Process for the preparation of pure alloys based on rare earths and transition metals by metallothermy
US4767455A · kind A · utility
14Cited by
9References
22Claims
0Family size
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Key dates
| Filing date | Nov 24, 1987 |
| Grant date | Aug 30, 1988 |
| Priority date | — |
| Expiry date | Nov 24, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C33/003
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An industrial process for the obtaining, preferably without casting, of its of high-purity master alloy based on at least one rare earth and at least one transition metal by metallothermic reduction of a compound of said rare earth by means of a reducing agent such as alkali or alkaline earth metals, characterized in that the transition metal is introduced into the starting reaction mixture, at least in part in the form of a compound which can be reduced by the reducing agent used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.