5036028A
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High density metal boride-based ceramic sintered body
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1990-04-18
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Granted: 1991-07-30
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Expires: 2010-04-18
Abstract
Abstract A high density metal-boride based ceramic sintered body consists essentially of component (A) at least one of TiB2, ZrB2, CrB2, HfB2, VB2, TaB2, NbB2, MnB2, MoB2, YB2, AlB2, MgB2, CrB, VB, TaB, NbB, MoB, HfB, YB, ZrB, HfB, TiB, MnB, W2B5 and Mo2B5, componet (B) 0.1 wt. %-10 wt. % based on the total amount of a metal binder comprising at least one of cobalt boride, nickel boride and iron boride, and component (C) 0.1 wt. %-10 wt. % based on the total amount of at least one of a double carbide comprising Ti, Zr, W and C, ZrCN, HfCN, or a double carbo-nitride comprising Ti, Zr, Hf and C, N. The sintered body is not easily oxidized and has extremely few pores and high shock resistance even using a fine grain raw material powder because component (C) has an oxygen removing effect during sintering.
Inventors
- 👤 Tadahiko Watanabe
- 👤 Tsuyoshi Doutsu
- 👤 Kazuhisa Shobu
- 👤 Yukio Kai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:55
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58071; C04B35/58078; C04B35/622; C04B35/64; C04B35/645
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
173 words
A high density metal boride-based ceramic sintered body consisting essentially of 0.1 to 10 wt. % of a first component as a metal binder selected from the group consisting of cobalt boride, nickel boride, iron boride and mixtures thereof; 0.1 to 10 wt. % of at least one second component selected from the group consisting of a double carbide of Ti, Zr, Hf or W having an atomic ratio of metals of 1:9 to 9:1 and a double carbo-nitride of Ti, Zr, or Hf having an atomic ratio of metals of 1:19 to 9:1 and an atomic ratio of carbon to nitrogen of 1:9 to 9:1; and a remainder of at least one third component metal boride selected from the group consisting of TiB 2 , ZrB 2 , CrB 2 , HfB 2 , VB 2 , TaB 2 , NbB 2 , MnB 2 , MoB 2 , YB 2 , CrB, VB, TaB, NbB, MoB, HfB, YB, ZrB, TiB, MnB, W 2 B 5 and MO 2 B 5 .
Claim 2
Dependent Claim
173 words
A high density metal boride-based ceramic sintered body consisting essentially of 0.1 to 10 wt. % of a first component as a metal binder selected from the group consisting of cobalt boride, nickel boride, iron boride and mixtures thereof; 0.1 to 10 wt. % of at least one second component selected from the group consisting of a double carbide of Ti, Zr, Hf or W having an atomic ratio of metals of 1:9 to 9:1 and a double carbo-nitride of Ti, Zr, or Hf having an atomic ratio of metals of 1:19 to 9:1 and an atomic ratio of carbon to nitrogen of 1:9 to 9:1; and a remainder of at least one third component metal boride selected from the group consisting of TiB 2 , ZrB 2 , CrB 2 , HfB 2 , VB 2 , TaB 2 , NbB 2 , MnB 2 , MoB 2 , YB 2 , CrB, VB, TaB, NbB, MoB, HfB, YB, ZrB, TiB, MnB, W 2 B 5 and MO 2 B 5 .
Claim 3
Dependent Claim
30 words
A high density metal boride-based ceramic sintered body according to claim 1, wherein said first, second and third components each have a mean grain size of 4 μm or less.
Claim 4
Dependent Claim
30 words
A high density metal boride-based ceramic sintered body according to claim 2, wherein said first, second and third components each have a mean grain size of 2 μm or less.
Claim 5
Dependent Claim
29 words
A high density metal boride-based ceramic sintered body according to claim 1, wherein said metal binder is CoB and said metal boride is TaB 2 and TiB 2 .
Claim 6
Dependent Claim
148 words
A high density metal boride-based ceramic sintered body consisting essentially of 0.1 to 10 wt. % of a first component as a metal binder selected from the group consisting of cobalt boride, nickel boride, iron boride and mixtures thereof; 0.1 to 10 wt. % of at least one second component selected from the group consisting of a double carbide of Ti, Zr, Hf or W having an atomic ratio of metals of 1:9 to 9:1; and a remainder of at least one third component metal boride selected from the group consisting of TiB 2 , ZrB 2 , CrB 2 , HfB 2 , VB 2 , TaB 2 , NbB 2 , MnB 2 , MoB 2 , YB 2 , AlB 2 , MgB 2 , CrB, VB, TaB, NbB, MoB, HfB, YB, ZrB, TiB, MnB, W 2 B 5 and Mo 2 B 5 .
Claim 7
Dependent Claim
148 words
A high density metal boride-based ceramic sintered body consisting essentially of 0.1 to 10 wt. % of a first component as a metal binder selected from the group consisting of cobalt boride, nickel boride, iron boride and mixtures thereof; 0.1 to 10 wt. % of at least one second component selected from the group consisting of a double carbide of Ti, Zr, Hf or W having an atomic ratio of metals of 1:9 to 9:1; and a remainder of at least one third component metal boride selected from the group consisting of TiB 2 , ZrB 2 , CrB 2 , HfB 2 , VB 2 , TaB 2 , NbB 2 , MnB 2 , MoB 2 , YB 2 , AlB 2 , MgB 2 , CrB, VB, TaB, NbB, MoB, HfB, YB, ZrB, TiB, MnB, W 2 B 5 and Mo 2 B 5 .
Claim 8
Dependent Claim
30 words
A high density metal boride-based ceramic sintered body according to claim 5, wherein said first, second and third components each have a mean grain size of 4 μm or less.
Claim 9
Dependent Claim
30 words
A high density metal boride-based ceramic sintered body according to claim 6, wherein said first, second and third components each have a mean grain size of 2 μm or less.
Claim 10
Dependent Claim
29 words
A high density metal boride-based ceramic sintered body according to claim 5, wherein said metal binder is CoB and said metal boride is TaB 2 and TiB 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) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |