EP0219628A1
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Rapidly solidified high strength, corrosion resistant magnesium base metal alloys
Assignee: Honeywell International Inc
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Filing: 1986-08-02
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Granted: —
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Expires: 2006-08-02
Abstract
Abstract A rapidly solidified magnesium based alloy contains finely dispersed magnesium intermetallic phases, and consisting of0 to 15 atom percent of aluminum...(with the sum ranging between 2 and 15 percent)0 to 4 atom percent of zinc...(with the sum ranging between 2 and 15 percent)0,2 to 3 atom percent of at least one element selected from the following group: manganese, cerium, neodymium, paraseodymium, yttrium, silverbalance magnesium.The alloy can be made in the form of a filament or a powder and is especially suited for consolidation into bulk shapes having superior mechanical properties and corrosion resistance.
Inventors
- 👤 Santosh Kumar C/O Allied Corporation Das
- 👤 Chin-Fong C/O Allied Corporation Chang
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:50
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/0408; B; B22; B22F; B22F9/00; B22F9/002; B22F9/008; C22C45/00; C22C45/005; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
93 words
A rapidly solidified magnesium based alloy consisting essentially of the formula Mg bal Al a Zn b X c , wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, praseodymium, yttrium and silver, "a" ranges from about 0 to l5 atom percent, "b" ranges from about 0 to 4 atom percent, "c" ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to l5 atom percent.
Claim 2
Dependent Claim
93 words
A rapidly solidified magnesium based alloy consisting essentially of the formula Mg bal Al a Zn b X c , wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, praseodymium, yttrium and silver, "a" ranges from about 0 to l5 atom percent, "b" ranges from about 0 to 4 atom percent, "c" ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to l5 atom percent.
Claim 3
Dependent Claim
14 words
The alloy of claim l wherein said alloy having the form of a ribbon.
Claim 4
Dependent Claim
14 words
The alloy of claim l wherein said alloy having the form of a powder.
Claim 5
Dependent Claim
20 words
The alloy of claim 2 wherein said ribbon has a hardness of at least about l25 kg./mm² at room temperature.
Claim 6
Dependent Claim
20 words
An alloy as recited in claim 2, wherein said ribbon has a thickness ranging from about 25 to l00 µm.
Claim 7
Dependent Claim
14 words
An alloy as recited in claim 2, wherein said ribbon is a continuous strip.
Claim 8
Dependent Claim
35 words
An alloy as recited in claim l wherein said alloy, when immersed in a 3 percent NaCl aqueous solution at 25°C for 96 hours, has a corrosion rate of less than 50 mils per year.
Claim 9
Independent Claim
154 words
A method for making a magnesium containing alloy having a composition consisting essentially of the formula Mg bal Al a Zn b X c , wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, paraseodymium, yttrium and silver, "a" ranges from about 0 to l5 atom percent, "b" ranges from about 0 to 4 atom percent, "c" ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to l5 atom percent, said method comprising the steps of: a) forming a melt of said alloy in a protective environment; and b) quenching said melt in said protective environment at a rate of at least about l0⁵°C/sec by directing said melt into contact with a rapidly moving chilled surface to form thereby a rapidly solidified ribbon of said alloy.
Claim 10
Independent Claim
154 words
A method for making a magnesium containing alloy having a composition consisting essentially of the formula Mg bal Al a Zn b X c , wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, paraseodymium, yttrium and silver, "a" ranges from about 0 to l5 atom percent, "b" ranges from about 0 to 4 atom percent, "c" ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to l5 atom percent, said method comprising the steps of: a) forming a melt of said alloy in a protective environment; and b) quenching said melt in said protective environment at a rate of at least about l0⁵°C/sec by directing said melt into contact with a rapidly moving chilled surface to form thereby a rapidly solidified ribbon of said alloy.
Claim 11
Dependent Claim
43 words
The method of claim 8 additionally comprising the step of comminuting said ribbon to form a powder comprising platelets having an average thickness of less than l00 µm, said platelets being characterized by irregular shapes resulting from fracture of the ribbon during comminution.
Claim 12
Dependent Claim
109 words
l0. The method of claim 9, further comprising the step of forming said powder into a consolidated body by the application thereto of pressure, said alloy having a microstructure and said consolidated body being heated to a temperature in the range of l50°C to 300°C for a time such that the microstructure has average primary grain size of less than about l0 µm with substantially uniform dispersion of ultrafine precipitates of intermetallic phases formed between magnesium and one or more of said elements from the group X consisting of manganese, cerium, neodymium, paraseodymium yttrium and silver, said ultrafine precipitates having a characteristic size of less than about 0.5 µm.
Claim 13
Dependent Claim
62 words
A metal article consolidated as recited in claim l0, wherein said article is composed of magnesium solid solution phase containing a substantially uniform distribution of dispersed, intermetallic phase precipitates formed between magnesium and at least one element of the group X consisting of manganese, cerium, neodymium, paraseodymium, yttrium and silver, said precipitates having a characteristic size of less than about 0.5 µm.
References Cited (Backward Citations)
EP0166917A1
Cited
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