Title :
Magnetic properties of new Nd-Fe-B nanocrystalline with α-Fe as main phase
Author :
Cho, Y.S. ; Kim, Y.B. ; Kim, C.S. ; Kim, T.K.
Author_Institution :
Korea Res. Inst. of Stand. & Sci., Taejon, South Korea
fDate :
5/1/1996 12:00:00 AM
Abstract :
The α-Fe based Nd-Fe-B magnet with low Nd content has been investigated to develop a new type of rare earth magnet. The amorphous Nd4Fe85.5B10.5 alloy prepared by a rapid quenching technique was crystallized to form only two phases: α-Fe as the main phase, and Nd2Fe14B as the secondary phase, The coercivity and remanence of the studied alloy were 95.5 kA/m and 1.2 T, respectively. The additions of Mo and Cu to Nd4Fe85.5B10.5 alloy reduced the mean grain size and increased the coercivity up to 207 kA/m. Furthermore, the substitution of 8 at% Co for Fe in Nd4Fe82B10 Mo3Cu1 improved the coercivity, remanence, and Curie point. The coercivity, remanence, and energy product of the Nd 4Fe74Co8B10Mo3Cu 1 alloy were 219 kA/m, 1.4 T, and 103.5 kJ/m3, respectively
Keywords :
Curie temperature; alloying additions; boron alloys; coercive force; demagnetisation; ferromagnetic materials; iron alloys; nanostructured materials; neodymium alloys; permanent magnets; rapid solidification; remanence; α-Fe phase; Cu addition; Curie point; Mo addition; Nd-Fe-B nanocrystalline magnet; Nd2Fe14B secondary phase; Nd4Fe74Co8B10Mo3 Cu1; Nd4Fe82B10Mo3Cu1 ; Nd4Fe85.5B10.5; coercivity; demagnetization curves; energy product; low Nd content; magnetic properties; mean grain size; rapid quenching technique; rare earth magnet; remanence; Amorphous magnetic materials; Amorphous materials; Coercive force; Copper alloys; Crystallization; Grain size; Iron alloys; Magnetic properties; Neodymium; Remanence;
Journal_Title :
Magnetics, IEEE Transactions on
