Alloy and method of producing the same
US6918973B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 5, 2002 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Mar 4, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C45/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In accordance with a preferred embodiment of the invention, an alloy or other composite material is provided formed of a bulk metallic glass matrix with a microstructure of crystalline metal particles. The alloy preferably has a composition of (XaNibCuc)100−d−cYdAlc, wherein the sum of a, b and c equals 100, wherein 40≦a≦80, 0≦b≦35, 0≦c≦40, 4≦d≦30, and 0≦e≦20, and wherein preferably X is composed of an early transition metal and preferably Y is composed of a refractory body-centered cubic early transition metal. A preferred embodiment of the invention also provides a method of producing an alloy composed of two or more phases at ambient temperature. The method includes the steps of providing a metastable crystalline phase composed of at least two elements, heating the metastable crystalline phase together with at least one additional element to form a liquid, casting the liquid, and cooling the liquid to form the alloy. In accordance with a preferred embodiment of the invention, the composition and cooling rate of the liquid can be controlled to determine the volume fraction of the crystalline phase and determine the size of the crystalline particles, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.