Title :
Effect of grain growth inhibitors on the hysteresis properties of Nd10Fe82C6B2 melt-spun alloys
Author :
Daniil, M. ; Zhang, Y. ; Okumura, H. ; Hadjipanayis, G.C. ; Sellmyer, D.J.
Author_Institution :
Dept. of Phys. & Astron., Delaware Univ., Newark, DE, USA
fDate :
9/1/2002 12:00:00 AM
Abstract :
An effort has been made to improve the coercivity of nanocomposite Nd10Fe82C6B2 alloys, using small amounts (up to 1 at%) of Cr, Ti, Nb, Zr, and Ga. X-ray studies revealed that the amount of α-Fe phase in both as-spun and annealed ribbons was significantly reduced for Nb and Zr substitutions, but increased for all the other substitutions. From the magnetic properties point of view, Zr (1 at%) was proven to be the most advantageous of all, since it increased the coercivity of annealed ribbons from 3.2 to 4.8 kOe and the maximum energy product from 5.8 to 13 MGOe. This improvement is associated with the much finer and more uniform microstructure as was revealed by transmission electron microscopy.
Keywords :
X-ray diffraction; alloying additions; annealing; boron alloys; coercive force; composite materials; ferromagnetic materials; grain growth; iron alloys; magnetic hysteresis; melt spinning; nanostructured materials; neodymium alloys; permanent magnets; transmission electron microscopy; α-Fe phase; Nb substitutions; Nd10Fe81.5Ti0.5C6B2; Nd10Fe81CrB2C6; Nd10Fe81GaB2C6; Nd10Fe81NbB2C6; Nd10Fe81ZrB2C6; Nd10Fe82C6B2; X-ray studies; Zr substitutions; annealed ribbons; as-spun ribbons; coercivity; grain growth inhibitors; hysteresis properties; magnetic properties; maximum energy product; microstructure; nanocomposite Nd10Fe82C6B2 melt-spun alloys; transmission electron microscopy; Annealing; Chromium alloys; Coercive force; Gallium alloys; Inhibitors; Iron; Magnetic hysteresis; Neodymium; Niobium alloys; Zirconium;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.803315
