Production of metallic glass by melt deposition
AssigneeGlassimetal Technology, Inc.
InventorsMarios D. Demetriou, Joseph P. Schramm, William L. Johnson, David S. Lee
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Abstract
Methods and apparatus for forming high aspect ratio metallic glass, including metallic glass sheet and tube, by a melt deposition process are provided. In some methods and apparatus a molten alloy is deposited inside a tubular channel formed by two concentrically arranged substrates, and shaped and quenched by conduction to the substrates in a manner that enables the molten alloy to vitrify prior to undergoing substantial shear flow. The deposition method allows the molten alloy to be deposited and formed while being quenched, without undergoing substantial shear flow.
Claims20
An apparatus for forming a metallic glass object, the apparatus comprising:
- a first substrate;
- and
- a second substrate separated from the first substrate by a gap of thickness t, the first substrate and the second substrate configured to move relative to each other at a velocity V;
- the first substrate and the second substrate and the gap configured to form a channel having a thickness t and width w defined by an overlapping cross section of the first substrate and the second substrate perpendicular to a direction of the velocity V;
- a melt reservoir configured to contain a molten alloy capable of forming the metallic glass object;
- a nozzle configured to be in fluid communication with the melt reservoir and configured to extract the molten alloy along the overlapping cross section of the first substrate and second substrate and deposit the molten alloy into the channel;
- and at least one of the first substrate and the second substrate is configured to cool the molten alloy rapidly.
An apparatus for forming a metallic glass tube, the apparatus comprising:
- an interior tubular substrate of circumference wi;
- and
- an exterior tubular substrate of circumference wo, where wo>wi;
- the interior tubular substrate and the exterior tubular substrate are arranged concentrically with the interior substrate inside the exterior substrate such that they are separated by gap t;
- and
- the interior tubular substrate and the exterior tubular substrate are configured to move relatively to each other at a velocity V;
- a melt reservoir configured to contain a molten alloy and disposed in fluid communication with the gap;
- the gap is a tubular channel for a molten alloy capable of forming metallic glass to be deposited after being extracted along either wo or wi and deposited between the interior tubular and exterior tubular substrates;
- and at least one of the interior and exterior substrates is configured to cool the molten alloy rapidly.
A method of forming a metallic glass object, the method comprising:
- heating an alloy capable of forming a metallic glass to form a molten alloy;
- the temperature of the first substrate and second substrate is below the nose temperature of the metallic glass,
- the first substrate and second substrate are configured to move relatively to each other at a velocity V;
- depositing the molten alloy at a deposition rate Q in a gap of thickness t separating a first substrate and a second substrate along an overlapping cross section between the first substrate and second substrate having width w that is perpendicular to a direction of V;
- and
- cooling the extracted molten alloy with at least one of the first substrate and the second substrate.
A method for forming metallic glass tube, the method comprising:
- heating an alloy capable of forming a metallic glass to form a molten alloy;
- depositing the molten alloy at a deposition rate Q in a tubular gap of thickness t separating two substantially concentrically arranged tubular substrates of circumferences wi and wo, where wo>wi, along either wo or wi,
- the temperature of the substrates is below the nose temperature of the metallic glass;
- the substrates are configured to move relatively to each other at a velocity V;
- cooling the extracted molten alloy with at least one of the interior and exterior substrates.
Dependencies are inferred from the claim text.