US4917739A
Expired / Lapsed
US
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Rapidly solidified aluminum-transition metal-silicon alloys
Assignee: Honeywell International Inc
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Filing: 1988-04-29
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Granted: 1990-04-17
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Expires: 2008-04-29
Abstract
Abstract The present invention provides a method for producing an aluminum alloy which includes the step of carbo-thermically reducing an aluminous material to provide an alloy consisting essentially of the formula Al bal TM d Si e , wherein TM is at least one element selected from the group consisting of Fe, Ni, Co, Ti, V, Zr, Cu and Mn, "d" ranges from about 2-20 wt %, "e" ranges from about 2.1-20 wt %, and the balance is aluminum and incidental impurities. The alloy is placed in the molten state and rapidly solidified at a quench rate of at least about 10 6 K/sec to produce a rapidly solidified alloy composed of a predominately microeutectic and/or microcellular structure.
Inventors
- 👤 Colin M. Adam
- 👤 Kenji Okazaki
- 👤 David J. Skinner
- 👤 Robert G. Corey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:18
CPC Classifications
C; C22; C22C; C22C45/00; C22C45/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
107 words
An aluminum alloy consisting essentially of the formula Al bal TM d Si e wherein "TM" is at least one element selected from the group consisting of Fe, Co, Ti, V, Ni, Zr, Cu, Mg, and Mn, "d" ranges from about 2-20 wt %, "e" ranges from about 2.1-20 wt %, and the balance is aluminum plus incidental impurities, said alloy having been rapidly solidified at a quench rate of at least about 10 6 K./sec from a carbothermically reduced aluminous material containing oxides of Al, Si and transition metals, and having a microstructure which is at least about 50% composed of a microeutectic and/or microcellular structure.
Claim 2
Dependent Claim
107 words
An aluminum alloy consisting essentially of the formula Al bal TM d Si e wherein "TM" is at least one element selected from the group consisting of Fe, Co, Ti, V, Ni, Zr, Cu, Mg, and Mn, "d" ranges from about 2-20 wt %, "e" ranges from about 2.1-20 wt %, and the balance is aluminum plus incidental impurities, said alloy having been rapidly solidified at a quench rate of at least about 10 6 K./sec from a carbothermically reduced aluminous material containing oxides of Al, Si and transition metals, and having a microstructure which is at least about 50% composed of a microeutectic and/or microcellular structure.
Claim 3
Dependent Claim
73 words
An alloy as recited in claim 1, said alloy consisting essentially of the formula Al bal Fe a Si b T c , wherein "T" is one or more elements selected from the group consisting of Ni, Co, Ti, V, Zr, Cu and Mn, "a" ranges from about 2-20 wt %, "b" ranges from about 2.1-20 wt %, "c" ranges from about 0.2-10 wt %, and the balance is aluminum and incidental impurities.
Claim 4
Dependent Claim
48 words
An alloy as recited in claim 2, wherein said alloy is capable of providing a ductility of at least about 5% elongation to fracture and a tensile strength of at least about 350 MPa when particles of said alloy are consolidated together to form an article of manufacture.
Claim 5
Dependent Claim
75 words
A method as recited in claim 3, in which said alloy consists essentially of the formula Al bal Fe a Si b T c , wherein "T" is one or more elements selected from the group consisting of Ni, Co, Ti, V, Zr, Cu and Mn, "a" ranges from about 2-20 wt %, "b" ranges from about 2.1-20 wt %, "c" ranges from about 0.2-10 wt %, and the balance is aluminum and incidental impurities.
Claim 6
Dependent Claim
29 words
A method as recited in claim 4, wherein said alloy is produced by adding selected amounts of Al, Fe, Si and T group elements to said carbothermically reduced material.
Claim 7
Dependent Claim
25 words
An alloy as recited in claim 1, wherein said alloy has a microstructure which is at about 90% composed of a microeutectic and/or microcellular structure.
Claim 8
Dependent Claim
19 words
An alloy as recited in claim 1, wherein the microstructure is approximately 100% composed of a microeutectic and/or microcellular.
Claim 9
Dependent Claim
22 words
An alloy as recited in claim 2, wherein the microstructure is at least about 90% composed of a microeutectic and/or microcellular structure.
Claim 10
Dependent Claim
20 words
An alloy as recited in claim 2, wherein the microstructure is approximately 100% composed of a microeutectic and/or microcellular structure.
Claim 11
Dependent Claim
53 words
An alloy as recited in claim 1, said alloy having been rapidly solidified on a quench surface moving at a speed of at least about 1200 to 2750 meters per minute to produce a rapidly solidified alloy in which the microstructure is at least about 90% composed of a microeutectic and/or microcellular structure.
Claim 12
Dependent Claim
82 words
An alloy as recited in claim 1, said alloy having been rapidly solidified on a quench surface in the presence of a protective gas selected from the group consisting of carbon monoxide, helium, nitrogen, and argon, said gas having a lower density than air and said quench surface moving at a speed of at least about 1200 to 2750 meters per minute to produce a rapidly solidified alloy in which the microstructure is approximately 100% composed of a microeutectic and/or microcellular structure.
References Cited (Backward Citations)
US4734130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |