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US4744945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing alloy including fine oxide particles
Assignee: Toyota Motor Corp
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Filing: 1986-07-28
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Granted: 1988-05-17
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Expires: 2006-07-28
Abstract
Abstract In this method for making an alloy of a first metal and a second metal which has a stronger tendency to form an oxide than the first metal, a powdered solid is prepared comprising at least one of a compound of the first metal with oxygen and the second metal, the compound is mixed with the second metal, and an alloying process is carried out of alloying a melt with the powdered solid, in which the second metal is oxidized by the oxygen of the compound of the first metal with oxygen which is reduced. The compound of the first metal with oxygen may be an oxide, and may be a simple oxide or a compound oxide. As one variation, the powdered solid may contain the compound of the first metal with oxygen, in which case the melt will contain the second metal; or alternatively the powdered solid may contain the second metal, in which case the melt will contain the compound of the first metal with oxygen. Alternatively, the powdered solid may contain both the compound of the first metal with oxygen and the second metal, in which case the melt may contain a third metal.
Inventors
- 👤 Kaneo Hamajima
- 👤 Tadashi Dohnomoto
- 👤 Atsuo Tanaka
- 👤 Masahiro Kubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:13
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/10; C22C1/1036
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
240 words
A method for making an alloy of a first metal and a second metal having a fine distribution of an oxide of said second metal in a matrix of said alloy, said second metal having a stronger tendency to form an oxide than said first metal, comprising: (a) preparing a powder comprising an oxide of said first metal; (b) forming a porous preform having interstices from said powder; (c) placing said porous preform in a bath of molten metal comprising said second metal; (d) pressurizing said bath of molten metal so as to infiltrate said molten metal into the interstices of said porous preform; (e) reducing said oxide of said first metal by said second metal while forming thereby an oxide of said second metal; and wherein the second metal in a mass of said molten metal infiltrated into the interstices of said porous preform has a greater tendency to form an oxide than the first metal of said first metal oxide in said porous preform so that said porous preform and said mass of molten metal infiltrated into the interstices of said porous preform form said alloy, with said first metal thus reduced being alloyed with a first part of said second metal in said mass of molten metal while a second part of the second metal in said mass molten metal forms said oxide thereof, which oxide is finely distributed in the matrix of said alloy thus formed.
Claim 2
Independent Claim
240 words
A method for making an alloy of a first metal and a second metal having a fine distribution of an oxide of said second metal in a matrix of said alloy, said second metal having a stronger tendency to form an oxide than said first metal, comprising: (a) preparing a powder comprising an oxide of said first metal; (b) forming a porous preform having interstices from said powder; (c) placing said porous preform in a bath of molten metal comprising said second metal; (d) pressurizing said bath of molten metal so as to infiltrate said molten metal into the interstices of said porous preform; (e) reducing said oxide of said first metal by said second metal while forming thereby an oxide of said second metal; and wherein the second metal in a mass of said molten metal infiltrated into the interstices of said porous preform has a greater tendency to form an oxide than the first metal of said first metal oxide in said porous preform so that said porous preform and said mass of molten metal infiltrated into the interstices of said porous preform form said alloy, with said first metal thus reduced being alloyed with a first part of said second metal in said mass of molten metal while a second part of the second metal in said mass molten metal forms said oxide thereof, which oxide is finely distributed in the matrix of said alloy thus formed.
Claim 3
Dependent Claim
22 words
A method for making an alloy according to claim 1, wherein said compound of said first metal with oxygen is an oxide.
Claim 4
Dependent Claim
23 words
A method for making an alloy according to claim 1, wherein said compound of said first metal with oxygen is a simple oxide.
Claim 5
Dependent Claim
23 words
A method for making an alloy according to claim 1, wherein said compound of said first metal with oxygen is a compound oxide.
Claim 6
Dependent Claim
30 words
A method for making an alloy according to claim 1, wherein said powdered solid comprises said compound of said first metal with oxygen, and said melt contains said second metal.
Claim 7
Dependent Claim
30 words
A method for making an alloy according to claim 1, wherein said powdered solid comprises said second metal, and said melt comprises said compound of said first metal with oxygen.
Claim 8
Dependent Claim
28 words
A method for making an alloy according to claim 1, wherein said powdered solid comprises both said compound of said first metal with oxygen and said second metal.
Claim 9
Dependent Claim
30 words
A method for making an alloy according to claim 1, wherein a porous solid including said powdered solid is formed, and the melt is caused to permeate said porous solid.
Claim 10
Dependent Claim
57 words
A method for making an alloy according to claim 1, wherein a porous solid including a mixture of a powdered solid formed of said compound of said first metal with oxygen and a powdered solid formed of said second metal is formed, and the melt, which comprises a third metal, is caused to permeate said porous solid.
Claim 11
Dependent Claim
24 words
The method of making an alloy according to claim 1, wherein said alloy is a Mo-Al alloy having Al 2 O 3 dispersed therein.
Claim 12
Dependent Claim
24 words
The method of making an alloy according to claim 1, wherein said alloy is a Co-Zn-Al alloy having Al 2 O 3 dispersed therein.
Claim 13
Dependent Claim
21 words
The method of making an alloy according to claim 1, wherein said alloy is a Mn-Zn alloy having ZnO dispersed therein.
Claim 14
Dependent Claim
21 words
The method of making an alloy according to claim 1, wherein said alloy is a Mn-Mg alloy having MgO dispersed therein.
Claim 15
Dependent Claim
21 words
The method of making an alloy according to claim 1, wherein said alloy is a Ti-Mg alloy having MgO dispersed therein.
Claim 16
Dependent Claim
24 words
The method of making an alloy according to claim 1, wherein said alloy is a Ni-Fe-Al alloy having Al 2 O 3 dispersed therein.
Claim 17
Dependent Claim
27 words
The method of making an alloy according to claim 1, wherein said alloy is a Co-Si-Al alloy having Al 2 O 3 and SiO 2 dispersed therein.
Claim 18
Dependent Claim
24 words
The method of making an alloy according to claim 1, wherein said alloy is a Fe-Al-B alloy having Al 2 O 3 dispersed therein.
Claim 19
Dependent Claim
22 words
The method of making an alloy according to claim 1, wherein said alloy is a Ti-Ni-V alloy having TiO 2 dispersed therein.
Claim 20
Dependent Claim
24 words
The method of making an alloy according to claim 1, wherein said alloy is a Zn-Al alloy having Al 2 O 3 dispersed therein.
Claim 21
Dependent Claim
24 words
The method of making an alloy according to claim 1, wherein said alloy is a Al-V-Sn alloy having Al 2 O 3 dispersed therein.
Claim 22
Dependent Claim
24 words
The method of making an alloy according to claim 1, wherein said alloy is a Mn-Al-Zn alloy having Al 2 O 3 dispersed therein.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |