BULK NICKEL-PHOSPHORUS-SILICON GLASSES BEARING MANGANESE

• US 20160047023A1
• Filed: 08/12/2015
• Published: 02/18/2016
• Est. Priority Date: 08/12/2014
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Glassimetal Technology Inc.
• Inventors: Na, Jong Hyun, Duggins, Danielle, Abarca, Oscar, Launey, Maximilien, Demetriou, Marios D., Johnson, William L.
• Granted Patent: US 10,287,663 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C22C 1/11 Making amorphous alloys
• CPC Class Codes: C22C 19/03 based on nickel
• CPC Class Codes: C22C 19/058 without Mo and W
• CPC Class Codes: C22C 45/02 with iron as the major constituent
• CPC Class Codes: C22C 45/04 with nickel or cobalt as the major constituent
• CPC Class Codes: C22F 1/002 by rapid cooling or quenching; cooling agents used therefor
• CPC Class Codes: C22F 1/10 of nickel or cobalt or alloys based thereon

Abstract

The disclosure is directed to Ni—P—Si alloys bearing Mn and optionally Cr, Mo, Nb, and Ta that are capable of forming a metallic glass, and more particularly demonstrate critical rod diameters for glass formation greater than 1 mm and as large as 5 mm or larger.

Claims

1. An alloy capable of forming a metallic glass represented by the following formula (subscripts denote atomic percentages):

Ni_{(100-a-b-c-d)}Mn_aX_bP_cSi_d

where;

a is between 0.25 and 12,

b is up to 20,

c is between 14 and 22,

d is between 0.25 and 5,

and where X is selected from Cr, Mo, Nb, Ta, and combinations thereof.

2. The alloy according to claim 1 where X is selected from Cr and Mo, and combinations thereof, and b is up to 18 percent.

3. The alloy according to claim 1 where X is selected from Nb and Ta, and combinations thereof, and b is up to 6 percent.

4. The alloy according to claim 1 where X is Mo and Nb.

5. The alloy according to claim 4, wherein the atomic concentration of Mo is between 0.5 and 4 atomic percent, and the critical rod diameter of the alloy is at least 1 mm.

6. The alloy according to claim 4, wherein the atomic concentration of Nb is between 2.5 and 5 atomic percent, and the critical rod diameter of the alloy is at least 2 mm.

7. The alloy according to claim 1, wherein X is Cr.

8. The alloy according to claim 7, wherein a is between 1 and 7, and the critical rod diameter of the alloy is at least 1 mm.

9. The alloy according to claim 7, wherein b is between 5 and 15, and the critical rod diameter of the alloy is at least 1 mm.

10. The alloy according to claim 7, wherein c is between 15 and 21, and the critical rod diameter of the alloy is at least 1 mm.

11. The alloy according to claim 7, wherein d is between 0.25 and 3, and the critical rod diameter of the alloy is at least 1 mm.

12. The alloy according to claim 1, wherein up to 50 atomic percent of Ni is substituted with Co.

13. The alloy according to claim 1, wherein up to 30 atomic percent of Ni is substituted by Fe.

14. The alloy according to claim 1, wherein up to 10 atomic percent of Ni is substituted by Cu.

15. The alloy according to claim 1, wherein the alloy further comprises Ge, V, Sn, W, Ru, Re, Pd, Pt, or a combination thereof at combined atomic concentration of up to 2 percent

16. A metallic glass comprising an alloy where a composition of the alloy is represented by the following formula (subscripts denote atomic percentages):

Ni_{(100-a-b-c-d)}Mn_aX_bP_cSi_d

where;

a is between 0.25 and 12,

b is up to 20,

c is between 14 and 22,

d is between 0.25 and 5,

and where X is selected from Cr, Mo, Nb, Ta, and combinations thereof.

17. A method of producing the metallic glass comprising:

melting an alloy into a molten state;

where the alloy has a composition represented by the following formula (subscripts denote atomic percentages);

Ni_{(100-a-b-c-d)}Mn_aX_bP_cSi_d

where;

a is between 0.25 and 12,

b is up to 20,

c is between 14 and 22,

d is between 0.25 and 5,

where X is selected from Cr, Mo, Nb, Ta, and combinations thereof; and

quenching the melt at a cooling rate sufficiently rapid to prevent crystallization of the alloy.

18. The method of claim 17, further comprising fluxing the melt with a reducing agent prior to quenching.

19. The method of claim 17, wherein the temperature of the melt prior to quenching is at least 1100°

C.

20. The method of claim 17, wherein the temperature of the melt prior to quenching is at least 100°

C. above the liquidus temperature of the alloy.