US4777097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material including alumina-silica short fiber reinforcing material and aluminum alloy matrix metal with moderate copper and magnesium contents
Assignee: Toyota Motor Corp
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Filing: 1987-01-28
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Granted: 1988-10-11
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Expires: 2007-01-28
Abstract
Abstract A composite material is made from alumina-silica type short fibers embedded in a matrix of metal. The matrix metal is an alloy consisting essentially of from approximately 2% to approximately 6% of copper, from approximately 0.5% to approximately 3.5% of magnesium, and remainder substantially aluminum. The short fibers have a composition of from about 35% to about 80% of Al 2 O 3 and from about 65% to about 20% of SiO 2 with less than about 10% of other included constituents, and may be either amorphous or crystalline, in the latter case optionally containing a proportion of the mullite crystalline form. The fiber volume proportion of the alumina-silica type short fibers is between approximately 5% and approximately 50%, and may more desirably be between approximately 5% and approximately 40%. If the alumina-silica short fibers are formed from amorphous alumina-silica material, the magnesium content of the aluminum alloy matrix metal may desirably be between approximately 0.5% and approximately 3%. And, in the desirable case that the fiber volume proportion of the alumina-silica type short fibers is between approximately 30% and approximately 40%, then the copper content of the aluminum alloy matrix metal is desired to be between approximately 2% and approximately 5.5%.
Inventors
- 👤 Masahiro Kubo
- 👤 Tadashi Dohnomoto
- 👤 Atsuo Tanaka
- 👤 Hidetoshi Hirai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:21
CPC Classifications
C; C22; C22C; C22C49/00; C22C49/02; C22C49/04; C22C49/06; C22C49/14; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
100 words
A composite material comprising a mass of alumina-silica short fibers embedded in a matrix of metal, said alumina-silica short fibers having a composition of from about 35% to about 80% of Al 2 O 3 and from about 65% to about 20% of SiO 2 with less than about 10% of other included constituents; said matrix metal being an alloy consisting essentially of from more than 45% to 6% of copper, from more than 2% to approximately 3.5% of magnesium, and remainder substantially aluminum; and the volume proportion of said alumina-silica short fibers being from about 5% to about 50%.
Claim 2
Dependent Claim
100 words
A composite material comprising a mass of alumina-silica short fibers embedded in a matrix of metal, said alumina-silica short fibers having a composition of from about 35% to about 80% of Al 2 O 3 and from about 65% to about 20% of SiO 2 with less than about 10% of other included constituents; said matrix metal being an alloy consisting essentially of from more than 45% to 6% of copper, from more than 2% to approximately 3.5% of magnesium, and remainder substantially aluminum; and the volume proportion of said alumina-silica short fibers being from about 5% to about 50%.
Claim 3
Dependent Claim
46 words
A composite material according to claim 1, wherein said alumina-silica short fibers have a composition of from about 35% to about 65% of Al 2 O 3 and from about 65% to about 35% of SiO 2 with less than about 10% of other included constituents.
Claim 4
Dependent Claim
46 words
A composite material according to claim 1, wherein said alumina-silica short fibers have a composition of from about 65% to about 80% of Al 2 O 3 and from about 35% to about 20% of SiO 2 with less than about 10% of other included constituents.
Claim 5
Dependent Claim
23 words
A composite material according to claim 1, wherein the volume proportion of said alumina-silica short fibers being from about 5% to about 40%.
Claim 6
Dependent Claim
23 words
A composite material according to claim 2, wherein the volume proportion of said alumina-silica short fibers being from about 5% to about 40%.
Claim 7
Dependent Claim
23 words
A composite material according to claim 3, wherein the volume proportion of said alumina-silica short fibers being from about 5% to about 40%.
Claim 8
Dependent Claim
99 words
A composite material comprising a mass of alumina-silica short fibers embedded in a matrix of metal, said alumina-silica short fibers having a composition of from about 35% to about 80% of Al 2 O 3 and from about 65% to about 20% of SiO 2 with less than about 10% of other included constituents; said matrix metal being an alloy consisting essentially of from approximately 5% to approximately 6% of copper, from approximately 2.0% to approximately 3.5% of magnesium, and remainder substantially aluminum and the volume proportion of said alumina-silica short fibers being from about 5% to about 50%.
Claim 9
Dependent Claim
99 words
A composite material comprising a mass of alumina-silica short fibers embedded in a matrix of metal, said alumina-silica short fibers having a composition of from about 35% to about 80% of Al 2 O 3 and from about 65% to about 20% of SiO 2 with less than about 10% of other included constituents; said matrix metal being an alloy consisting essentially of from approximately 5% to approximately 6% of copper, from approximately 2.0% to approximately 3.5% of magnesium, and remainder substantially aluminum and the volume proportion of said alumina-silica short fibers being from about 5% to about 50%.
Claim 10
Dependent Claim
45 words
The composite material of claim 7, wherein said alumina-silica short fibers have a composition of from about 35% to about 65% of Al 2 O 3 and from about 65% to about 35% of SiO 2 with less than about 10% of other included constituents.
Claim 11
Dependent Claim
45 words
The composite material of claim 7, wherein said alumina-silica short fibers have a composition of from about 65% to about 80% of Al 2 O 3 and from about 35% to about 20% of SiO 2 with less than about 10% of other included constituents.
Claim 12
Dependent Claim
23 words
The composite material according to claim 7, wherein the volume proportion of said alumina-silica short fibers is from about 5% to about 40%.
Claim 13
Dependent Claim
22 words
The composite material of claim 8, wherein the volume proportion of said alumina-silica short fibers is from about 5% to about 40%.
Claim 14
Dependent Claim
22 words
The composite material of claim 9, wherein the volume proportion of said alumina-silica short fibers is from about 5% to about 40%.
Claim 15
Dependent Claim
98 words
A composite material comprising a mass of alumina-silica short fibers embedded in a matrix of metal, said alumina-silica short fibers having a composition of from 35% to about 80% of Al 2 O 3 and from about 65% to about 20% of SiO 2 with less than about 10% of other included constituents; said matrix metal being an alloy consisting of from approximately 2% to approximately 6% of copper, from approximately 0.5% to approximately 3.5% of magnesium, and the remainder substantially aluminum; and the volume proportion of said alumina-silica short fibers being from about 5% to about 50%.
Claim 16
Dependent Claim
98 words
A composite material comprising a mass of alumina-silica short fibers embedded in a matrix of metal, said alumina-silica short fibers having a composition of from 35% to about 80% of Al 2 O 3 and from about 65% to about 20% of SiO 2 with less than about 10% of other included constituents; said matrix metal being an alloy consisting of from approximately 2% to approximately 6% of copper, from approximately 0.5% to approximately 3.5% of magnesium, and the remainder substantially aluminum; and the volume proportion of said alumina-silica short fibers being from about 5% to about 50%.
Claim 17
Dependent Claim
45 words
The composite material of claim 13, wherein said alumina-silica short fibers have a composition of from about 35% to about 60% of Al 2 O 3 and from about 65% to about 35% of SiO 2 with less than about 10% of other included constituents.
Claim 18
Dependent Claim
45 words
The composite material of claim 13, wherein said alumina-silica short fibers have a composition of from about 65% to about 80% of Al 2 O 3 and from about 35% to about 20% of SiO 2 with less than about 10% of other included constituents.
Claim 19
Dependent Claim
22 words
The composite material of claim 13, wherein the volume proportion of said alumina-silica short fibers is from about 5% to about 40%.
Claim 20
Dependent Claim
21 words
The composite material of claim 14, wherein the volume proportion of said alumina-silica fibers is from about 5% to about 40%.
Claim 21
Dependent Claim
22 words
The composite material of claim 15, wherein the volume proportion of said alumina-silica short fibers is from about 5% to about 40%.
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) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |