Method of casting articles of a bulk-solidifying amorphous alloy
US5797443A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 30, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Sep 30, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D46/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A casting charge of a bulk-solidifying amorphous alloy is cast into a mold from a temperature greater than its crystallized melting temperature, and permitted to solidify to form an article. The oxygen content of the casting charge is limited to an operable level, as excessively high oxygen contents produce premature crystallization during the casting operation. During melting, the casting charge is preferably heated to a temperature above a threshold temperature to eliminate heterogeneous crystallization nucleation sites within the casting charge. The casting charge may be cast from above the threshold temperature, or it may be cooled to the casting temperature of more than the crystallized melting point but not more than the threshold temperature, optionally held at this temperature for a period of time, and thereafter cast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.