US3852078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass of polycrystalline cubic system boron nitride and composites of polycrystalline cubic system boron nitride and other hard materials, and processes for manufacturing the same
Assignee: Individual
•
Filing: 1971-12-23
•
Granted: 1974-12-03
•
Expires: 1991-12-23
Abstract
Abstract This invention gives bonded or compact bodies of polycrystalline cubic system boron nitride and substantially uniform composites of polycrystalline cubic system boron nitride and other hard materials, for example, metal borides, such as titanium boride and zirconium boride, covalent or metallic cabides, such as boron carbide, silicon carbide, titanium, carbide, tungsten carbide and chromium carbide, metal nitrides, such as titanium nitride, tantalum nitride, silicon nitride and aluminum nitride, metal oxides, such as alumina and silica, complex oxide such as garnet and agate, and diamond. Further, this invention provides a process of obtaining the bonded body of these materials which comprises subjecting hexagonal system boron nitride powder, or a mixture of hexagonal system boron nitride powder and cubic system boron nitride crystal powder or powders of the above-mentioned hard materials to high temperatures and high pressures.
Inventors
- 👤 K Ichinose
- 👤 R Mori
- 👤 T Aoki
- 👤 M Wakatsuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:18
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/583; C04B35/5831; B; B01; B01J; B01J3/00; B01J3/06; B01J3/062; B01J2203/00; B01J2203/06; B01J2203/0605; B01J2203/062; B01J2203/0645; B01J2203/065; B01J2203/0655; B01J2203/066; B01J2203/067; B01J2203/0675; B01J2203/0685
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
43 words
A HARD MASS COMPRISING A MATRIX AND A DISPERSED PHASE SUBSTANTIALLY COMPRISING MORE THAN TEN PERCENT BY WEIGHT OF POLYCRYSTALLINE CUBIC SYSTEM BORON NITRIDE AS THE MATRIX AND GRANULAR DIAMOND HOMOGENEOUSLY DISPERED WITHIN AND BONDED BY THE POLYCRYSTALLINE CUBIC SYSTEM BORON NITRIDE MATRIX.
Claim 2
Dependent Claim
43 words
A HARD MASS COMPRISING A MATRIX AND A DISPERSED PHASE SUBSTANTIALLY COMPRISING MORE THAN TEN PERCENT BY WEIGHT OF POLYCRYSTALLINE CUBIC SYSTEM BORON NITRIDE AS THE MATRIX AND GRANULAR DIAMOND HOMOGENEOUSLY DISPERED WITHIN AND BONDED BY THE POLYCRYSTALLINE CUBIC SYSTEM BORON NITRIDE MATRIX.
Claim 3
Dependent Claim
69 words
The hard mass according to claim 1, containing at least one granular hard material selected from the group consisting of borides of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten, carbides of these metals, nitrides of these metals, boron carbide, silicon carbide, aluminum nitride, silicon nitride, alumina, silica, iron oxide, nickel oxide, chromic oxide, garnet and agate dispersed in said matrix in addition to said dispersed diamond.
Claim 4
Dependent Claim
35 words
The hard mass according to claim 1, wherein the mass further contains at least one metal selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe and Si.
Claim 5
Dependent Claim
24 words
The hard mass according to claim 1 wherein the amount of said polycrystalline cubic system boron nitride is more than 20 percent by weight.
Claim 6
Dependent Claim
35 words
The hard mass according to claim 1, wherein the mass further contains at least one metal selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe and Si.
Claim 7
Dependent Claim
107 words
A process for manufacturing hard masses which comprises maintaining a mixture of hexagonal system boron nitride powder the main part of which is less than 3 microns in diameter in terms of the primary particles and the powder of a hard material at a temperature of at least 1,100*C and under a pressure ranging from 60 K bar to 100 K bar, the combination of said temperature and pressure being within the thermodynamically stable area of cubic system boron nitride, thereby converting the said hexagonal system boron nitride into a polycrystalline cubic system boron nitRide matrix with the said powder hard material dispersed uniformly in said matrix.
Claim 8
Dependent Claim
107 words
A process for manufacturing hard masses which comprises maintaining a mixture of hexagonal system boron nitride powder the main part of which is less than 3 microns in diameter in terms of the primary particles and the powder of a hard material at a temperature of at least 1,100*C and under a pressure ranging from 60 K bar to 100 K bar, the combination of said temperature and pressure being within the thermodynamically stable area of cubic system boron nitride, thereby converting the said hexagonal system boron nitride into a polycrystalline cubic system boron nitRide matrix with the said powder hard material dispersed uniformly in said matrix.
Claim 9
Dependent Claim
61 words
The process according to claim 6, wherein said powder hard material is selected from the group consisting of borides of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum and tungsten, carbides of these metals, nitrides of these metals, boron carbide, silicon carbide, aluminum nitride, silicon nitride, alumina, silica, iron oxide, nickel oxide, chromic oxide, cubic system boron nitride, garnet and agate.
Claim 10
Dependent Claim
34 words
The process according to claim 7, wherein said mixture further contains at least one metal selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe and Si.
Claim 11
Dependent Claim
13 words
The process according to claim 6, wherein said powder hard material is diamond.
Claim 12
Dependent Claim
34 words
The process according to claim 9 wherein said mixture further contains at least one metal selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe and Si.
Claim 13
Dependent Claim
20 words
The process according to claim 6 wherein said hexagonal system boron nitride powder is less than 3 microns in diameter.
Claim 14
Dependent Claim
20 words
The proces according to claim 9 wherein said hexagonal system boron nitride powder is less than 3 microns in diameter.
References Cited (Backward Citations)
US2872327A
Cited
US2888355A
Cited
US2887393A
Cited
US3256103A
Cited
US3233988A
Cited
US3291622A
Cited
US3544486A
Cited
US3514271A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |