Utilization of carbon dioxide and/or carbon monoxide gases in processing metallic glass compositions
View Patent ↗A method of forming an iron based glass forming alloy. The method may include providing a feedstock of an iron based glass forming alloy, melting the feedstock, casting the feedstock into an elongated body in an environment comprising 50% or more of a gas selected from carbon dioxide, carbon monoxide or mixtures thereof.
1. A method of forming an iron based glass forming alloy, comprising:
providing a feedstock of an iron based glass forming alloy, wherein said iron based glass forming alloy comprises 40.5 to 65.5 atomic percent iron, 13.0 to 17.5 atomic percent nickel, 2.0 to 21.5 atomic percent cobalt, 11.5 to 17.0 atomic percent boron, optionally 4.0 to 8.0 atomic percent carbon, optionally 0.3 to 4.5 atomic percent silicon, and optionally 2.0 to 20.5 atomic percent chromium;
melting said feedstock;
casting said feedstock into an elongated body in an environment comprising an inert gas and 50% or more of a gas selected from carbon dioxide, carbon monoxide or mixtures thereof, wherein said gasses are present at a pressure of 0.1 atm to 0.67 atm, and said iron based glass forming alloy after casting exhibits an ultimate tensile strength in the range of 1.55 GPa to 3.30 GPa and a Young's Modulus in the range of 103.7 GPa to 230.7 GPa.
2. The method of claim 1 , wherein a spinodal glass forming matrix is developed upon casting.
3. The method of claim 2 , wherein said iron based glass forming alloy after casting exhibits one or more glass to crystalline transformations in the range of 400° C. to 552° C.
4. The method of claim 1 , wherein said iron based glass forming alloy after casting exhibits an elongation in the range of 2.10% to 4.23% at a strain rate of 0.001 s −1 .
5. The method of claim 1 , wherein casting is selected from one or more of the following: melt spinning, jet casting, hyperquenching, planar flow casting and twin roll casting.
6. The method of claim 1 , wherein said feedstock is cast into a ribbon.
7. The method of claim 1 , wherein said feedstock is cast into a wire.
8. The method of claim 1 , wherein a mixture of carbon monoxide and carbon dioxide are present and carbon monoxide is present in the range of 1% to 99% of the total amount of the mixture and carbon dioxide is present in the range of 99% to 1% of the total amount of the mixture.
9. The method of claim 1 , wherein said elongated body has a thickness in the range of 0.1 mm to 2,000 mm.
10. The method of claim 1 , wherein said elongated body does not include nucleation sites reducing the glass volume to less than 15%.
11. A method of forming an iron based glass forming alloy, comprising:
providing a feedstock of an iron based glass forming alloy, wherein said iron based glass forming alloy comprises 40.5 to 65.5 atomic percent iron, 13.0 to 17.5 atomic percent nickel, 2.0 to 21.5 atomic percent cobalt, 11.5 to 17.0 atomic percent boron, 4.0 to 8.0 atomic percent carbon, optionally 0.3 to 4.5 atomic percent silicon, and optionally 2.0 to 20.5 atomic percent chromium;
melting said feedstock;
casting said feedstock into an elongated body in an environment comprising a mixture of carbon dioxide and carbon monoxide.
12. The method of claim 11 , wherein a spinodal glass forming matrix is developed upon casting.
13. The method of claim 11 , wherein said iron based glass forming alloy after casting exhibits one or more glass to crystalline transformations in the range of 400° C. to 552° C.
14. The method of claim 11 , wherein said iron based glass forming alloy after casting exhibits an elongation in the range of 2.10% to 4.23% at a strain rate of 0.001 s −1 .
15. The method of claim 11 , wherein said iron based glass forming alloy after casting exhibits an ultimate tensile strength in the range of 1.55 GPa to 3.30 GPa and a Young's Modulus in the range of 103.7 GPa to 230.7 GPa.
16. The method of claim 11 , wherein a mixture of carbon monoxide and carbon dioxide are present and said carbon monoxide is present at levels of greater than 75% by volume.
17. The method of claim 11 , wherein said gas is at a pressure of 0.1 atm. to 1 atm.
18. The method of claim 11 , wherein said elongated body does not include nucleation sites reducing the glass volume to less than 15%.
19. The method of claim 11 , wherein said environment further comprises an inert gas.