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US5217747A
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Reactive spray forming process
Assignee: Pyrogenesis Inc
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Filing: 1991-02-25
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Granted: 1993-06-08
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Expires: 2011-02-25
Abstract
Abstract A reactive spray forming process comprises generating a molten spray of metal, and reacting such molten spray of metal in flight with a surrounding hot metal halide gas to form a desirable alloy, intermetallic or composite product. The molten spray of metal may be directed towards a cooled substrate and the alloy, intermetallic or composite product collected and solidified on the substrate.
Inventors
- 👤 Peter G. Tsantrizos
- 👤 Lakis T. Mavropoulos
- 👤 Boulos Maher
- 👤 Jerzy Jurewicz
- 👤 Bruce Henshaw
- 👤 Raynald Lachance
- 👤 Kaiyi Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:06
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/16; B22F9/18; B22F9/28; C; C23; C23C; C23C4/00; C23C4/12; C23C4/123; C23C4/134
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
A reactive plasma spray forming process comprising: generating a hot metal halide plasma; and introducing a molten spray of a reducing metal into the halide plasma for reacting the said molten spray and the metal halide plasma to form a mixture of the molten metal and the metal of the halide molecule, where the mixture is an alloy, an intermetallic or a composite of a metal and an intermetallic.
Claim 2
Dependent Claim
69 words
A reactive plasma spray forming process comprising: generating a hot metal halide plasma; and introducing a molten spray of a reducing metal into the halide plasma for reacting the said molten spray and the metal halide plasma to form a mixture of the molten metal and the metal of the halide molecule, where the mixture is an alloy, an intermetallic or a composite of a metal and an intermetallic.
Claim 3
Dependent Claim
32 words
A process as defined in claim 1, wherein the molten spray of metal is directed towards a cooled substrate and the alloy, intermetallic or composite product collected and solidified on the substrate.
Claim 4
Dependent Claim
21 words
A process as defined in claim 1, wherein the reacted molten product freezes in flight, and is collected as a powder.
Claim 5
Dependent Claim
40 words
A process as defined in 1, wherein a plasma torch fed with a plasmagas is used to generate the metal halide plasma and to produce the molten metal spray from either a molten metal stream or from a metal powder.
Claim 6
Dependent Claim
40 words
A process as defined in 1, wherein a plasma torch fed with a plasmagas is used to generate the metal halide plasma and to produce the molten metal spray from either a molten metal stream or from a metal powder.
Claim 7
Dependent Claim
27 words
A process as defined in claim 4, wherein the plasma torch is an induction plasma torch and wherein a metal halide gas is injected in the plasmagas.
Claim 8
Dependent Claim
36 words
A process as defined in claim 4, wherein the plasma torch is a d.c. plasma torch and wherein a metal halide gas is introduced either in the plasmagas, or in the tailframe of the plasma torch.
Claim 9
Dependent Claim
20 words
A process as defined in claim 4, wherein a consumable electrode is used to generate the molten spray of metal.
Claim 10
Dependent Claim
37 words
A process as defined in claim 1, wherein a plasma torch is used to generate the metal halide plasma and wherein a two-fluid atomizing nozzle is used to introduce a molten metal into the metal halide plasma.
Claim 11
Dependent Claim
24 words
A process as defined in claim 8, wherein the molten metal and metal halide plasma are fed as the two fluids into the atomizer.
Claim 12
Dependent Claim
50 words
A process as defined in claim 9, wherein the atomizing nozzle is a two-fluid atomizing nozzle and wherein the heated metal halide gas is introduced into the two-fluid atomizing nozzle as one of the fluids and the molten metal is introduced into the two-fluid atomizing nozzle as the other fluid.
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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) | 1996-06-07 | 1996-12-07 | 1997-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-07 | 2000-12-07 | 2001-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-07 | 2004-12-07 | 2005-06-08 | $7700.00 | Window Closed / Lapsed |