Title :
Crystallization behavior of melt-spun NdxFe93-x Nb1B6 alloys
Author :
Withanawasam, L. ; Panagiotopoulos, I. ; Hadjipanayis, G.C.
Author_Institution :
Dept. of Phys. & Astron., Delaware Univ., Newark, DE, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
The crystallization behavior of NdxFe93-xNb 1B6 melt-spun ribbons was investigated using calorimetric techniques. The crystallization products were identified by X-ray diffraction and thermomagnetic measurements. Samples with x⩾10 crystallize directly from amorphous to a mixture of Nd2Fe14B and α-Fe phases. For 10<x<7, the final mixture of 2:14:1 and α-Fe phases is obtained through a two stage crystallization where the intermediate metastable Nd2 Fe23B3 and Nd3Fe62B 14 phases are produced at the initial crystallization. In samples with 7<x<4 the intermediate phase Is Nd3Fe62B14. No metastable phases were observed in samples containing less than 3 at% Nd although the calorimetric measurements indicated a two-step crystallization process
Keywords :
X-ray diffraction; amorphous magnetic materials; boron alloys; coercive force; crystal structure; crystallisation; ferromagnetic materials; iron alloys; magnetic hysteresis; melt spinning; neodymium alloys; niobium alloys; permanent magnets; thermomagnetic effects; NdxFe93-xNbB6; NdFe93NbB6; X-ray diffraction; calorimetric techniques; coercivity; hysteresis loops; intermediate metastable phases; melt-spun ribbons; thermomagnetic measurements; two-step crystallization; Annealing; Crystallization; Iron alloys; Metastasis; Neodymium; Niobium alloys; Phase measurement; Temperature; X-ray diffraction; X-ray scattering;
Journal_Title :
Magnetics, IEEE Transactions on
