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US 9,085,814 B2Granted
Bulk nickel-based chromium and phosphorous bearing metallic glasses
AssigneeCalifornia Institute of Technology
InventorsJong Hyun Na, Marios D. Demetriou, William L. Johnson, Glenn Garrett
Life of this patent
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Abstract
Ni-based Cr- and P-bearing alloys that can from centimeter-thick amorphous articles are provided. Within the family of alloys, millimeter-thick bulk-glassy articles can undergo macroscopic plastic bending under load without fracturing catastrophically.
Claims44
A metallic glass alloy comprising:
- Ni(68.6−w−x−y−z)Cr8.7+wNb3+xP16.5+yB3.2+z,
- where w, x, y, and z are positive or negative atomic percentages that represent a deviation from the base composition having absolute values that satisfy:
- 0.21|w|+0.84|x|+0.96|y|+1.18|z|<1.89, and
- wherein the alloy has a critical rod diameter of at least 3 mm.
1 more element
A metallic glass alloy comprising:
- Ni(100−a−b−c−d)CraNbbPcBd
- where a, b, c, and d represent atomic percentages, and where:
- a is greater than 2.5 and less than 15,
- b is greater than 1.5 and less than 4.5,
- c is greater than 14.5 and less than 18.5, and
- d is greater than 1.5 and less than 4.5;
- and
- wherein the alloy has a critical rod diameter of at least 4 mm.
5 more elements
A metallic glass alloy comprising:
- Ni(100−a−b−c−d−e)CraNbbPcBdSie
- where a, b, c, d, and e are atomic percentages, and wherein:
- a is between 4 and 14,
- b is between 1.8 and 4.3,
- c is between 13.5 and 17.5,
- d is between 2.3 and 3.9, and
- e is up to 2;
- and
- wherein the alloy has a critical rod diameter of at least 3 mm.
6 more elements
A metallic glass alloy selected from the group consisting of:
- Ni69Cr8.5Nb3P17B2.5, Ni69Cr8.5Nb3P16.75B2.75, Ni69Cr8.5Nb3P16.5B3, Ni69Cr8.5Nb3P16B3.5, Ni69Cr8.5Nb3P15.75B3.75, Ni69Cr9Nb2.5P16.5B3, Ni69Cr8.75Nb2.75P16.5B3, Ni69Cr8.25Nb3.25P16.5B3, Ni69Cr8Nb3.5P16.5B3, Ni69Cr7.5Nb4P16.5B3, Ni72.5Cr5Nb3P16.5B3, Ni71.5Cr6Nb3P16.5B3, Ni70.5Cr7Nb3P16.5B3, Ni69.5Cr8Nb3P16.5B3, Ni68.5Cr9Nb3P16.5B3, Ni68Cr9.5Nb3P16.5B3, Ni67.5Cr10Nb3P16.5B3, Ni66.5Cr11Nb3P16.5B3, Ni65.5Cr12Nb3P16.5B3, Ni68.5Cr9Nb3P16B3Si0.5, Ni68.5Cr9Nb3P15.5B3Si1, Ni69Cr8.5Nb3P16B3Si0.5, Ni69Cr8.5Nb3P15.5B3Si1, Ni69.03Cr8.75Nb3.02P16.08B3.12, Ni68.17Cr8.65Nb2.98P16.92B3.28, Ni67.75Cr8.59Nb2.96P17.34B3.36, Ni69Cr8.5Nb2.5Ta0.5P15.5B3Si1, and Ni69.5Cr8.5Nb2.5Ta0.5P15.5B3Si1;
- wherein the alloy has a critical rod diameter of at least 3 mm.
A metallic glass alloy comprising:
- Ni68.6Cr8.7Nb3P16.5B3.2;
- wherein the alloy has a critical rod diameter of at least 3 mm.
A metallic glass alloy comprising:
- Ni68.6Cr8.7Nb3P16Si0.5B3.2;
- wherein the alloy has a critical rod diameter of at least 3 mm.
Dependencies are inferred from the claim text.