Fluxing methods for nickel based chromium and phosphorus bearing alloys to improve glass forming ability
First Claim
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1. A method of fluxing a high purity Ni-based glass-forming alloy bearing Cr and P, wherein the Cr atomic concentration is greater than 7 percent and the P atomic concentration is greater than 12 percent, comprising:
- heating the alloy with a fluxing agent comprising boron and oxygen to a fluxing temperature that is above the liquidus temperature of the alloy and above the softening or melting temperature of the fluxing agent to form an alloy melt and a fluxing agent melt;
allowing the alloy melt to interact with the fluxing agent melt at the fluxing temperature to form a fluxed alloy;
cooling the fluxed alloy to a temperature below the glass transition temperature of the alloy;
wherein the critical rod diameter of the fluxed alloy is increased by at least 50% as compared to the critical rod diameter of the alloy comprising the same composition in its unfluxed high-purity state.
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Abstract
The disclosure is directed to Ni-based glass-forming alloys bearing Cr and P, wherein the Cr atomic concentration is greater than 7 percent and the P atomic concentration is greater than 12 percent, and methods of fluxing such alloys such that their glass-forming ability is enhanced with respect to the glass-forming ability associated with their unfluxed state.
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17 Claims
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1. A method of fluxing a high purity Ni-based glass-forming alloy bearing Cr and P, wherein the Cr atomic concentration is greater than 7 percent and the P atomic concentration is greater than 12 percent, comprising:
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heating the alloy with a fluxing agent comprising boron and oxygen to a fluxing temperature that is above the liquidus temperature of the alloy and above the softening or melting temperature of the fluxing agent to form an alloy melt and a fluxing agent melt; allowing the alloy melt to interact with the fluxing agent melt at the fluxing temperature to form a fluxed alloy; cooling the fluxed alloy to a temperature below the glass transition temperature of the alloy;
wherein the critical rod diameter of the fluxed alloy is increased by at least 50% as compared to the critical rod diameter of the alloy comprising the same composition in its unfluxed high-purity state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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