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.

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.

The present disclosure belongs to the field of preparation of high-performance alloy materials, and specifically relates to a plastic CoCrNi-based medium-entropy alloy with 2.0 GPa-level ultra-high yield strength and a preparation method thereof. The alloy is prepared by melting and casting, homogenization treatment, solution heat treatment, cold deformation and aging heat treatment. After cold deformation and aging heat treatment, the prepared alloy has a dual heterogeneous microstructure due to the discontinuous precipitation of the strengthening phase and the incomplete recrystallization composition. The CoCrNi-based medium-entropy alloy of the present disclosure has ultra-high yield strength (2.0 GPa) and sufficient safety in use (uniform elongation of more than 8%), which can be processed into various forms of products, and has a wide range of applications in the production of fasteners used in the fields of aerospace, navigation, oil and gas, food processing, springs, non-magnetic components, and instrument parts.

The present disclosure belongs to the field of preparation of high-performance alloy materials, and specifically relates to a plastic CoCrNi-based medium-entropy alloy with 2.0 GPa-level ultra-high yield strength and a preparation method thereof. The alloy is prepared by melting and casting, homogenization treatment, solution heat treatment, cold deformation and aging heat treatment. After cold deformation and aging heat treatment, the prepared alloy has a dual heterogeneous microstructure due to the discontinuous precipitation of the strengthening phase and the incomplete recrystallization composition. The CoCrNi-based medium-entropy alloy of the present disclosure has ultra-high yield strength (2.0 GPa) and sufficient safety in use (uniform elongation of more than 8%), which can be processed into various forms of products, and has a wide range of applications in the production of fasteners used in the fields of aerospace, navigation, oil and gas, food processing, springs, non-magnetic components, and instrument parts.

Provided are Ce/Co/Cu permanent magnet alloys containing certain refractory metals, such as Ta and/or Hf, and optionally Fe which represent economically more favorable alternative to Sm-based magnets with respect to both material and processing costs and which retain and/or improve magnetic characteristics useful for GAP MAGNET applications.

Provided are Ce/Co/Cu permanent magnet alloys containing certain refractory metals, such as Ta and/or Hf, and optionally Fe which represent economically more favorable alternative to Sm-based magnets with respect to both material and processing costs and which retain and/or improve magnetic characteristics useful for GAP MAGNET applications.

A method for producing a nonwoven for shielding electromagnetic radiation in a terahertz (THz) range includes: providing a first metal alloy adapted to shield electromagnetic radiation; providing a polymer material; providing a second metal alloy which differs from the first metal alloy; producing polymer fibers with filled fiber cores by evaporating the first metal alloy and mixing the first metal alloy molecules with the polymer material; coating at least a part of a surface of the polymer fibers with the second metal alloy; producing the nonwoven by randomly and irregularly arranging the coated polymer fibers with filled fiber cores in a three spatial dimensional directions, or producing the nonwoven by randomly and irregularly arranging the polymer fibers with filled fiber cores in the three spatial dimensional directions and coating at least a part of a surface of the nonwoven with the second metal alloy.

A method for producing a nonwoven for shielding electromagnetic radiation in a terahertz (THz) range includes: providing a first metal alloy adapted to shield electromagnetic radiation; providing a polymer material; providing a second metal alloy which differs from the first metal alloy; producing polymer fibers with filled fiber cores by evaporating the first metal alloy and mixing the first metal alloy molecules with the polymer material; coating at least a part of a surface of the polymer fibers with the second metal alloy; producing the nonwoven by randomly and irregularly arranging the coated polymer fibers with filled fiber cores in a three spatial dimensional directions, or producing the nonwoven by randomly and irregularly arranging the polymer fibers with filled fiber cores in the three spatial dimensional directions and coating at least a part of a surface of the nonwoven with the second metal alloy.

A high-performance permanent magnet is provided. A permanent magnet expressed by a composition formula: R.sub.pFe.sub.qM.sub.rCu.sub.tCo.sub.100-p-q-r-t-. The magnet comprises a metal structure including a cell phase having a Th.sub.2Zn.sub.17 crystal phase, and a Cu-rich phase provided to divide the cell phase and having a Cu concentration higher than that of the Th.sub.2Zn.sub.17 crystal phase. An Fe concentration of the Th.sub.2Zn.sub.17 crystal phase is not less than 30 atomic % nor more than 45 atomic %. An average length of the Cu-rich phase is not less than 30 nm nor more than 250 nm.

A high-performance permanent magnet is provided. A permanent magnet expressed by a composition formula: R.sub.pFe.sub.qM.sub.rCu.sub.tCo.sub.100-p-q-r-t-. The magnet comprises a metal structure including a cell phase having a Th.sub.2Zn.sub.17 crystal phase, and a Cu-rich phase provided to divide the cell phase and having a Cu concentration higher than that of the Th.sub.2Zn.sub.17 crystal phase. An Fe concentration of the Th.sub.2Zn.sub.17 crystal phase is not less than 30 atomic % nor more than 45 atomic %. An average length of the Cu-rich phase is not less than 30 nm nor more than 250 nm.