US4225355A
Expired / Lapsed
US
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Amorphous boron-carbon alloy in bulk form and methods of making the same
Assignee: RTX Corp
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Filing: 1979-02-16
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Granted: 1980-09-30
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Expires: 1999-02-16
Abstract
Abstract Processes of forming amorphous boron-carbon alloy in bulk form without crystallization are disclosed. Such products can be produced in thicknesses well in excess of ten mils by employing Reynolds number gas reactant flow conditions of 40 to 120. The resultant products of such processes having grain sizes preferably less than 30 A are also disclosed.
Inventors
- 👤 Francis S. Galasso
- 👤 Roy Fanti
- 👤 Richard D. Veltri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:22
CPC Classifications
C; C22; C22C; C22C29/00; C22C29/14; B; B82; B82Y; B82Y30/00; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/64; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2958
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
79 words
A process of forming amorphous boron-carbon alloy in bulk form comprising: subjecting a releasable mold reaction surface to a gaseous mixture of at least one boron-containing gas, at least one carbon-containing gas, and a reducing gas, at temperatures of 950° C. to 1300° C., and Reynolds Number flow condition of 40-120, until an amorphous boron-carbon alloy structure at least 40 mils thick is deposited on the mold reaction surface, and removing the formed structure from the mold reaction surface.
Claim 2
Dependent Claim
79 words
A process of forming amorphous boron-carbon alloy in bulk form comprising: subjecting a releasable mold reaction surface to a gaseous mixture of at least one boron-containing gas, at least one carbon-containing gas, and a reducing gas, at temperatures of 950° C. to 1300° C., and Reynolds Number flow condition of 40-120, until an amorphous boron-carbon alloy structure at least 40 mils thick is deposited on the mold reaction surface, and removing the formed structure from the mold reaction surface.
Claim 3
Dependent Claim
99 words
A process of forming amorphous boron-carbon alloy in bulk form comprising: subjecting a releasable mold reaction surface to a gaseous mixture comprising CH a X b wherein a+b=4 and X is selected from the group consisting of F, Cl, Br or I or combinations thereof, BX 3 where X is defined as above, and a reducing gas, at temperatures of 950° C. to 1300° C., and Reynolds number flow condition of 40 to 120, until a structure at least 40 mils thick is deposited on the mold reaction surface, and removing the formed structure from the mold reaction surface.
Claim 4
Dependent Claim
99 words
A process of forming amorphous boron-carbon alloy in bulk form comprising: subjecting a releasable mold reaction surface to a gaseous mixture comprising CH a X b wherein a+b=4 and X is selected from the group consisting of F, Cl, Br or I or combinations thereof, BX 3 where X is defined as above, and a reducing gas, at temperatures of 950° C. to 1300° C., and Reynolds number flow condition of 40 to 120, until a structure at least 40 mils thick is deposited on the mold reaction surface, and removing the formed structure from the mold reaction surface.
Claim 5
Dependent Claim
111 words
A process of forming amorphous boron-carbon alloy in bulk form comprising: subjecting a releasable glass mold reaction surface to a gaseous mixture of CH 4 , BCl 3 and H 2 with a CH 4 /BCl 3 ratio of 0.5/1 to 6.0/1, a CH 4 /(CH 4 +BCl 3 ) ratio of 0.3/1 to 0.9/1, a CH 4 /(CH 4 +BCl 3 +H 2 ) ratio of 0.15/1 to 0.5/1, at temperatures of 1120°-1170° C. and a Reynolds number flow condition of 60 to 100, producing a structure at least 40 mils thick and having a grain size less than 3 A, and removing the formed structure from the mold surface.
Claim 6
Dependent Claim
111 words
A process of forming amorphous boron-carbon alloy in bulk form comprising: subjecting a releasable glass mold reaction surface to a gaseous mixture of CH 4 , BCl 3 and H 2 with a CH 4 /BCl 3 ratio of 0.5/1 to 6.0/1, a CH 4 /(CH 4 +BCl 3 ) ratio of 0.3/1 to 0.9/1, a CH 4 /(CH 4 +BCl 3 +H 2 ) ratio of 0.15/1 to 0.5/1, at temperatures of 1120°-1170° C. and a Reynolds number flow condition of 60 to 100, producing a structure at least 40 mils thick and having a grain size less than 3 A, and removing the formed structure from the mold surface.
Claim 7
Dependent Claim
16 words
The process of claims 1 or 2 wherein the releasable surface is a glass molding surface.
Claim 8
Dependent Claim
18 words
The process of claims 1, 2 or 3 wherein the releasable surface is a flat plate or tube.
Claim 9
Dependent Claim
24 words
The process of claim 1 wherein the carbon containing gas is a C 1 to C 5 containing hydrocarbon or halogen containing derivative thereof.
Claim 10
Dependent Claim
17 words
The process of claim 1 wherein the boron containing gas is a halogenated boron compound or diborane.
Claim 11
Dependent Claim
22 words
The process of claim 7 wherein the halogenated boron compound is BX 3 where X=F, Cl, Br, I or a combination thereof.
Claim 12
Dependent Claim
11 words
The process of claim 1 wherein the reducing gas is hydrogen.
Claim 13
Dependent Claim
22 words
The process of claims 1 or 2 wherein the carbon source is CH 4 and the boron source is BCl 3 .
Claim 14
Dependent Claim
15 words
The process of claims 1 or 2 wherein the Reynolds number is 60 to 100.
Claim 15
Dependent Claim
16 words
The process of claims 1 or 2 wherein the temperature is 1120° C. to 1170° C.
Claim 16
Dependent Claim
13 words
The process of claims 1 or 2 wherein the temperature is 1182° C.
Claim 17
Dependent Claim
18 words
The process of claims 1 or 2 wherein the process is carried out for 1 to 2 hours.
Claim 18
Dependent Claim
19 words
The process of claims 1 or 2 wherein the boron-carbon alloy has a grain size less than 30 A.
Claim 19
Dependent Claim
14 words
The process of claim 19 wherein the grain size is less than 15 A.
Claim 20
Dependent Claim
53 words
The process of claims 1 or 2 wherein the ratio of carbon to boron containing gas is 0.5/1 to 6.0/1, the ratio of carbon containing gas to carbon and boron containing gas is 0.3/1 to 0.9/1, and the ratio of carbon containing gas to carbon, boron and reducing gases is 0.15/1 to 0.5/1.
Claim 21
Dependent Claim
41 words
An amorphous, free-standing, hard, thick boron-carbon alloy structure at least 40 mils thick having a high modulus of elasticity, a grain size less than 30 A, no sharp discernible X-ray diffraction pattern, a smooth surface, isotropic expansion and no grain boundaries.
Claim 22
Dependent Claim
41 words
An amorphous, free-standing, hard, thick boron-carbon alloy structure at least 40 mils thick having a high modulus of elasticity, a grain size less than 30 A, no sharp discernible X-ray diffraction pattern, a smooth surface, isotropic expansion and no grain boundaries.
Claim 23
Dependent Claim
14 words
The article of claim 18 in the shape of a flat plate or tube.
Claim 24
Dependent Claim
13 words
The article of claim 18 having a grain size less than 15 A.
Claim 25
Dependent Claim
13 words
The article of claim 18 having from 30 to 70% by weight carbon.
Claim 26
Dependent Claim
18 words
The process of claims 1, 2 or 3 wherein the structure contains 30 to 70% by weight carbon.
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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) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |