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Studies of the Rare - Earth Magnets
Jae Gui Koh,F. Pourarian,S. Simizu,S. G. Sankar 한국자기학회 1995 韓國磁氣學會誌 Vol.5 No.5
Specimens of Nd-Fe-B magnets with various compositions have been prepared and their physical properties investigated. The basic composition of Nd-Fe-B system is Nd_(15-x)Dy_xFe_(78.5)B_(6.5) with x varying between 0 and 2. Addition of Dy improves the coercivty significantly. The bulk density of the finished magnets is -7.5 g/cc. A remanence of 1.25 kG, and energy product of 42.1 MGOe have been observed with magnets containing x=1. Thermomagnetic measurements of alloys showed that the starting alloys exhibited a Curie temperature. of -330 C.