Hard magnetic properties of Sm3Fe26.7VxN4 and Sm3Fe26.7VxCy

Sm3Fe26.7V2.3N4 nitrides and Sm3Fe26.7V2.3Cy carbides have been synthesized by gas-solid phase reaction. Their hard magnetic properties have been inve stigated by means of additional ball-milling at room temperature. The satur ation magnetization of Sm3Fe26.7V2.3N4 almost decreases linearly with incre asing ball-milling time t, but that of Sm3Fe26.7V2.3Cy has no obvious chang e when the ball-milling time increases from t = 1 to 28 h. As a preliminary result, the maximum remanence B-r of 0.94 and 0.88 T, the coercivity mu(0i )H(C) of 0.75 and 0.25 T, and the maximum energy product (BH) of 108.5 and 39.1 kJ/m(3) for their resin-bonded permanent magnets are achieved, respect ively, by ball-milling at 293 K. (C) 1999 Published by Elsevier Science B.V . All rights reserved.