Method and System for Fabricating Bulk Metallic Glass Sheets

摘要

This invention describes a method and hardware of how to deform metallic glasses under low force and stabilized conditions to fabricate thin and large area metallic glass sheets. It is based on a combination of thermoplastic rolling and stretching and typically combined with a pre-heating method. The predominant mode of deformation is dependent on the BMG conditions such as thickness, viscosity, and crystallization time.

主权项

1. A method of fabricating a bulk metallic glass sheet, the method comprising the steps of:
a) preheating a bulk metallic glass feedstock to a temperature sufficient to soften the bulk metallic glass feedstock but that does not significantly contribute to a consumed crystallization time of the bulk metallic glass; and b) thermoplastically rolling the pre-heated bulk metallic glass feedstock between a set of heated rollers maintained at a processing temperature of the bulk metallic glass; and c) stretching the bulk metallic glass sheet after the bulk metallic glass sheet exits the set of heated rollers; wherein the bulk metallic glass feedstock is reduced in thickness to produce a bulk metallic glass sheet; and wherein processing conditions during steps a) to c) are such that a Reynolds number Re<10−3 of the bulk metallic glass is maintained.