High-entropy multielement alloys

• US 20020159914A1
• Filed: 04/29/2002
• Published: 10/31/2002
• Est. Priority Date: 11/07/2000
• Status: Abandoned Application

• Current Assignee: National Tsing Hua University
• Original Assignee: National Tsing Hua University
• Inventors: Yeh, Jien-Wei
• Application Number:
  US10/133,495
• Publication Number:
  US 20020159914A1
• Time in Patent Office: Days
• US Class Current: 420/580
• CPC Class Codes: C22C 1/02 by melting C22C1/1036 takes precedence
• CPC Class Codes: C22C 30/00 Alloys containing less than 50% by weight of each constituent

Abstract

The present invention is related to high-entropy multielement alloys. The features of the alloys are that there are five to eleven major metallic elements and with or without minor elements, the minor elements are selected from the element group other than the major metallic elements, the mole fraction of each major metallic element in the alloy is between 5% and 30%, and the mole fraction of each minor element in the alloy is less than 3.5%. The high-entropy multielement alloys in the present invention are high in hardness, heat resistance, and corrosion resistance.

Claims

1. A high-entropy multielement alloy consisting essentially of:

five to eleven major metallic elements, the mole fraction of each major metallic element in the alloy is between 5% and 30%.

2. The high-entropy multielement alloy of claim 1, wherein said major metallic elements are selected from the metallic element group consisting of beryllium, magnesium, aluminum, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, yttrium, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, hafnium, tantalum, tungsten, platinum, gold, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium and terbium.

3. The high-entropy multielement alloy of claim 1, wherein said major metallic elements are selected from the metallic element group consisting of aluminum, titanium, vanadium, chromium, iron, cobalt, nickel, copper, zirconium, molybdenum, palladium, silver and gold.

4. The high-entropy multielement alloy of claim 1, wherein said alloy is produced by an electric arc melting method.

5. The high-entropy multielement alloy of claim 1, wherein said alloy is produced by a rapid solidification method.

6. A high-entropy multielement alloy consisting of:

five to eleven major metallic elements and at least one minor element, said minor elements are selected from the element group other than the major metallic elements, the mole fraction of each major metallic element in the alloy is between 5% and 30%, and the mole fraction of each minor element in the alloy is less than 3.5%.

7. The high-entropy multielement alloy of claim 6, wherein said major metallic elements are selected from the metallic element group consisting of beryllium, magnesium, aluminum, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, yttrium, zirconium, niobium, molybdenum, ruthenium, palladium, silver, hafnium, tantalum, tungsten, platinum, gold, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium and terbium.

8. The high-entropy multielement alloy of claim 6, wherein said major metallic elements are selected from the metallic element group consisting of aluminum, titanium, vanadium, chromium, iron, cobalt, nickel, copper, zirconium, molybdenum, palladium, silver and gold.

9. The high-entropy multielement alloy of claim 6, wherein said minor element is selected from the metallic element group consisting of lithium, beryllium, sodium, magnesium, aluminum, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, gallium, germanium, strontium, yttrium, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, cadmium, indium, tin, antimony, hafnium, tantalum, tungsten, platinum, gold, lead, bismuth, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium and terbium.

10. The high-entropy multielement alloy of claim 6, wherein said minor element is selected from the nonmetallic element group consisting of carbon, boron, silicon, phosphorus, sulfur, hydrogen, oxygen and nitrogen.

11. The high-entropy multielement alloy of claim 6, wherein said alloy is produced by an electric arc melting method.

12. The high-entropy multielement alloy of claim 6, wherein said alloy is produced by a rapid solidification method.