Compositions for forming Au-based bulk-solidifying amorphous alloys are provided. The Au-based bulk-solidifying amorphous alloys of the current invention are based on ternary Au—Cu—Si alloys, and the extension of this ternary system to higher order alloys by the addition of one or more alloying elem
Compositions for forming Au-based bulk-solidifying amorphous alloys are provided. The Au-based bulk-solidifying amorphous alloys of the current invention are based on ternary Au—Cu—Si alloys, and the extension of this ternary system to higher order alloys by the addition of one or more alloying elements. Additional substitute elements are also provided, which allow for the tailoring of the physical properties of the Au-base bulk-solidifying amorphous alloys of the current invention.
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1. A bulk-solidifying amorphous alloy consisting essentially of: (Au1-x(Ag1-y(Pd,Pt)y)x)a(Cu1-z(Ni,Co,Fe,Cr,Mn)z)b((Si1-vPv)1-w(Ge,Al,Y,Be)w)c wherein a is in the range of from about 31 to about 64, b is in the range of from about 22 to about 36, and c is in the range of from about 12 to about 26, a
1. A bulk-solidifying amorphous alloy consisting essentially of: (Au1-x(Ag1-y(Pd,Pt)y)x)a(Cu1-z(Ni,Co,Fe,Cr,Mn)z)b((Si1-vPv)1-w(Ge,Al,Y,Be)w)c wherein a is in the range of from about 31 to about 64, b is in the range of from about 22 to about 36, and c is in the range of from about 12 to about 26, andwhere: x is between 0.05 and 0.15,y is between 0 and 0.8,z is between 0 and 0.1,v is between 0 and 0.5, andw is between 0 and 1; andwherein Si is greater than zero atomic percent to 17 atomic percent, Y is 5 atomic percent or less, andwherein the bulk-solidifying amorphous alloy has at least 50% amorphous content by volume and has a minimum thickness of about 1 mm. 2. The bulk-solidifying amorphous alloy as in claim 1, wherein the alloy is a pentiary alloy. 3. The bulk-solidifying amorphous alloy of claim 1, wherein the bulk-solidifying amorphous alloy composition is at least ninety-five percent amorphous. 4. The bulk-solidifying amorphous alloy of claim 1, wherein the bulk-solidifying amorphous alloy is about one hundred percent amorphous. 5. The bulk-solidifying amorphous alloy of claim 1, wherein Si is from 12 to 17 atomic percent. 6. An object comprising the bulk-solidifying amorphous alloy as described in claim 1. 7. A method for making a bulk-solidifying amorphous alloy having at least 50% amorphous phase comprising the steps of: forming a molten alloy having the formula as described in claim 1; andcooling the entire alloy from above its melting temperature to a temperature below its glass transition temperature at a sufficient rate to prevent formation of more than 50% crystalline phase. 8. A bulk-solidifying amorphous alloy consisting essentially of: (Au1-x(Ag1-yPdy)x)aCub((Si1-zBez)1-vPv)c,where a, b, c are in atomic percentages and x, y, z, and v are in fractions of a whole, andwhere a is in the range of from about 25 to about 75, b is in the range of from about 10 to about 50, and c is in the range of from about 10 to about 35, andwhere: x is between 0 and 0.5,y is between 0 and 1,z is between 0 and 0.5, andv is between 0 and 0.5; andwherein Si is from 2.5 atomic percent to 17 atomic percent andwherein the bulk-solidifying amorphous alloy has at least 50% amorphous content by volume and has a minimum thickness of about 1 mm. 9. The bulk-solidifying amorphous alloy as in claim 8, wherein the alloy is a quaternary alloy with an alloy composition chosen from one of the following combinations of components (Au, Cu, Ag, Si), (Au, Cu, P, Si), and (Au, Cu, Pd, Si). 10. The bulk-solidifying amorphous alloy as in claim 8, wherein a is in the range of from about 29 to about 70, b is in the range of from about 15 to about 45, and c is in the range of from about 12 to about 30, and where: x is between 0 and 0.3,y is between 0 and 0.9,z is between 0 and 0.3, andv is between 0 and 0.5. 11. The bulk-solidifying amorphous alloy as in claim 8, wherein a is in the range of from about 31 to about 64, b is in the range of from about 22 to about 36, and c is in the range of from about 12 to about 26, and where: x is between 0.05 and 0.15,y is between 0 and 0.8,z is between 0 and 0.1, andv is between 0 and 0.5. 12. The bulk-solidifying amorphous alloy as in claim 8, wherein the alloy is a pentiary alloy. 13. The bulk-solidifying amorphous alloy of claim 8, wherein the bulk-solidifying amorphous alloy composition is at least ninety-five percent amorphous. 14. The bulk-solidifying amorphous alloy of claim 8, wherein the bulk-solidifying amorphous alloy is about one hundred percent amorphous. 15. An object comprising the bulk-solidifying amorphous alloy as described in claim 8. 16. A method for making a bulk-solidifying amorphous alloy having at least 50% amorphous phase comprising the steps of: forming a molten alloy having the formula as described in claim 8; andcooling the entire alloy from above its melting temperature to a temperature below its glass transition temperature at a sufficient rate to prevent formation of more than 50% crystalline phase. 17. The method as in claim 16 wherein the cooling rate is less than 1000° C./sec. 18. A bulk-solidifying amorphous alloy formed of an alloy consisting essentially of: (Au1-x(Ag1-yPdy)x)aCubSic,where a, b, c are in atomic percentages and x and y are in fractions of a whole, andwherein a is in the range of from about 25 to about 75, b is in the range of from about 10 to about 50, and c is in the range of from 12 to 17, and where x is in the range of from about 0.0 to about 0.5, and y is in the range of from about 0.0 to about 1.0; andwherein the bulk-solidifying amorphous alloy has at least 50% amorphous content by volume and has a minimum thickness of about 1 mm. 19. The bulk-solidifying amorphous alloy as in claim 18 wherein a is in the range of from about 29 to about 70, b is in the range of from about 15 to about 45, and c is in the range of from about 13 to 17, and where x is in the range from about 0.0 to about 0.5, and y is in the range of from about 0.0 to about 1.0. 20. The bulk-solidifying amorphous alloy as in claim 19 wherein, x is in the range of from about 0.0 to about 0.3, and y is in the range of from about 0.0 to about 0.9. 21. The bulk-solidifying amorphous alloy as in claim 18 wherein, a is in the range of from about 31 to about 64, b is in the range of from about 22 to about 36, and c is in the range of from about 14 to 17, and where x is in the range from about 0.0 to about 0.5, and y is in the range of from about 0.0 to about 1.0. 22. The bulk-solidifying amorphous alloy as in claim 21 wherein, x is in the range of from about 0.05 to about 0.15, and y is in the range of from about 0.0 to about 0.8. 23. A method for making a bulk-solidifying amorphous alloy having at least 50% amorphous phase comprising the steps of: forming a molten alloy having the formula as described in claim 22; andcooling the entire alloy from above its melting temperature to a temperature below its glass transition temperature at a sufficient rate to prevent formation of more than 50% crystalline phase. 24. The method as in claim 23 wherein the cooling rate is less than 100° C./sec. 25. The bulk-solidifying amorphous alloy as in claim 18 wherein, x is in the range of from about 0.0 to about 0.3, and y is in the range of from about 0.0 to about 0.9. 26. The bulk-solidifying amorphous alloy as in claim 18 wherein, x is in the range of from about 0.05 to about 0.15, and y is in the range of from about 0.0 to about 0.8. 27. The bulk-solidifying amorphous alloy of claim 18, wherein the bulk-solidifying amorphous alloy composition is at least ninety-five percent amorphous. 28. The bulk-solidifying amorphous alloy of claim 18, wherein the bulk-solidifying amorphous alloy is about one hundred percent amorphous. 29. An object comprising the bulk-solidifying amorphous alloy as described in claim 18. 30. A method for making a bulk-solidifying amorphous alloy having at least 50% amorphous phase comprising the steps of: forming a molten alloy having the formula as described in claim 18; andcooling the entire alloy from above its melting temperature to a temperature below its glass transition temperature at a sufficient rate to prevent formation of more than 50% crystalline phase. 31. The method as in claim 30 wherein the cooling rate is less than 1000° C./sec.
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