BULK NICKEL-PHOSPHORUS-BORON GLASSES BEARING MANGANESE

• US 20140238551A1
• Filed: 02/26/2014
• Published: 08/28/2014
• Est. Priority Date: 02/26/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Glassimetal Technology Inc.
• Inventors: Na, Jong Hyun, Floyd, Michael, Demetriou, Marios D., Johnson, William L., Garrett, Glenn, Launey, Maximilien, Duggins, Danielle
• Granted Patent: US 9,816,166 B2
• Time in Patent Office: Days
• US Class Current: 148/403
• CPC Class Codes: C22C 1/11 Making amorphous alloys
• CPC Class Codes: C22C 19/03 based on nickel
• CPC Class Codes: C22C 19/05 with chromium
• CPC Class Codes: C22C 45/04 with nickel or cobalt as the major constituent

Abstract

The disclosure is directed to Ni—P—B alloys bearing Mn and optionally Cr and Mo that are capable of forming a metallic glass, and more particularly metallic glass rods with diameters at least 1 mm and as large as 5 mm or larger. The disclosure is further directed to Ni—Mn—Cr—Mo—P—B alloys capable of demonstrating a good combination of glass forming ability, strength, toughness, bending ductility, and corrosion resistance.

Claims

1. An alloy represented by the following formula (subscripts denote atomic percentages):

Ni_(100-a-b-c)Mn_aX_bP_c-dB_d  

 

(1)

where;

a is between 0.5 and 10,

b is up to 15,

c is between 14 and 24,

d is between 1 and 8, and

wherein X can be Cr and/or Mo and the alloy is capable of forming a metallic glass.

2. The alloy according to claim 1, wherein b is at least 1, and wherein the alloy also comprises at least one of Nb or Ta at a combined atomic concentration of less than 1 percent.

3. The alloy according to claim 1, wherein b is 0, and wherein the alloy also comprises at least one of Nb or Ta at a combined atomic concentration of less than 0.5 percent.

4. The alloy according to claim 1, wherein up to 1 atomic percent of P is substituted by Si.

5. The alloy according to claim 1, wherein Ni is substituted in accordance with at least one of the following up to 50 atomic percent of Ni is substituted by Co, up to 30 atomic percent of Ni is substituted by Fe, or up to 10 atomic percent of Ni is substituted by Cu.

6. The alloy according to claim 1, wherein the critical rod diameter is at least 1 mm.

7. A metallic glass formed of the alloy according to claim 1.

8. The alloy according to claim 1, wherein b=0, a is at least 2 and up to 9.5, c is between 16.5 and 21.5, and d is between 1 and 6.5.

9. An alloy according to claim 8, wherein a is between 3 and 8 and the critical rod diameter is at least 2 mm.

10. An alloy according to claim 8, wherein a is between 6 and 7.5 and the critical rod diameter is at least 3 mm.

11. An alloy according to claim 8, wherein c is between 17.25 and 20.75 and the critical rod diameter is at least 2 mm.

12. An alloy according to claim 8, wherein c is between 18.5 and 20.25 and the critical rod diameter is at least 3 mm.

13. An alloy according to claim 8, wherein d is between 1.75 and 5.75 and the critical rod diameter is at least 2 mm.

14. An alloy according to claim 8, wherein d is between 2.5 and 3.75 and the critical rod diameter is at least 3 mm.

15. An alloy represented by the formula (subscripts denote atomic percentages):

Ni_{(100-a-b1-b2-c-d)}Mn_aCr_b1Mo_b2P_cB_d  

 

(2)

where;

a is between 1 and 5,

b1 is between 4 and 11,

b2 is up to 3,

c is between 15 and 19, and

d is between 1 and 5.

16. An alloy according to claim 15, wherein a is between 2.25 and 3.75, b1 is between 5 and 10, b2 is up to 2, c is between 15.75 to 18, d is between 1.5 and 4.5, and the critical rod diameter is at least 2 mm.

17. An alloy according to claim 15, wherein a is between 2.5 and 3.5, b1 is between 6 and 9, b2 is up to 1.5, c is between 16 to 17.75, d is between 2.25 and 3.75, and the critical rod diameter is at least 3 mm.

18. An alloy according to claim 15, wherein a is between 2.75 and 3.25, b1 is between 6 and 8, b2 is between 0.75 and 1.25, c is between 16 to 17.25, d is between 2.5 and 3.5, and the critical rod diameter is at least 4 mm.

19. An alloy according to claim 15, wherein the sum of c and d is between 18.5 and 20.5, and the critical rod diameter is at least 2 mm.

20. A metallic glass formed of the alloy according to claim 15.