Medium to high entropy alloys and methods of making the same
AssigneeLehigh University
InventorsHelen M. CHAN, Animesh KUNDU, Madison GIANELLE
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Abstract
Medium to high entropy alloys and methods for producing the same are disclosed herein. In accordance with a first aspect, provided is a method for producing a medium to high entropy alloy. The method may comprise mixing a feed composition to obtain a metal oxide mixture, wherein the feed composition comprises four or more metal oxides selected from alkali metal oxides, alkaline carth metal oxides, lanthanoid oxides, actinoid oxides, transition metal oxides, post-transition metal oxides, or a combination of two or more thereof: and reducing the metal oxide mixture to produce a medium to high entropy alloy.
Claims32
A method for producing a medium to high entropy alloy, the method comprising:
- mixing a feed composition to obtain a metal oxide mixture, wherein the feed composition comprises four or more metal oxides selected from alkali metal oxides, alkaline earth metal oxides, lanthanoid oxides, actinoid oxides, transition metal oxides, post-transition metal oxides, or a combination of two or more thereof;
- heat treating of the metal oxide mixture by annealing at a temperature of about 900 to about 1600° C. for an annealing time of about 10 to about 260 hours in an atmosphere comprising hydrogen and at least one of nitrogen, argon, or a combination thereof.
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The method according to laim 1 further comprising:
- milling the metal oxide mixture prior to heat treatment for about 1 to about 30 hours.
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A medium to high entropy alloy comprising:
- a composition comprising a plurality of metals comprising four or more metals present in a mass fraction of about 0.05 or more;
- and
- a microstructure comprising a metal phase, a metal oxide phase, or a combination thereof.
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A method for producing a medium to high entropy alloy, the method comprising:
- mixing a feed composition to obtain a metal oxide mixture, wherein the feed composition comprises four or more metal oxides selected from alkali metal oxides, alkaline earth metal oxides, lanthanoid oxides, actinoid oxides, transition metal oxides, post-transition metal oxides, or a combination of two or more thereof;
- and
- reducing the metal oxide mixture to produce a medium to high entropy alloy.
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Dependencies are inferred from the claim text.