Title :
The phase diagrams of the pseudobinary Nd-(Fe14B) and the Fe-Nd-B ternary system
Author :
Tsa, D.S. ; Chi, T.S. ; Hsu, S.E. ; Hung, M.P.
Author_Institution :
National Cheng Kung Univ., Tainan
fDate :
9/1/1987 12:00:00 AM
Abstract :
A pseudobinary phase diagram of the Nd- (Fe14,B) system and liquidus isotherms in the Nd2Fe14B(T1) primary field of the Fe-Nd-B ternary system were determined by DTA, XRD, metallography and EDX techniques. The peritectic region for the appearence of T1phase is in the range of 3 % to 40 % Nd for the pseudobinary system, and hence part of the liquidus projection in the Fe-Nd-B ternary system is modified. It was found that there exists a homogeneity range for Nd in T1phase above 1000°C. It was determined to be 0.6, 1.0 and 1.5 at% Nd at 1000°C, 1090°C and 1145°C, respectively. A composition triangle of Fe-T1-T2(Nd1.1Fe4B4) instead of Fe-T1-Fe2B at 1090°C was identified.
Keywords :
Permanent magnet materials; Boron alloys; Copper alloys; Heating; Iron; Neodymium; Optical microscopy; Petroleum; Scanning electron microscopy; Temperature; X-ray scattering;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1987.1065517
