초록 ▼

Method of making an active magnetic refrigerant represented by Gd5(SixGe1-x)4alloy for 0≤x≤1.0 comprising placing amounts of the commercially pure Gd, Si, and Ge charge components in a crucible, heating the charge contents under subambient pressure to a melting temperature of the alloy for a time su

Method of making an active magnetic refrigerant represented by Gd5(SixGe1-x)4alloy for 0≤x≤1.0 comprising placing amounts of the commercially pure Gd, Si, and Ge charge components in a crucible, heating the charge contents under subambient pressure to a melting temperature of the alloy for a time sufficient to homogenize the alloy and oxidize carbon with oxygen present in the Gd charge component to reduce carbon, rapidly solidifying the alloy in the crucible, and heat treating the solidified alloy at a temperature below the melting temperature for a time effective to homogenize a microstructure of the solidified material, and then cooling sufficiently fast to prevent the eutectoid decomposition and improve magnetocaloric and/or the magnetostrictive and/or the magnetoresistive properties thereof.

대표청구항 ▼

Method of making an active magnetic refrigerant represented by Gd5(SixGe1-x)4alloy for 0≤x≤1.0 comprising placing amounts of the commercially pure Gd, Si, and Ge charge components in a crucible, heating the charge contents under subambient pressure to a melting temperature of the alloy for a time su

Method of making an active magnetic refrigerant represented by Gd5(SixGe1-x)4alloy for 0≤x≤1.0 comprising placing amounts of the commercially pure Gd, Si, and Ge charge components in a crucible, heating the charge contents under subambient pressure to a melting temperature of the alloy for a time sufficient to homogenize the alloy and oxidize carbon with oxygen present in the Gd charge component to reduce carbon, rapidly solidifying the alloy in the crucible, and heat treating the solidified alloy at a temperature below the melting temperature for a time effective to homogenize a microstructure of the solidified material, and then cooling sufficiently fast to prevent the eutectoid decomposition and improve magnetocaloric and/or the magnetostrictive and/or the magnetoresistive properties thereof. it onto which said coater rod is mounted and a tongue plate positioned at a distance from said base unit and flexibly connected thereto, said limiting surface being a part of said tongue plate; and an adjusting mechanism positioned adjacent to said coater bed and configured to alter the relative position of said limiting surface with respect to the web and to thereby alter a geometry of said accumulator chamber. 6. The coating device of claim 5, wherein said adjusting mechanism is supported on one side by said tongue plate at a side thereof opposite to said limiting surface and on another side by said base unit. 7. The coating device of claim 5, wherein said adjusting mechanism is configured to pivot said coater bed about an axis that is substantially parallel to a direction transverse to the feed direction. 8. The coating device of claim 5, wherein said tongue is supported by a support element of said coating device. 9. A coating device for directly applying a coating medium onto a fiber material web, said coating device comprising: a coater including a coater bed and a coater rod, said coater rod being rotatably mounted to said coater bed and configured for being positioned adjacent the web, said coater rod configured to define with the web a metering slot therebetween, said coater bed further comprising a limiting surface at an inlet thereof, said limiting surface being configured such that said limiting surface and the web define an accumulator chamber therebetween, said accumulator chamber opening in a direction opposite to a feed direction of the web and gradually decreasing in volume in the feed direction, said accumulator chamber being configured to promote accumulation of the coating medium in a region ahead of said metering slot relative to the feed direction, said coater bed being connected to a support element of said coating device via a flexible web; and an adjusting mechanism positioned adjacent to said coater bed and configured to alter the relative position of said limiting surface with respect to the web and to thereby alter a geometry of said accumulator chamber. 10. The coating device of claim 9, wherein said adjusting mechanism is supported by said coater bed on one side and by said support element on another side. 11. A coating device for directly applying a coating medium onto a fiber material web, said coating device comprising: a coater including a coater bed and a coater rod, said coater rod being rotatably mounted to said coater bed and configured for being positioned adjacent the web, said coater rod configured to define with the web a metering slot therebetween, said coater bed further comprising a limiting surface at an inlet thereof, said limiting surface being configured such that said limiting surface and the web define an accumulator chamber therebetween, said accumulator chamber opening in a direction opposite to a feed direction of the web and gradually decreasing in volume in the feed direction, said accumulator chamber being configured to promote accumulation of the coating medium in a region ahead of said metering slot relative to the feed direction, said limiting surface being comprised of a section having a shape of a partial outer surface of a cylinder; and an adjusting mechanism positioned adjacent to said coater bed and configured to alter the relative position of said limiting surface with respect to the web and to thereby alter a geometry of said accumulator chamber. 12. The coating device of claim 11, wherein said cylinder has a radius in the range of approximately 10 mm to 600 mm. 13. The coating device of claim 12, wherein said radius is approximately 50 mm. 14. A coating device for directly applying a coating medium onto a fiber material web, said coating device comprising: a coater including a coater bed and a coater rod, said coater rod being rotatably mounted to said coater bed and configured for being positioned adjacent the web, said coater rod configured