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

Patent metadata

Field	Value
Publication number	US-10337088-B2
Application number	US-201615077819-A
Country	US
Kind code	B2
Filing date	Mar 22, 2016
Priority date	Apr 20, 2009
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

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 element to form a mixture;
wherein the at least one element is selected from the group consisting of molybdenum, chromium, tungsten, boron, gadolinium, nickel, phosphorus, and yttrium; and
wherein the at least one element is present in the mixture in an amount ranging from about 5 atomic percent (at %) to about 55 at %; and

ball milling the mixture at least until an amorphous alloy of the amorphous iron-based alloy and the at least one element is formed; and
wherein the amorphous iron-based alloy comprises:
between about 10 atomic percent (at %) and about 50 at % iron;
between about 0 at % and about 25 at % of a material selected from a group consisting of manganese, carbon, silicon, zirconium, and titanium;
between about 15 at % and about 30 at % of the at least one element; and
at least one of the following constituents:
between about 20 at % and about 55 at % chromium; and
between about 20 at % and about 55 at % boron.

2. The method of claim 1 , wherein the at least one element is molybdenum.

3. The method of claim 1 , wherein the at least one constituent is boron.

4. The method of claim 1 , wherein the at least one constituent is chromium.

5. A method, comprising:
combining an amorphous iron-based alloy and at least one element to form a mixture;
wherein the at least one element is selected from the group consisting of: molybdenum, chromium, tungsten, boron, gadolinium, nickel, phosphorus, and yttrium, and
wherein the at least one element is present in the mixture in an amount ranging from about 5 atomic percent (at %) to about 55 at %; and

ball milling the mixture at least until an amorphous alloy of the amorphous iron-based alloy and the at least one element is formed; and
wherein the amorphous iron-based alloy comprises:
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 material selected from the group
consisting of chromium, tungsten, and boron; and

wherein the amorphous iron-based alloy is resistant to corrosion.

6. The method of claim 5 , wherein the iron is present in the mixture at between about 40 at % and about 50 at %.

7. The method of claim 6 , wherein the molybdenum is present in the mixture at between about 12 at % and about 27 at %.

8. The method of claim 5 , wherein an x-ray diffraction pattern of the amorphous iron-based alloy shows no sign of a crystalline form of the molybdenum.

9. A method, comprising:
combining an amorphous iron-based alloy and at least one element to form a mixture;
wherein the at least one element is selected from the group consisting of: molybdenum, chromium, tungsten, boron, gadolinium, nickel, phosphorus, and yttrium, and
wherein the at least one element is present in the mixture in an amount ranging from about 5 atomic percent (at %) to about 55 at %; and

ball milling the mixture at least until an amorphous alloy of the amorphous iron-based alloy and the at least one element is formed; and
wherein the amorphous iron-based alloy comprises:
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 the at least one element; and

wherein the amorphous iron-based alloy is resistant to radiation.

10. The method of claim 9 , wherein the boron is present at between about 20 at % and about 53 at %.

11. A method, comprising:
combining an amorphous iron-based alloy and at least one material to form a mixture, wherein the at least one material is selected from the group consisting of tungsten, gadolinium, nickel, yttrium, and alloys thereof, and wherein the at least one material is present in the mixture in an amount ranging 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 material is formed.

12. The method of claim 11 , wherein the iron-based alloy is a product of atomization.

13. The method of claim 11 , wherein the alloy of the amorphous iron-based alloy and the at least one material is at least 90 at % amorphous.

14. The method of claim 11 , wherein an x-ray diffraction pattern of the alloy of the amorphous iron-based alloy and the at least one material shows no sign of a crystalline form of the at least one material.

15. The method of claim 11 , wherein the amorphous iron-based alloy is characterized by a composition Fe 49.7 Cr 17.7 Mn 1.9 Mo 7.4 W 1.6 C 3.8 Si 2.4 .

16. The method of claim 15 , wherein the alloy of the amorphous iron-based alloy and the at least one material comprises molybdenum present at greater than about 9 at %.

17. The method of claim 11 , wherein the amorphous iron-based alloy is characterized by a composition Fe 49.1 Cr 14.6 Mo 13.9 B 5.9 C 14.0 Si 0.3 Y 1.9 Ni 0.2 .

18. The method of claim 17 , wherein the alloy of the amorphous iron-based alloy and the at least one material comprises boron present at greater than about 8 at %.

Assignees

• L Livermore Nat Security Llc

Inventors

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

Classifications

• B22F2009/041

  by mechanical alloying, e.g. blending, milling · CPC title

• B22F9/005

  Transformation into amorphous state by milling · CPC title

• B22F2301/35

  Iron · CPC title

• B22F9/002

  amorphous or microcrystalline · CPC title

• B22F2009/043

  by ball milling · CPC title