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US4699800A
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Process for the production of superconducting fiber bundles
Assignee: BBC Brown Boveri AG Germany
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Filing: 1985-11-06
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Granted: 1987-10-13
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Expires: 2005-11-06
Abstract
Abstract Production of superconducting fiber bundles where in a CVD reactor niobium carbonitride of the general formula NbC x N y is deposited on support fibers by means of chemical deposition from the vapor phase by reaction of niobium chloride, carbon and nitrogen compounds, and in addition to the mentioned reaction gases at least one oxygen-containing gas is introduced into the CVD reactor in a controlled manner.
Inventors
- 👤 Cord-Henrich Dustmann
- 👤 Georg Wahl
- 👤 Franz Schmaderer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:37
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/308; H; H10; H10N; H10N60/00; H10N60/01; H10N60/0241; H10N60/80; H10N60/85
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
123 words
Process for the production of superconducting fiber bundles which comprises, depositing niobium carbonitride of the general formula NbC x N y wherein x+y≦1, on support fibers in a CVD reactor by means of chemical deoposition from the vapor phase by reaction of niobium chloride, carbon and nitrogen compounds and in addition to the mentioned reactants introducing water vapor into the CVD reactor and regulating the amount of water vapor introduced into the CVD reactor to adjust the composition of the reaction gases such that said water vapor is between 0.15% and 8% by volume of the reaction gases to effect improvement of the superconduction properties of current carrying capacity and critical magnetic field strength of the niobium carbonitride deposited on the support fibers.
Claim 2
Dependent Claim
123 words
Process for the production of superconducting fiber bundles which comprises, depositing niobium carbonitride of the general formula NbC x N y wherein x+y≦1, on support fibers in a CVD reactor by means of chemical deoposition from the vapor phase by reaction of niobium chloride, carbon and nitrogen compounds and in addition to the mentioned reactants introducing water vapor into the CVD reactor and regulating the amount of water vapor introduced into the CVD reactor to adjust the composition of the reaction gases such that said water vapor is between 0.15% and 8% by volume of the reaction gases to effect improvement of the superconduction properties of current carrying capacity and critical magnetic field strength of the niobium carbonitride deposited on the support fibers.
Claim 3
Dependent Claim
31 words
Process according to claim 1, wherein the composition of the reaction gases is adjusted such that said water vapor content is between 1.2% and 2.5% by volume of the reaction gases.
Claim 4
Dependent Claim
29 words
Process according to claim 1, wherein the composition of the reaction gases is adjusted such that said water vapor content is approximately 1.7% by volume of the reaction gases.
Claim 5
Dependent Claim
59 words
Process according to claim 1, wherein the CVD process is carried out in two stages, the niobium being deposited on the support fibers in a first process step and carbon- and nitrogen-containing compounds being added in a second process step for carbonitration of the Nb layer, and wherein the addition of the water vapor occurs in both process steps.
Claim 6
Dependent Claim
19 words
Process according to claim 4, wherein the water vapor is added in the same quantity in both process steps.
Claim 7
Dependent Claim
27 words
Process according to claim 1, wherein a gaseous silicon-containing compound is admixed to the reaction gas for the formation of niobium silicide (Nb 5 Si 3 ).
Claim 8
Dependent Claim
25 words
Process according to claim 1, wherein a gaseous boron-containing compound is admixed to the reaction gas for the formation of niobium boride (NbB 2 ).
Claim 9
Dependent Claim
22 words
Process according to claim 1, wherein a metal-containing compound is admixed to the reaction gas for the formation of an intermetallic compound.
Claim 10
Dependent Claim
24 words
Process according to claim 1, wherein an aluminum-containing compound is admixed to the reaction gas for the formation of niobium aluminide (Nb 3 Al).
Claim 11
Dependent Claim
33 words
Process according to claim 6, wherein the composition of the reaction gas is adjusted such that the content of the silicon-containing compound is between 0.2% and 1% by volume of the reaction gas.
Claim 12
Dependent Claim
15 words
Process according to claim 10, wherein the content is between 0.45% and 0.65% by volume.
Claim 13
Dependent Claim
13 words
Process according to claim 10, wherein the content is approximately 0.55% by volume.
Claim 14
Dependent Claim
33 words
Process according to claim 7, wherein the composition of the reaction gas is adjusted such that the content of the boron-containing compound is between 0.2% and 1% by volume of the reaction gas.
Claim 15
Dependent Claim
15 words
Process according to claim 13, wherein the content is between 0.45% and 0.65% by volume.
Claim 16
Dependent Claim
13 words
Process according to claim 13, wherein the content is approximately 0.55% by volume.
Claim 17
Dependent Claim
33 words
Process according to claim 8, wherein the composition of the reaction gas is adjusted such that the content of the intermetallic compound is between 0.2% and 1% by volume of the reaction gas.
Claim 18
Dependent Claim
15 words
Process according to claim 16, wherein the content is between 0.45% and 0.65% by volume.
Claim 19
Dependent Claim
13 words
Process according to claim 16, wherein the content is approximately 0.55% by volume.
Claim 20
Dependent Claim
33 words
Process according to claim 9, wherein the composition of the reaction gas is adjusted such that the content of the aluminum-containing compound is between 0.2% and 1% by volume of the reaction gas.
Claim 21
Dependent Claim
15 words
Process according to claim 19, wherein the content is between 0.45% and 0.65% by volume.
Claim 22
Dependent Claim
13 words
Process according to claim 19, wherein the content is approximately 0.55% by volume.
Claim 23
Dependent Claim
47 words
Process according to claim 1, wherein an additive selected from the group consisting of a gaseous silicon-containing compound, a gaseous boron-containing compound and a metal-containing compound are flushed into the CVD reactor by a carrier gas selected from the group consisting of hydrogen gas and nitrogen gas.
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) | 1990-10-12 | 1991-04-13 | 1991-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-12 | 1995-04-13 | 1995-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-12 | 1999-04-13 | 1999-10-13 | $7700.00 | Window Closed / Lapsed |