X-ray pole figure analysis of sintered PrFeB magnets

Determination of the crystallographic texture of sintered PrFeB magnets based on X-ray diffraction patterns

“…Sintered Pr 16 Fe 76 B 8 magnets were prepared using the powder metallurgy route together with the hydrogen decrepitation (HD) process [5]. The degree of alignment (0.51p/cos YSp0.97 [5]) was varied by changing the milling time.…”

“…The degree of alignment (0.51p/cos YSp0.97 [5]) was varied by changing the milling time. The isotropic magnet was obtained without applying the orienting magnetic field.…”

“…The isotropic magnet was obtained without applying the orienting magnetic field. The crystallographic alignment was initially determined by XRPF, using the (0 0 4) reflection [5,6] considered a standard reference for a comparison with XRDP. XRD patterns were obtained with Cu Ka radiation on an orthogonal magnet surface in the direction of the orienting field.…”

“…Ferrante et al [3] evaluated the magnetic alignment of hot-rolled (Nd,Pr)FeB magnets, also using this technique. More recently, it has been shown that the alignment index /cos YS, determined by the (0 0 4) X-ray pole figures (XRPF) analysis, is ideal to represent the degree of alignment of PrFeB magnets [4][5][6]. This index is convenient for use in mathematical equations for quantitative calculations of remanence values [5].…”

“…More recently, it has been shown that the alignment index /cos YS, determined by the (0 0 4) X-ray pole figures (XRPF) analysis, is ideal to represent the degree of alignment of PrFeB magnets [4][5][6]. This index is convenient for use in mathematical equations for quantitative calculations of remanence values [5]. In the present study, a method for obtaining /cos YS is proposed, based on data from the relative diffracted intensities of the F phase planes on the X-ray diffraction pattern (XRDP) of anisotropic and isotropic magnets.…”