Patent US4468272A successfully refreshed from Google Patents.
US4468272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material manufacturing method exothermically reducing metallic oxide in binder by element in matrix metal
Assignee: Toyota Motor Corp
•
Filing: 1983-08-24
•
Granted: 1984-08-28
•
Expires: 2003-08-24
Abstract
Abstract First a quantity of reinforcing material is formed into a shaped mass bound together by an inorganic binder. Next, this shaped mass is compounded with a quantity of a molten matrix metal by a pressure casting method. The molten matrix metal includes a quantity of a certain element with a strong tendency to become oxidized, and the inorganic binder includes a metallic oxide which, when brought into contact at high temperature with this certain element, is reduced thereby in an exothermic reaction. Thus, during the pressure casting, extra heat is produced as the certain element reduces the metallic oxide, and this aids good penetration of the matrix metal into the interstices of the reinforcing material. The metal remaining from the oxide is dispersed in the matrix metal. This metallic oxide may be silica, zirconia, chromium oxide, yttrium oxide, cerium oxide, ferric oxide, zirconium silicate, antimony oxide, or a mixture thereof; and the certain element may be lithium, calcium, magnesium, aluminum, beryllium, titanium, zirconium, or a mixture thereof.
Inventors
- 👤 Tadashi Donomoto
- 👤 Yoshiaki Tatematsu
- 👤 Atsuo Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:08
CPC Classifications
B; B22; B22D; B22D19/00; B22D19/14; B22D17/00; C; C22; C22C; C22C47/00; C22C47/08; C22C47/10; C22C49/00; C22C49/02; C22C49/04; B22F; B22F2998/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
92 words
A method for making a composite material, in which: first a quantity of reinforcing material is formed into a shaped mass bound together by an inorganic binder; and then this shaped mass is compounded with a quantity of a molten matrix metal by a pressure casting method; said molten matrix metal including a quantity of a certain element with a strong tendency to become oxidized; and said inorganic binder including a metallic oxide which, when brought into contact at high temperature with said certain element, is reduced thereby in an exothermic reaction.
Claim 2
Independent Claim
92 words
A method for making a composite material, in which: first a quantity of reinforcing material is formed into a shaped mass bound together by an inorganic binder; and then this shaped mass is compounded with a quantity of a molten matrix metal by a pressure casting method; said molten matrix metal including a quantity of a certain element with a strong tendency to become oxidized; and said inorganic binder including a metallic oxide which, when brought into contact at high temperature with said certain element, is reduced thereby in an exothermic reaction.
Claim 3
Dependent Claim
44 words
A method for making a composite material according to claim 1, wherein said metallic oxide is one chosen from the group consisting of silica, zirconia, chromium oxide, yttrium oxide, cerium oxide, ferric oxide, zirconium silicate, antimony oxide, or is a mixture of several thereof.
Claim 4
Dependent Claim
44 words
A method for making a composite material according to claim 1, wherein said certain element with a strong tendency to become oxidized is one chosen from the group consisting of lithium, calcium, magnesium, aluminum, beryllium, titanium, zirconium, or is a mixture of several thereof.
Claim 5
Dependent Claim
18 words
A method for making a composite material according to claim 1, wherein said metallic oxide is chromium oxide.
Claim 6
Dependent Claim
24 words
A method for making a composite material according to claim 4, wherein said certain element with a strong tendency to become oxidized is magnesium.
Claim 7
Dependent Claim
25 words
A method for making a composite material according to claim 5, wherein said matrix metal is aluminum alloy and said reinforcing material is alumina fibers.
Claim 8
Dependent Claim
18 words
A method for making a composite material according to claim 1, wherein said metallic oxide is ferric oxide.
Claim 9
Dependent Claim
24 words
A method for making a composite material according to claim 7, wherein said certain element with a strong tendency to become oxidized is magnesium.
Claim 10
Dependent Claim
26 words
A method for making a composite material according to claim 8, wherein said matrix metal is aluminum alloy and said reinforcing material is silicon carbide whiskers.
Claim 11
Dependent Claim
17 words
A method for making a composite material according to claim 1, wherein said metallic oxide is silica.
Claim 12
Dependent Claim
24 words
A method for making a composite material according to claim 10, wherein said certain element with a strong tendency to become oxidized is magnesium.
Claim 13
Dependent Claim
25 words
A method for making a composite material according to claim 11, wherein said matrix metal is aluminum alloy and said reinforcing material is alumina fibers.
Claim 14
Dependent Claim
22 words
A method for making a composite material according to claim 1, wherein the pressure casting method is a high pressure casting method.
Claim 15
Dependent Claim
45 words
A method for making a composite material according to claim 1, wherein enough of said certain element with a strong tendency to become oxidized is included within said molten matrix metal to completely reduce substantially all of said metallic oxide included in said inorganic binder.
References Cited (Backward Citations)
US3550247A
Cited
US3816158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |