Method for heat treating an object containing at least one rare-earth element with a high vapor pressure
AssigneeVacuumschmelze GmbH & Co. KG
InventorsKaan Üstüner, Matthias Katter, Christoph Brombacher, Daniela Benedikt
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Abstract
A method is provided for the heat treatment of an object comprising at least one rare-earth element with a high vapor pressure. One or more objects comprising at least one rare-earth element with a high vapor pressure are arranged in an interior of a package. An external source of the at least one rare-earth element is arranged so as to compensate for the evaporation of this same rare-earth element from the object and/or to increase the vapor pressure of the rare-earth element in the interior of the package, and the package is heat treated.
Claims16
A method for heat treating an object, the method comprising the following:
- providing a lower box comprising a base, walls that surround the base, and an open side,
- providing an upper box comprising a cover, walls that surround the cover and an open side,
- arranging one or more objects on the base of the lower box, the one or more objects including at least one of Sm, Dy, Er, Eu, and Yb, and the lower box and/or the upper box comprising iron foil and/or an iron plate,
- arranging an external source of the at least one of Sm, Dy, Er, Eu, and Yb within the lower box and/or the upper box, the external source being provided by an alloy of iron and the at least one of Sm, Dy, Er, Eu, and Yb,
- covering the one or more objects with the upper box such that the open side of the upper box faces the base of the lower box, the walls of the upper box are arranged on the base of the lower box and a gap is formed between the walls of the upper box and the walls of the lower box,
- introducing a powder material into the gap in order to form an assembly having an interior, the powder material providing a mechanical obstacle to gas exchange between the interior and an environment outside of the interior of the assembly, and
- heat treating the assembly.
Dependencies are inferred from the claim text.