Phase Evolution and Magnetic Studies of La and Refractory Metals Co-substituted α-Fe/R_2Fe_(14)B-type Nanocomposites

作     者：W. C. Changt, S.H. Wang, S.J. Chang and M. Y. Tsai (Department of Physics, Chung Cheng University, Ming-Hsiung, Chia-Yi, 621, Taiwan-China Q.Chen) (Rhodia Inc., Rare Earths and Gallium, CN 7500, Cranbury, New Jersey 08512, U.S.A.) 

作者机构：Department of Physics Chung Cheng University Ming-Hsiung Chia-Yi 621 Taiwan Rhodia Inc. Rare Earths and Gallium CN 7500 Cranbury NJ 08512 United States 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2000年第16卷第2期

页      面：102-106页

核心收录：

学科分类：07[理学] 0806[工学-冶金工程] 0817[工学-化学工程与技术] 070205[理学-凝聚态物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0802[工学-机械工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：National Science Council  Taiwan! under grant !No. NSC-87-2112-M194-005 

主　　题：Fe/R2Fe B-type Nanocomposites Phase Evolution and Magnetic Studies of La and Refractory Metals Co-substituted type La 

摘      要：Phase evolution and magnetic properties of (Nd_o.95La_0.05)9.5-11Febal.M_2B10.5. where M=Cr, Ti, Nb, V, Mo, Zr, Hf, Ta, Mn or W, melt spun ribbons have been investigated. Almost all the alloy ribbons. except for(Nd_0.95La_0.05)_9.5Fe_78M_2B_10.5(M=Mo and Mn),consist merely two magnetic phases, namely α-Fe and R_2Fe_14B, which display a better combination of _iH_c and magnetic energy product. Remanence (Br) and coercivity (i_H_c) values in the range of 8.0 to 9.1 kG and 9.5 to 18.9 kOe. respectively, can be achieved. Among compositions studied, the Ti and W-substitutions were found to be most effective in increasing the Br and i_H_c, respectively. For a fixed refractory metal substitution, namely, M=C_r, Ti or Nb, an increase in the total rare earth concentration resulted in nanocomposites of small grain sizes and a high volume fraction of the R_2Fe_14B phase, leading to an increase in the magnetic properties.