Patent ID: 8916087
Filing Date: 2014-12-23
Classification: B22D,B29C,B29K,C22C

Abstract:
1. A method of shaping a bulk metallic glass comprising: providing a preformed parison of bulk metallic glass, said parison having inner and outer faces; providing a mold defining an internal cavity; placing said parison into shaping alignment with the mold such that the outer face of the parison is exposed to the internal cavity of the mold and the internal cavity of the mold is sealed off from the external environment; heating said parison to a temperature within the supercooled liquid region of the bulk metallic glass material; applying a pressure differential between the inner and outer faces of the parison such that the parison expands to form a final article that conforms to the contour of the internal cavity of the mold, wherein the preformed parison is configured to ensure that substantially all of the local lateral strain experienced by any portion of the outer surface of the parison during expansion occurs prior to this portion of the outer face of the parison coming into contact with the mold; and cooling the final article to below the glass transition temperature of the bulk metallic glass material at rate such that final article remains substantially amorphous.