BASE METAL ALLOYS WITH IMPROVED CONDUCTIVE PROPERTIES, METHODS OF MANUFACTURE, AND USES THEREOF

• US 20120263971A1
• Filed: 10/07/2011
• Published: 10/18/2012
• Est. Priority Date: 10/08/2010
• Status: Abandoned Application

• Current Assignee: University of Connecticut (State of Connecticut)
• Original Assignee: University of Connecticut (State of Connecticut)
• Inventors: AINDOW, Mark, ALPAY, S. Pamir, MANTESE, Joseph V.
• Application Number:
  US13/269,076
• Publication Number:
  US 20120263971A1
• Time in Patent Office: Days
• US Class Current: 428/681
• CPC Class Codes: C22C 38/00 Ferrous alloys, e.g. steel alloys cast-iron alloys C22C37/00
• CPC Class Codes: C22C 38/04 containing manganese
• CPC Class Codes: C22C 38/12 containing tungsten, tantalum, molybdenum, vanadium, or niobium
• CPC Class Codes: Y10T 428/12951 Fe-base component
• CPC Class Codes: Y10T 428/31678 Of metal

Abstract

A composition comprises a binary alloy of iron and one of manganese, molybdenum, or vanadium, wherein the manganese, molybdenum, or vanadium is present in the binary alloy in an amount effective to form a conductive oxide on the binary alloy, the oxidation state of the manganese, the molybdenum, and the vanadium is greater than the oxidation state of iron in the conductive oxide, and the conductive oxide has a contact resistance of less than 5×10⁴ milli-ohms measured in accordance with ASTM B667-97 (2009).

Claims

1. A composition comprising

a binary alloy of

iron and

one of manganese, molybdenum, or vanadium,

wherein the manganese, molybdenum, or vanadium is present in the binary alloy in an amount effective to form a conductive oxide on the binary alloy,

the oxidation state of the manganese, molybdenum, and vanadium is greater than the oxidation state of the iron in the conductive oxide, and

the conductive oxide has a contact resistance less than 5×

10⁴ milli-ohms measured in accordance with ASTM B667-97 (2009).

2. The composition of claim 1, wherein the manganese is present in an amount from 1 at. % to 10 at. % Mn.

3. The composition of claim 2, wherein the manganese is present in an amount from 1 at. % to 5 at. % Mn.

4. The composition of claim 3, wherein the manganese is present in an amount from 3 at. % to 5 at. % Mn.

5. The composition of claim 1, wherein the molybdenum is present in an amount from 1 at. % to 10 at. % Mo.

6. The composition of claim 5, wherein the molybdenum is present in an amount from 1 at. % to 5 at. % Mo.

7. The composition of claim 6, wherein the molybdenum is present in an amount from 1 to 3 at. % Mo.

8. The composition of claim 1, wherein the vanadium is present in an amount from 1 at. % to 30 at. % V.

9. The composition of claim 8, wherein the vanadium is present in an amount from 4 at. % to 20 at. % V.

10. The composition of claim 9, wherein the vanadium is present in an amount from 8 at. % to 12 at. % V.

11. The composition of claim 1, wherein the binary alloy is a single phase.

12. The composition of claim 1, wherein the binary alloy is a solid solution of the manganese, molybdenum, or vanadium in the iron.

13. The composition of claim 1, wherein the binary alloy has a bulk resistivity from 25 nano-ohm-meters to 500 nano-ohm-meters.

14. The composition of claim 1, wherein the binary alloy has a bulk resistivity from 50 nano-ohm-meters to 500 nano-ohm-meters.

15. The composition of claim 1, further comprising the conductive oxide of the binary alloy.

16. The composition of claim 15, wherein the conductive oxide is a single phase, and the manganese, molybdenum, or vanadium is substitutionally incorporated into a lattice of the conductive oxide.

17. The composition of claim 16, wherein a contact resistance of the composition is less than 5×

10⁴ milli-ohms.

18. The composition of claim 15, wherein the manganese, molybdenum, or vanadium in the conductive oxide is present in an amount effective to change a relative amount of Fe²⁺ and Fe³⁺ in the conductive oxide.

19. A process of making the binary alloy of claim 1, comprising alloying iron and one of manganese, molybdenum, or vanadium to form the binary alloy.

20. A process of making the composition of claim 1, comprising:

alloying iron and one of manganese, molybdenum, or vanadium to form the binary alloy; and

maintaining the binary alloy under a condition effective to oxidize at least a portion of the binary alloy to form the conductive oxide.

21. An electrical device comprising:

a first component and a second component in a spaced apart relation; and

the composition of claim 1 disposed between and in physical contact with the first component and the second component,

wherein the composition completes an electrical path between the first component and the second component.

22. An electrical device comprising:

a metal substrate; and

a coating comprising the composition of claim 1 disposed on the metal substrate and in electrical contact with the metal substrate.

23. The electrical device of claim 22, further comprising a metallic member to electrically contact the coating.

24. The electrical device of claim 23, wherein the electrical device is a blade connector, push-on connector, crimp connector, multi-pin connector, bolt connector, set screw connector, lug, wedge connector, bolted connector, compression connector, coaxial connector, wall connector, surface mount technology board connector, IPC connector, DIN connector, phone connector, plastic leaded chip carrier socket or surface mount connector, integrated circuit connector, ball grid array connector, staggered pin grid array connector, or bus bar connector.

25. The electrical device of claim 23, wherein the electrical device is a circuit breaker, mercury switch, wafer switch, dual-inline package (DIP) switch, reed switch, wall switch, toggle switch, in-line switch, rocker switch, microswitch, or a rotary switch.

26. An article comprising the electrical device of claim 20.