Iron-based amorphous alloys and methods of synthesizing iron-based amorphous alloys

Patent metadata

Field	Value
Publication number	US-2016201176-A1
Application number	US-201615077819-A
Country	US
Kind code	A1
Filing date	Mar 22, 2016
Priority date	Apr 20, 2009
Publication date	Jul 14, 2016
Grant date	—

Abstract

A method according to one embodiment includes combining an amorphous iron-based alloy and at least one metal selected from a group consisting of molybdenum, chromium, tungsten, boron, gadolinium, nickel phosphorous, yttrium, and alloys thereof to form a mixture, wherein the at least one metal is present in the mixture from about 5 atomic percent (at %) to about 55 at %; and ball milling the mixture at least until an amorphous alloy of the iron-based alloy and the at least one metal is formed. Several amorphous iron-based metal alloys are also presented, including corrosion-resistant amorphous iron-based metal alloys and radiation-shielding amorphous iron-based metal alloys,

First claim

What is claimed is:

1 . A method, comprising:
combining an amorphous iron-based alloy and at least one metal selected from a group consisting of molybdenum, chromium, tungsten, boron, gadolinium, nickel phosphorous, yttrium, and alloys thereof to form a mixture, wherein the at least one metal is present in the mixture from about 5 atomic percent (at %) to about 55 at %; and ball milling the mixture at least until an amorphous alloy of the iron-based alloy and the at least one metal is formed.

2 . The method of claim 1 , wherein the iron-based alloy is a product of atomization.

3 . The method of claim 1 , wherein the amorphous alloy of the iron-based alloy and the at least one metal is at least 90 at % amorphous.

4 . The method of claim 1 , wherein an x-ray diffraction pattern of the amorphous alloy of the iron-based alloy and the at least one metal shows no sign of a crystalline form of the at least one metal.

5 . The method of claim 1 , wherein the amorphous iron-based alloy is SAM2X5.

6 . The method of claim 5 , wherein the amorphous alloy of the iron-based alloy and the at least one metal comprises molybdenum present at greater than about 9 at %.

7 . The method of claim 5 , wherein the molybdenum is present at between about 12 at % and about 27 at %.

8 . The method of claim 1 , wherein the amorphous iron-based alloy is SAM1651.

9 . The method of claim 8 , wherein the amorphous alloy of the iron-based alloy and the at least one metal comprises boron present at greater than about 8 at %.

10 . The method of claim 9 , wherein the boron is present at between about 10 at % and about 53 at %.

11 . An amorphous iron-based metal alloy, comprising:
between about 10 atomic percent (at %) and about 50 at % iron; between about 0 at % and about 25 at % of a metal selected from a group consisting of manganese, carbon, silicon, zirconium, and titanium; and at least one of the following constituents: between about 15 at % and about 30 at % of at least one metal selected from a group consisting of molybdenum, tungsten, gadolinium, nickel phosphorous, yttrium, and alloys thereof; between about 20 at % and about 55 at % chromium; and between about 20 at % and about 55 at % boron.

12 . The amorphous iron-based metal alloy of claim 11 , wherein the at least one constituent is molybdenum, wherein the molybdenum is present in the alloy at between about 15 at % and about 30 at %.

13 . The amorphous iron-based metal alloy of claim 11 , wherein the at least one constituent is boron.

14 . The amorphous iron-based metal alloy of claim 11 , wherein the at least one constituent is chromium.

15 . A corrosion-resistant amorphous iron-based metal alloy, comprising:
between about 10 atomic percent (at %) and about 50 at % iron; between about 15 at % and about 25 at % molybdenum; and between about 0 at % and about 25 at % of a metal selected from a group consisting of chromium, manganese, tungsten, carbon, boron, silicon, zirconium, and titanium.

16 . The corrosion-resistant amorphous iron-based metal alloy of claim 15 , wherein the iron is present at between about 40 at % and about 50 at %.

17 . The corrosion-resistant amorphous iron-based metal alloy of claim 16 , wherein the molybdenum is present at between about 12 at % and about 27 at %.

18 . The corrosion-resistant amorphous iron-based metal alloy of claim 15 , wherein an x-ray diffraction pattern of the corrosion-resistant amorphous iron-based metal alloy shows no sign of a crystalline form of the molybdenum.

19 . A radiation-shielding amorphous iron-based metal alloy, comprising:
between about 10 atomic percent (at %) and about 50 at % iron; between about 10 at % and about 55 at % boron; and between about 0 at % and about 25 at % of a metal selected from a group consisting of chromium, manganese, molybdenum, tungsten, carbon, silicon, zirconium, and titanium.

20 . The radiation-shielding amorphous iron-based metal alloy of claim 19 , wherein the boron is present at between about 20 at % and about 53 at %.

Assignees

• L Livermore Nat Security Llc

Inventors

• Saw Cheng Kiong
• Bauer William A
• Choi Jor-Shan
• Day Sumner Daniel
• Farmer Joseph C

Classifications

• C22C45/006

  with Cr as the major constituent · CPC title

• C22C33/003 Primary

  making amorphous alloys · CPC title

• B22F9/005

  Transformation into amorphous state by milling · CPC title

• B22F9/002

  amorphous or microcrystalline · CPC title

• G21F1/08

  Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals · CPC title