Title :
Structural imperfections in Pr2Fe14B magnets with additions of Al, Cu and Zn
Author :
Zhang, Y.J. ; Withanawasam, L. ; Hadjipanayis, G.C.
Author_Institution :
Dept. of Phys. & Astron., Delaware Univ., Newark, DE, USA
fDate :
9/1/1992 12:00:00 AM
Abstract :
The coercivity of melt-spun Pr-Fe-B magnets has been found to increase with small additions of Al, Cu, and Zn. Systematic high-resolution electron microscope (HREM) observations were carried out to reveal the structural changes that might occur with these substitutions. Cu additions lead to planar imperfections which are found locally along (001) planes of the 2:14:1 main phase. Similar planar imperfections were also found in the sintered magnets with the same additions. This behavior might be attributed to the immiscibility of the added elements with Fe during alloying
Keywords :
alloying additions; boron alloys; coercive force; crystal defects; ferromagnetic properties of substances; iron alloys; permanent magnets; praseodymium alloys; transmission electron microscope examination of materials; HREM; Pr-Fe-B-Al; Pr-Fe-B-Cu; Pr-Fe-B-Zn; Pr2Fe14B magnets; added elements; coercivity; high resolution electron microscopy; immiscibility; melt spun magnets; planar imperfections; sintered magnets; structural changes; Coercive force; Electron microscopy; Grain boundaries; Iron; Magnetic force microscopy; Magnetic variables measurement; Magnets; SQUID magnetometers; Transmission electron microscopy; Zinc;
Journal_Title :
Magnetics, IEEE Transactions on
