Bulk nickel—silicon—boron glasses bearing iron

• US 9,534,283 B2
• Filed: 01/07/2014
• Issued: 01/03/2017
• Est. Priority Date: 01/07/2013
• 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
• Primary Examiner(s): WYSZOMIERSKI, GEORGE P
• Application Number:
  US14/149,035
• Publication Number:
  US 20140190593A1
• Time in Patent Office: 1,092 Days
• Field of Search: None
• 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 33/003 making amorphous alloys
• 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 1/10 of nickel or cobalt or alloys based thereon

Abstract

Ni—Fe—Si—B and Ni—Fe—Si—B—P metallic glass forming alloys and metallic glasses are provided. Metallic glass rods with diameters of at least one, up to three millimeters, or more can be formed from the disclosed alloys. The disclosed metallic glasses demonstrate high yield strength combined with high corrosion resistance, while for a relatively high Fe contents the metallic glasses are ferromagnetic.

Claims

1. An alloy comprising Fe in atomic percent a between 5 and 50, Si in atomic percent b between 10 and 14, B in atomic percent c between 9 and 13, the balance is Ni, and wherein the alloy is capable of forming a metallic glass rod having a diameter of at least 1 mm.

2. The alloy of claim 1, wherein the Fe atomic percent a is between 15 and 50, and the diameter of the metallic glass rod that can be formed is at least 1 mm.

3. The alloy of claim 1, wherein the Fe atomic percent a is between 25 and 40, and the diameter of the metallic glass rod that can be formed is at least 2 mm.

4. The alloy of claim 1, wherein a combined atomic percent of Si and B is between 21 and 24.

5. The alloy of claim 1, wherein up to 3 atomic % of Ni or Fe is substituted by Cr.

6. The alloy of claim 1, wherein up to 1.5 atomic % of Fe or Ni is substituted by Co, Mn, W, Mo, Ru, Re, Cu, Pd, Pt, Nb, V, Ta, or a combination thereof.

7. A metallic glass comprising the alloy of claim 1.

8. An alloy comprising composition selected from a group consisting of Ni₅₂Fe₂₅Si₁₂B₁₁, Ni₄₇Fe₃₀Si₁₂B₁₁, Ni_44.5Fe_32.5Si₁₂B₁₁, Ni₄₂Fe₃₅Si₁₂B₁₁, Ni_39.5Fe_37.5Si₁₂B₁₁, Ni₃₇Fe₄₀Si₁₂B₁₁, Ni₅₃Fe₂₅Si₈B₁₀P₄, Ni₅₃Fe₂₅Si₈B₉P₅, Ni₅₃Fe₂₅Si₉B₉P₄, Ni₅₃Fe₂₅Si₇B₉P₆, Ni₅₃Fe₂₅Si₇B₁₀P₅, Ni_53.68Fe_25.32Si_7.64B_8.59P_4.77, Ni_52.32Fe_24.68Si_8.36B_9.41P_5.23, Ni₅₄Fe₂₄Si₈B₉P₅, and Ni₅₂Fe₂₆Si₈B₉P₅, wherein the alloy is capable of forming a metallic glass rod having a diameter of at least 1 mm.

9. An alloy comprising Fe in atomic percent a between 5 and 50, Si in atomic percent b between 7 and 10, B in atomic percent c between 7 and 10, and P in atomic percent d between 0.5 and 8, the balance is Ni, and wherein the alloy is capable of forming a metallic glass rod having a diameter of at least 1 mm.

10. The alloy of claim 9, wherein a is between 20 and 45, and the diameter of the metallic glass rod that can be formed when processed by water quenching a high temperature melt in a quartz tube having wall thickness of 0.5 mm is at least 2 mm.

11. The alloy of claim 9, wherein a combined atomic percent of Si B and P is between 21 and 23.

12. The alloy of claim 9, wherein up to 3 atomic % of Ni or Fe is substituted by Cr.

13. The alloy of claim 9, wherein up to 1.5 atomic % of Fe or Ni is substituted by Co, Mn, W, Mo, Ru, Re, Cu, Pd, Pt, Nb, V, Ta, or a combination thereof.

14. A metallic glass comprising the alloy of claim 9.

15. A method of producing the metallic glass of claim 14 comprising:

melting the alloy into a molten state; and

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

16. The method of claim 15, further comprising fluxing the melt with a reducing agent prior to quenching.

17. The method of claim 16, wherein the reducing agent is boron oxide.

18. The method of claim 15, the step of melting the alloy comprises melting the alloy in a crucible, the crucible made of fused silica, a ceramic, alumina, zirconia, or graphite, or in a water-cooled hearth made of copper or silver.

19. The method of claim 15, the step of quenching the melt comprises quenching a crucible containing the molten alloy in a bath of room temperature water, iced water, or oil.

20. The method of claim 15, the step of quenching the melt comprises injecting or pouring the molten alloy into a metal mold.