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- W1534553631 endingPage "640" @default.
- W1534553631 startingPage "636" @default.
- W1534553631 abstract "Bulk amorphous Nd70Fe20Al10, Nd65Fe25Al10 and Nd60Fe30Al10 alloys with hard magnetic properties were produced in a cylindrical form with a diameter of 12 mm and a length of 70 mm by sucking their molten alloys into a copper mold. The sucking force was generated from the rapid movement (5.0 m/s) of piston with a diameter of 12 mm which was set at the center of the copper mold. The casting velocity was evaluated to be as high as 3.5 kg/s. Neither cavity nor hole is seen on the outer surface of the bulk amorphous alloy and the crystallization temperature (Tx) and melting temperature (Tm) are 761 and 866 K, respectively, for the bulk amorphous Nd70Fe20Al10 alloy. Consequently, the temperature interval of supercooled liquid defined by the difference between Tm and Tx, ΔTm(=Tm−Tx) is as small as 105 K and the reduced crystallization temperature (Tx⁄Tm) is as high as 0.88. The small ΔTm and high Tx⁄Tm values are presumed to be the origin for the achievement of the large glass-forming ability for the Nd–Fe–Al alloys. The bulk amorphous Nd70Fe20Al10, Nd65Fe25Al10 and Nd60Fe30Al10 cylinders exhibit hard magnetic properties of 0.076 to 0.086 T for remanence, 291 to 321 kA/m for intrinsic coercive field and 13 to 16 kJ/m3 for maximum energy product at 298 K which are nearly the same as those for the corresponding bulk amorphous cylinders with diameters of 1 to 5 mm prepared by conventional casting. The hard magnetic properties for the Nd–Fe–Al amorphous alloys with large glass-forming ability are promising for future progress as a new type of hard magnetic materials." @default.
- W1534553631 created "2016-06-24" @default.
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- W1534553631 date "1996-01-01" @default.
- W1534553631 modified "2023-10-17" @default.
- W1534553631 title "Hard Magnetic Bulk Amorphous Nd–Fe–Al Alloys of 12 mm in Diameter Made by Suction Casting" @default.
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- W1534553631 doi "https://doi.org/10.2320/matertrans1989.37.636" @default.
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