US4713111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aluminum-SiC composite using sodium tetrasborate as an addition agent
Assignee: Alumax Inc
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Filing: 1986-08-08
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Granted: 1987-12-15
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Expires: 2006-08-08
Abstract
Abstract Reinforced composite aluminum-matrix articles containing silicon carbide fibers or particles, are produced by a casting process wherein the silicon carbide fibers or particles are mixed with dehydrated sodium tetraborate and mixed with molten aluminum or aluminum alloy whereby wetting of the reinforcing material and ready dispersal thereof in the aluminum matrix alloy is facilitated.
Inventors
- 👤 Thomas B. Cameron
- 👤 Wilbur W. Swanson
- 👤 John M. Tartaglia
- 👤 Thomas B. Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:43
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/10; C22C1/1036; C22C1/1047; C22C32/00; C22C32/0047; C22C32/0052; C22C32/0063; C22C47/00; C22C47/08; C22C49/00; C22C49/02; C22C49/04; C22C49/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
147 words
The process for introducing particulate silicon carbide into molten aluminum or aluminum alloy which comprises mixing particulate silicon carbide from the group consisting of particles having an average size of about 5 to about 70 microns and fibers having an average diameter of about 0.1 to about 15 microns and a length of about 10 microns to about 5 centimeters with a dehydrated addition agent of sodium tetraborate in weight proportions of 1:1 to 2:1, introducing the resulting mixture into an aluminum or aluminum alloy bath at a temperature above the liquidus temperature of the bath in an amount of about 5% to about 40% of silicon carbide, by volume of said bath to disseminate said silicon carbide particles throught said bath and solidifying said bath to produce a composite material reinforced with silicon carbide particles or whiskers distributed in a matrix of aluminum or aluminum alloy.
Claim 2
Dependent Claim
147 words
The process for introducing particulate silicon carbide into molten aluminum or aluminum alloy which comprises mixing particulate silicon carbide from the group consisting of particles having an average size of about 5 to about 70 microns and fibers having an average diameter of about 0.1 to about 15 microns and a length of about 10 microns to about 5 centimeters with a dehydrated addition agent of sodium tetraborate in weight proportions of 1:1 to 2:1, introducing the resulting mixture into an aluminum or aluminum alloy bath at a temperature above the liquidus temperature of the bath in an amount of about 5% to about 40% of silicon carbide, by volume of said bath to disseminate said silicon carbide particles throught said bath and solidifying said bath to produce a composite material reinforced with silicon carbide particles or whiskers distributed in a matrix of aluminum or aluminum alloy.
Claim 3
Dependent Claim
22 words
The process in accordance with claim 1 wherein said silicon carbide and said addition agent are mixed in approximately equal weight proportions.
Claim 4
Dependent Claim
51 words
The method in accordance with claim 1, wherein said aluminum-base alloy consists essentially of, by weight, up to about 7% copper, up to about 20% silicon, up to about 11% magnesium, up to about 9% zinc, up to about 23% tin, up to about 3% iron and the balance essentially aluminum.
Claim 5
Dependent Claim
14 words
The method in accordance with claim 1 wherein said mixing is accomplished by stirring.
Claim 6
Dependent Claim
17 words
The method in accordance with claim 1 wherein said mixed bath is cast into a static mold.
Claim 7
Dependent Claim
16 words
The method in accordance with claim 1 wherein said mixed bath is solidified by continuous casting.
Claim 8
Dependent Claim
18 words
The method in accordance with claim 1 wherein said mixed bath is solidified by direct chill (semi-continuous) casting.
References Cited (Backward Citations)
GB456462A
Cited
US2793949A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |