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

Patent metadata

Field	Value
Publication number	US-9328404-B2
Application number	US-42676909-A
Country	US
Kind code	B2
Filing date	Apr 20, 2009
Priority date	Apr 20, 2009
Publication date	May 3, 2016
Grant date	May 3, 2016

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. An amorphous iron-based alloy, comprising:
between about 10 atomic percent (at %) and about 50 at % iron;
from 0 at % to about 25 at % of a material selected from a group consisting of manganese, carbon, silicon, zirconium, and titanium; and
at least two of the following constituents:
between about 5 at % and about 30 at % of at least one material selected from a group consisting of molybdenum, tungsten, gadolinium, nickel phosphorous, yttrium, and alloys thereof;
between about 20 at % and about 55 at % chromium;
between about 30 at % and about 55 at % boron
wherein the at least two constituents comprise the molybdenum; and
wherein the molybdenum is present in the alloy at between about 15 at % and about 30 at %.

2. The amorphous iron-based alloy of claim 1 , wherein the at least two constituents comprise the boron and the chromium.

3. The amorphous iron-based alloy of claim 1 , wherein the at least two constituents comprise the chromium and the at least one material selected from the group consisting of tungsten, gadolinium, nickel, phosphorous, yttrium, and alloys thereof.

4. The amorphous iron-based alloy of claim 1 , wherein the material selected from the group consisting of manganese, carbon, silicon, zirconium, and titanium is present at greater than 0 at %.

5. A corrosion-resistant amorphous iron-based alloy, comprising:
between about 10 atomic percent (at %) and about 50 at % iron;
between about 5 at % and about 25 at % molybdenum;
from about 15 at % to about 25 at % of a material selected from a group consisting of manganese, tungsten, and zirconium, and
wherein an x-ray diffraction pattern of the corrosion-resistant amorphous iron-based alloy shows no sign of a crystalline form.

6. The corrosion-resistant amorphous iron-based alloy of claim 5 , wherein the iron is present at between about 40 at % and about 50 at %.

7. The corrosion-resistant amorphous iron-based alloy of claim 6 , wherein the molybdenum is present at between about 17 at % and about 25 at %.

8. The corrosion-resistant amorphous iron-based alloy of claim 5 , wherein the material is the zirconium,
and
wherein amorphous iron-based alloy further comprises boron present in an amount between about 30 at % and about 55 at %.

9. A radiation-shielding amorphous iron-based alloy, comprising:
between about 10 atomic percent (at %) and about 50 at % iron;
between about 30 at % and about 55 at % boron; and
from 0 at % to about 55 at % of a material selected from a group consisting of chromium, manganese, molybdenum, tungsten, carbon, silicon, zirconium, and titanium.

10. The radiation-shielding amorphous iron-based alloy of claim 9 , wherein the iron is present at between about 25 at % and about 40 at %.

11. The radiation-shielding amorphous iron-based alloy of claim 10 , wherein the boron is present at between about 30 at % and about 53 at %.

12. The radiation-shielding amorphous iron-based alloy of claim 9 , wherein the material is the chromium, and
wherein the chromium is present in an amount from about 30 at % to about 55 at %.

13. The amorphous iron-based alloy of claim 9 , wherein the material is the molybdenum, and
wherein the molybdenum is present in an amount from about 5 at % to about 25 at %.

14. A corrosion-resistant amorphous iron-based alloy, comprising:
between about 10 atomic percent (at %) and about 50 at % iron;
from 0 at % to 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 at least one material 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,
wherein an x-ray diffraction pattern of the corrosion-resistant amorphous iron-based alloy shows no sign of a crystalline form.

Assignees

• Saw Cheng Kiong
• Bauer William A
• Choi Jor-Shan
• Day Dan
• Farmer Joseph C
• L Livermore Nat Security Llc

Inventors

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

Classifications

• B22F9/005

  Transformation into amorphous state by milling · CPC title

• C22C2200/02

  Amorphous · CPC title

• C22C33/003 Primary

  making amorphous alloys · CPC title

• C22C45/02

  with iron as the major constituent · CPC title

• B22F2009/043

  by ball milling · CPC title