US4624705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanical alloying
Assignee: Huntington Alloys Corp
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Filing: 1986-04-04
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Granted: 1986-11-25
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Expires: 2006-04-04
Abstract
Abstract Aluminum-base alloys and a method of preparing aluminum-base alloys by mechanical alloying in the presence of a carbidiferous processing aid wherein a strong carbide former such as titanium is included so as to produce carbides in the final alloy more thermally stable at temperatures in excess of 100° C. than Al 4 C 3 .
Inventors
- 👤 Arun D. Jatkar
- 👤 Paul S. Gilman
- 👤 Raymond C. Benn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:06
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0047; C22C32/0052; C22C1/00; C22C1/10; C22C1/1084
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A sintered and worked aluminum-base alloy adapted to be used at temperatures in excess of about 100° C., the powder precursor of said alloy having been subjected to mechanical alloying in the presence of a carbon-containing processing aid and said alloy being characterized by containing a dispersion formed in situ of particles less than about 500 A in major dimension of a carbidiferous material more stable than Al 4 C 3 at temperatures above 100° C. in an aluminum matrix and said carbidiferous material containing a metal from the group of titanium, niobium, vanadium and zirconium.
Claim 2
Dependent Claim
96 words
A sintered and worked aluminum-base alloy adapted to be used at temperatures in excess of about 100° C., the powder precursor of said alloy having been subjected to mechanical alloying in the presence of a carbon-containing processing aid and said alloy being characterized by containing a dispersion formed in situ of particles less than about 500 A in major dimension of a carbidiferous material more stable than Al 4 C 3 at temperatures above 100° C. in an aluminum matrix and said carbidiferous material containing a metal from the group of titanium, niobium, vanadium and zirconium.
Claim 3
Dependent Claim
13 words
An aluminum-base alloy as in claim 1 wherein said carbidiferous material contains titanium.
Claim 4
Dependent Claim
41 words
An aluminum-base alloy as in claim 1 wherein said metal from the group of titanium, niobium, vanadium and zirconium is present in an amount at least equal to the stoichiometric amount minimally necessary to combine with carbon present in said alloy.
Claim 5
Dependent Claim
28 words
An aluminum-base alloy as in claim 1 which contains at least one element having a low rate of diffusion in solid aluminum at temperatures above about 300° C.
Claim 6
Dependent Claim
17 words
An aluminum-base alloy as in claim 1 containing about 0.01% to 0.2% by weight of rare earth.
Claim 7
Dependent Claim
91 words
A process for producing sintered and worked aluminum-base alloy to be used at temperatures in excess of about 100° C. comprising including in a mechanical alloying charge for an aluminum-base alloy a material in microfine dispersion or in a form readily convertable to a microfine dispersion under mechanical alloying conditions containing a carbide-forming element from the group of titanium, vanadium, niobium and zirconium, mechanically alloying said charge in the presence of a carbon-containing processing aid and thereafter compressing and hot working the thus produced mechanically alloyed product to substantially full density.
Claim 8
Dependent Claim
91 words
A process for producing sintered and worked aluminum-base alloy to be used at temperatures in excess of about 100° C. comprising including in a mechanical alloying charge for an aluminum-base alloy a material in microfine dispersion or in a form readily convertable to a microfine dispersion under mechanical alloying conditions containing a carbide-forming element from the group of titanium, vanadium, niobium and zirconium, mechanically alloying said charge in the presence of a carbon-containing processing aid and thereafter compressing and hot working the thus produced mechanically alloyed product to substantially full density.
Claim 9
Dependent Claim
12 words
A process as in claim 6 wherein said carbide-forming element is titanium.
Claim 10
Dependent Claim
21 words
A process as in claim 6 wherein said mechanical alloying charge contains about 0.01% to about 0.20% of rare earth metal.
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) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |