US4990181A
Expired / Lapsed
US
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Aluminide structures and method
Assignee: Corning Inc
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Filing: 1989-03-14
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Granted: 1991-02-05
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Expires: 2009-03-14
Abstract
Abstract The present invention is directed to porous sintered aluminide structures of aluminum, nickel, titanium, and/or rare earth metal. A process is disclosed for forming and sintering aluminides. Other components are optionally added to the aluminide compositions to vary the physical properties of the resultant structure.
Inventors
- 👤 Kim D. Pierotti
- 👤 Srinivas H. Swaroop
- 👤 Raja R. Wusirika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:18
CPC Classifications
B; B01; B01D; B01D39/00; B01D39/14; B01D39/20; B01D39/2027; B01D39/2031; B01D39/2034; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F2998/00
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
50 words
A porous sintered structure, with total porosity between about 25% and about 75% by volume, comprised of aluminide compositions of metal selected from the group consisting of titanium, nickel, rare earth metals, the alloys thereof, combinations of said aluminide compositions, combinations of said aluminide compositions and said metal and/or aluminum.
Claim 2
Dependent Claim
50 words
A porous sintered structure, with total porosity between about 25% and about 75% by volume, comprised of aluminide compositions of metal selected from the group consisting of titanium, nickel, rare earth metals, the alloys thereof, combinations of said aluminide compositions, combinations of said aluminide compositions and said metal and/or aluminum.
Claim 3
Dependent Claim
30 words
The structure of claim 1 wherein said aluminide compositions consist essentially of aluminum up to 70% by weight and up to 85% by weight titanium, their alloys and combinations thereof.
Claim 4
Dependent Claim
28 words
The structure of claim 1 wherein said aluminide compositions consist essentially of aluminum up to 70% and up to 85% by weight nickel, their alloys and combinations thereof.
Claim 5
Dependent Claim
30 words
The structure of claim I wherein said aluminide compositions consist essentially of aluminum up to 70% and up to 85% by weight rare earth metals, their alloys and combinations thereof.
Claim 6
Dependent Claim
30 words
The structure of claim 1 wherein said structure comprises up to 10% by weight sintering aids selected from the group consisting of alkaline earth metals, transition metals, and combinations thereof.
Claim 7
Dependent Claim
31 words
The structure of claim 5 wherein said structure comprises metal sintering aids up to 10 weight % selected from the group consisting of manganese, copper, cobalt, tin, chromium and combinations thereof.
Claim 8
Dependent Claim
27 words
The structure of claim 1 wherein said structure comprises strength and/or ductility aids selected from the group consisting of tungsten, boron, molybdenum, silicon, and a combination thereof.
Claim 9
Dependent Claim
19 words
The structure of claim 5 wherein said sintering aids are selected from the group consisting of magnesium and calcium.
Claim 10
Dependent Claim
14 words
The structure of claim 1 wherein said aluminide composition comprises NiAl and/or its alloys.
Claim 11
Dependent Claim
16 words
The structure of claim 1 wherein said aluminide composition comprises Ni 3 Al and/or its alloys.
Claim 12
Dependent Claim
14 words
The structure of claim 1 wherein said aluminide composition comprises TiAl and/or its alloys.
Claim 13
Dependent Claim
16 words
The structure of claim 1 wherein said aluminide composition comprises Ti 3 Al and/or its alloys.
Claim 14
Dependent Claim
15 words
The structure of claim 1 wherein said aluminide composition comprises TiA 13 and/or its alloys.
Claim 15
Dependent Claim
14 words
The structure of claim 1 wherein said aluminide composition comprises ErA12 and/or its alloys.
Claim 16
Independent Claim
67 words
A method for sintering porous aluminide structure comprising the steps of; admixing either aluminide powders and/or metal powders forming aluminide during sintering or aluminide powder and metal powder, with a solvent, a binder, a lubricant, a wetting agent to form a batch and firing said batch in an inert, reducing, or some combination thereof, atmosphere whereby said organic binder oxidizes and said aluminide and/or metal powders sinter.
Claim 17
Independent Claim
67 words
A method for sintering porous aluminide structure comprising the steps of; admixing either aluminide powders and/or metal powders forming aluminide during sintering or aluminide powder and metal powder, with a solvent, a binder, a lubricant, a wetting agent to form a batch and firing said batch in an inert, reducing, or some combination thereof, atmosphere whereby said organic binder oxidizes and said aluminide and/or metal powders sinter.
Claim 18
Dependent Claim
53 words
The method of claim 15 wherein the batch of said admixing step comprises nickel or aluminum and nickel aluminides, and the firing step includes the steps of: oxidation of said organic binder and of part of said nickel to metal oxide, reduction of said nickel oxide, and sintering said aluminide, said aluminum powder.
Claim 19
Dependent Claim
12 words
The method of claim 15 wherein said reducing atomsphere is hydrogen gas.
Claim 20
Dependent Claim
24 words
The method of claim 15 wherein said admixing includes an alkaline earth metal sintering aid selected from the group consisting of magnesium and calcium.
Claim 21
Dependent Claim
47 words
A porous sintered structure comprised of aluminide compositions of aluminum and metal selected from the group consisting of titantium, nickel, rare earth metals, the alloys thereof, combinations of said aluminide compositions, and combinations of said aluminide compositions and said metal, and wherein said structure is a honeycomb.
Claim 22
Dependent Claim
47 words
A porous sintered structure comprised of aluminide compositions of aluminum and metal selected from the group consisting of titantium, nickel, rare earth metals, the alloys thereof, combinations of said aluminide compositions, and combinations of said aluminide compositions and said metal, and wherein said structure is a honeycomb.
Claim 23
Dependent Claim
22 words
The structure of claim 19 in combination with a catalyst and placed in the exhaust pathway of an organically fueled power plant.
Claim 24
Dependent Claim
21 words
The structure of claim 19 in combination with a catalyst and placed in the exhaust pathway of an internal combustion engine.
Claim 25
Dependent Claim
15 words
The structure of claim 19 in combination with the exhaust pathway of a diesel engine.
Claim 26
Dependent Claim
18 words
The structure of claim 19 wherein said structure is a substructure to which other structural materials are added.
Claim 27
Dependent Claim
14 words
The structure of claim 1 with pore sizes substantially between 1 and 100 μm.
Claim 28
Dependent Claim
14 words
The structure of claim 1 with pore sizes substantially between 10 and 50 μm.
Claim 29
Dependent Claim
23 words
The structure of claim 1, 2, 3, 4 or 5 wherein the total porosity is between about 40% and about 60% by volume.
References Cited (Backward Citations)
US4762558A
Cited
US4758272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |