Title :
The effects of the α-Fe precipitation on the coercive force of the rapidly quenched Pr-Fe-B-Zr alloys
Author :
Jeung, W.Y. ; Kang, I.K. ; Choi, J.O. ; Lee, J.J.
Author_Institution :
Div. of Metals, Korea Inst. of Sci. & Technol., Seoul, South Korea
fDate :
9/1/1990 12:00:00 AM
Abstract :
It has been found that the magnetic properties of the optimally heat-treated overquenched ribbons are inferior to those of the ribbons optimally quenched directly from the molten alloy. An attempt is made to elucidate the difference in coercive force between the two states. X-ray diffraction and thermomagnetic analysis confirm that the α-Fe phase is precipitated during the underquenching and the annealing after overquenching. This indicates that the degradation of coercive force of the annealed overquenched ribbons originates from the α-Fe precipitates. The existence of α-Fe is less detrimental to the coercive force than expected, suggesting that the grain boundary suppresses the propagation of domain walls
Keywords :
X-ray diffraction examination of materials; annealing; boron alloys; coercive force; ferromagnetic properties of substances; grain boundaries; iron alloys; magnetic domain walls; praseodymium alloys; precipitation; quenching (thermal); zirconium alloys; α-Fe precipitation; Pr-Fe-B-Zr alloys; X-ray diffraction; annealing; coercive force; domain walls; grain boundary; magnetic properties; molten alloy; optimally heat-treated overquenched ribbons; rapidly quenched; thermomagnetic analysis; underquenching; Amorphous magnetic materials; Amorphous materials; Annealing; Coercive force; Crystallization; Magnetic domain walls; Magnetic properties; Magnetic separation; Temperature; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
