Title :
Phases of NdFe10.7-xCoxTi1.3 alloys and magnetic properties of their nitrides
Author :
Kim, Y.B. ; Kim, H.T. ; Lee, K.W. ; Kim, C.S. ; Kim, T.K.
Author_Institution :
Magnetics Lab., Korea Res. Inst. of Stand. & Sci., Taejon, South Korea
fDate :
9/1/1992 12:00:00 AM
Abstract :
It has been found that the arc-melted NdFe10.7-xCoxTi1.3 (x=0/2/4/6) alloys have nearly single phase of ThMn12-type structure except the small amount of (Fe, Co)2Ti (or Fe2Ti) and α-Fe phases. The ThMn12-type phase forms as square prisms and (Fe, Co)2Ti (or Fe2Ti) exists between the grain boundaries as particles. Nitrification of this alloy system considerably increased the anisotropy field and Curie temperature. The dependence on cobalt content of the magnetic properties before and after the nitrification treatments shows almost the same trend; the Co-substitution increases the Curie temperature but decreases the anisotropy field. In the nitride system studied, NdFe10.7Ti 1.3Ny has the highest anisotropy field of about 6370 kA/m (80 kOe)
Keywords :
Curie temperature; X-ray diffraction examination of materials; cobalt alloys; ferromagnetic properties of substances; grain boundaries; iron alloys; lattice constants; magnetic anisotropy; magnetisation; neodymium alloys; nitridation; permanent magnets; scanning electron microscope examination of materials; titanium alloys; α-Fe phases; Curie temperature; NdFe10.7-xCoxTi1.3 alloy; SEM; ThMn12-type structure; X-ray diffraction; anisotropy field; arc melted alloys; grain boundaries; lattice constants; magnetic properties; magnetisation; microstructure; nitrification treatments; permanent magnet material; Anisotropic magnetoresistance; Cobalt alloys; Iron; Magnetic anisotropy; Magnetic properties; Microstructure; Perpendicular magnetic anisotropy; Temperature; Titanium alloys; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
