Bulk nickel-iron-based, nickel-cobalt-based and nickel-copper based glasses bearing chromium, niobium, phosphorus and boron

• US 9,957,596 B2
• Filed: 12/23/2014
• Issued: 05/01/2018
• Est. Priority Date: 12/23/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc., Glassimetal Technology Inc.
• Inventors: Na, Jong Hyun, Crewdson, Chase, Abarca, Oscar, Duggins, Danielle, Launey, Maximilien, Demetriou, Marios D., Johnson, William L.
• Primary Examiner(s): WYSZOMIERSKI, GEORGE P
• Application Number:
  US14/581,950
• Publication Number:
  US 20150176111A1
• Time in Patent Office: 1,225 Days
• Field of Search: None
• CPC Class Codes: C22C 1/11 Making amorphous alloys
• CPC Class Codes: C22C 45/04 with nickel or cobalt as the major constituent

Abstract

Ni—Fe, Ni—Co, and Ni—Cu-based bulk metallic glass forming alloys are provided. The alloys have critical rod diameters of at least 1 mm and in some instances at least 11 mm. The alloys have composition according to Ni_{(100-a-b-c-d-e)}X_aCr_bNb_cP_dB_e, wherein X is at least one of Fe, Co, and Cu, the atomic percent X (Fe and/or Co and/or Cu) ranges from 0.5 to 30, the atomic percent of Cr ranges from 2 to 15, the atomic percent of Nb ranges from 1 to 5, the atomic percent of P ranges from 14 to 19, the atomic percent of B ranges from 1 to 5, and the balance is Ni.

Claims

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

Ni_{(100-a-b-c-d-e)}Fe_aCr_bNb_cP_dB_e, wherein

a is greater than 2 and up to 15, b ranges from 2 to 15, c ranges from 1 to 5, d ranges from 14 to 19, and e ranges from 1 to 5;

wherein the alloy has a critical rod diameter of at least 1 mm, wherein Δ

T_x of the metallic glass formed from the alloy is at least 3°

C. higher compared to Δ

T_x of the metallic glass formed from a substantially identical alloy free of Fe and containing a corresponding increased amount of Ni.

2. The alloy of claim 1, wherein a is greater than 2 and up to 12.5, b ranges from 5 to 12, c ranges from 2 to 4, d ranges from 16.25 to 17, e ranges from 2.75 to 3.5, and wherein the alloy has a critical rod diameter of at least 2 mm.

3. The alloy of claim 1, wherein a is greater than 2 and up to 12.5, b ranges from 3 to 13, c is determined by x−

y·

b, where x ranges from 3.8 to 4.2 and y ranges from 0.11 to 0.14, d ranges from 16.25 to 17, e ranges from 2.75 to 3.5, and wherein the alloy has a critical rod diameter of at least 3 mm.

4. The alloy of claim 1, wherein a is greater than 2 and up to 12.5, b ranges from 3 to 13, c is determined by x−

y·

b, where x ranges from 3.8 to 4.2 and y ranges from 0.11 to 0.14, d ranges from 15.5 to 17.5, e ranges from 2 to 4, and wherein the metallic glass has Δ

T_x of at least 41°

C.

5. The alloy of claim 1, wherein a is greater than 2 and up to 10, b ranges from 4 to 7, c ranges from 2.5 to 3.5, d ranges from 16 to 17, e ranges from 2.5 to 3.5, and wherein the metallic glass has Δ

T_x of at least 50°

C.

6. A metallic glass comprising an alloy according to claim 1.

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

Ni_{(100-a-b-c-d-e)}Co_aCr_bNb_cP_dB_e, wherein

a is greater than 2 and up to 25, b ranges from 2 to 15, c ranges from 1 to 5, d ranges from 14 to 19, e ranges from 1 to 5;

wherein the alloy has a critical rod diameter of at least 3 mm, wherein Δ

T_x of the metallic glass formed from the alloy is at least 3°

C. higher compared to Δ

T_x of the metallic glass formed from a substantially identical alloy free of Co and containing a corresponding increased amount of Ni.

8. The alloy of claim 7, wherein a is greater than 2 and up to 20, b ranges from 5 to 12, c ranges from 2 to 4, d ranges from 16.25 to 17, e ranges from 2.75 to 3.5, wherein the alloy has a critical rod diameter of at least 6 mm.

9. The alloy of claim 7, wherein a is greater than 2 and up to 20, b ranges from 3 to 13, c is determined by x−

y·

b, where x ranges from 3.8 to 4.2 and y ranges from 0.11 to 0.14, d ranges from 16.25 to 17, e ranges from 2.75 to 3.5, wherein the alloy has a critical rod diameter of at least 6 mm.

10. The alloy of claim 7, wherein a is greater than 2 and up to 15, b ranges from 7.5 to 11, c ranges from 2.75 to 3.25, d ranges from 16.25 to 16.75, e ranges from 2.75 to 3.25, and wherein the alloy has a critical rod diameter of at least 8 mm.

11. The alloy of claim 7, wherein a is greater than 2 and up to 15, b ranges from 4 to 7.5, c ranges from 3.25 to 3.75, d ranges from 16.25 to 16.75, e ranges from 2.75 to 3.5, wherein the alloy has a critical rod diameter of at least 8 mm.

12. The alloy of claim 7, wherein a is greater than 2 and up to 5, b ranges from 8 to 9.5, c ranges from 2.75 to 3.25, d ranges from 16.25 to 16.75, e ranges from 2.75 to 3.25, and wherein the alloy has a critical rod diameter of at least 9 mm, and wherein the metallic glass has notch toughness of at least 70 MPa m^1/2.

13. The alloy of claim 7, wherein a is greater than 2 and up to 5, b ranges from 5 to 6, c ranges from 3.25 to 3.75, d ranges from 16.25 to 16.75, e ranges from 2.75 to 3.25, and wherein the alloy has a critical rod diameter of at least 9 mm, and wherein the metallic glass has notch toughness of at least 80 MPa m^1/2.

14. The alloy of claim 7, wherein a is greater than 2 and up to 25, b ranges from 8 to 9.5, c ranges from 2.75 to 3.25, d ranges from 16.25 to 16.75, e ranges from 2.75 to 3.25, and wherein the metallic glass has Δ

T_x of at least 46°

C.

15. The alloy of claim 7, wherein a is greater than 2 and up to 25, b ranges from 5 to 6, c ranges from 3.25 to 3.75, d ranges from 16.25 to 16.75, e ranges from 2.75 to 3.25, and wherein the metallic glass has Δ

T_x of at least 41°

C.

16. A metallic glass comprising an alloy according to claim 7.