Back to results
US 10,213,822 B2Granted
Feedstock barrels coated with insulating films for rapid discharge forming of metallic glasses
AssigneesGlassimetal Technology, Inc., Apple Inc.
InventorsDavid S. Lee, Joseph P. Schramm, Marios D. Demetriou, William L. Johnson
Life of this patent
Estimating the term…
Abstract
The present disclosure is directed to feedstock barrels comprising thermally and electrically insulating films configured to be adjacent to a feedstock sample when it is loaded in the barrel for the process of shaping metallic glasses by rapid capacitor discharge forming (RCDF) techniques.
Claims20
A rapid capacitor discharge forming (RCDF) apparatus for shaping metallic glasses, the apparatus comprising:
- a feedstock barrel that comprises a feedstock barrel substrate and an insulating film disposed on the interior of the feedstock barrel substrate, wherein the feedstock barrel is configured to contain a metallic glass feedstock sample on the interior of the insulating film, wherein the feedstock barrel substrate comprises a metal;
- a source of electrical energy configured to heat the metallic glass feedstock sample, said source electrically connected to at least one of a pair electrodes disposed at opposite ends of the feedstock barrel, said electrodes configured to discharge electrical energy sufficient to heat the metallic glass feedstock sample uniformly when the metallic glass feedstock sample is loaded into the feedstock barrel;
- and
- a shaping tool disposed in forming relation to the metallic glass feedstock sample, the shaping tool configured to apply a deformation force sufficient to shape the metallic glass feedstock sample when heated to an article.
1 more element
A method of heating and shaping a metallic glass feedstock sample using an RCDF cycle comprising:
- discharging electrical energy from a source of electrical energy across the metallic glass feedstock sample disposed in a feedstock barrel that comprises a feedstock barrel substrate and an insulating film, wherein the feedstock barrel substrate comprises a metal, wherein the insulating film is disposed on an interior surface of the feedstock barrel substrate, and the metallic glass feedstock sample is disposed on the interior of the insulating film of the feedstock barrel, to heat the metallic glass feedstock sample to a processing temperature between the Tg of the metallic glass and Tm of the metallic glass forming alloy, wherein the source of electrical enemy is electrically connected to at least one pair of electrodes, and wherein the at least one pair of electrodes are disposed at opposite ends of the feedstock barrel and connected to the metallic glass feedstock sample;
- applying a deformational force to shape the heated metallic glass feedstock sample into an article;
- and
- cooling the article to a temperature below the Tg of the metallic glass.
1 more element
Dependencies are inferred from the claim text.