Process and apparatus for producing metallic glass
US6427753B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 10, 1999 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Feb 10, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C45/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process and an apparatus for producing metallic glass which are capable of producing a bulk amorphous alloy of desired shape, in particular, a bulk amorphous alloy of desired final shape are provided. In the present invention, the molten metal at a temperature above the melting point is selectively cooled at a rate higher than the critical cooling rate, and the product comprises single amorphous phase which is free from the crystalline phase formed by the development of crystal nuclei through nonuniform nucleation. The present invention is capable of producing the bulk amorphous alloy which is free from casting defects such as cold shuts and which has excellent strength properties in a simple process at a high reproducibility. Accordingly, a bulk metallic glass of desired shape is produced by filling a metal material in a hearth; melting the metal material by using a high-energy heat source which is capable of melting the metal material; pressing the molten metal at a temperature above the melting point of the metal material to deform the molten metal into the desired shape by at least one of compressive stress and shear stress at a temperature above the melting point, while avoi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.