High-strength amorphous alloy and process for preparing the same
US6231697A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 14, 1998 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Aug 14, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/18
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high-strength amorphous alloy represented by the general formula: X.sub.a M.sub.b Al.sub.c T.sub.d (wherein X is at least one element selected between Zr and Hf; M is at least one element selected from the group consisting of Ni, Cu, Fe, Co and Mn; T is at least one element having a positive enthalpy of mixing with at least one of the above-mentioned X, M and Al; and a, b, c and d are atomic percentages, provided that 25.ltoreq.a.ltoreq.85, 5.ltoreq.b .ltoreq.70, 0<c.ltoreq.35 and 0<d.ltoreq.15) and having a structure comprising at least having an amorphous phase. The amorphous alloy is produced by preparing an amorphous alloy having the above-mentioned composition and containing at least an amorphous phase, and heat-treating the alloy in the temperature range from the first exothermic reaction-starting temperature (Tx.sub.1 : crystallization temperature) thereof to the second exothermic reaction-starting temperature (Tx.sub.2) thereof to decompose the amorphous phase into a mixed phase structure consisting of an amorphous phase and a microcrystalline phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.