Phase equilibria and magnetic phases in the Fe-rich regions of the Ce-Fe-{Ni, Si, Al}-B quaternary systems

Intrinsic Magnetic Properties of Ce2Fe14B Modified by Al, Ni, or Si

“…Therefore, the improvement in M S in this study is presumably attributed to the contributions of the secondary phases. The intrinsic magnetic properties of the Ce 2 (Fe 14−x T x ) 14 B solid solutions reported here, where T = Al, Ni, or Si, are limited to the homogeneity ranges, which were determined by diffusion couple and other key alloys techniques described in [32]. Table 1 shows the magnetic properties of these solid solutions in relation to the undoped Ce 2 Fe 14 B.…”

“…Studies of Nd 2 (Fe 14−x T x )B, where T = Al, Ni, and Si have shown that Ni and Si increase the Curie temperature (T C ) and Al significantly increases coercivity [27][28][29][30][31]. Homogeneity ranges for Ce 2 (Fe 14−x Ni x )B, Ce 2 (Fe 14−x Si x )B, and Ce 2 (Fe 14−x Al x )B solid solutions have been found to be (0 ≤ x Ni ≤ 1.5), (0 ≤ x Si ≤ 2.33), and (0 ≤ x Al ≤ 2.5), respectively, at 900 • C, and the details of the phase equilibria in these systems are reported elsewhere [32]. The dopant concentrations used throughout this paper are the actual values substituting for Fe in the Ce 2 Fe 14 B phase as determined by scanning electron microscopy (SEM) combined with wavelength-dispersive X-ray spectroscopy (WDS).…”

“…The dopant concentrations used throughout this paper are the actual values substituting for Fe in the Ce 2 Fe 14 B phase as determined by scanning electron microscopy (SEM) combined with wavelength-dispersive X-ray spectroscopy (WDS). Ce 2 (Fe 14−x T x )B solid solutions, where T = Al, Ni, and Si, show visible magnetic domains using magnetic force microscopy (MFM) analysis, and more details can be found in [32]. The aim of this work is to quantify the changes in the intrinsic magnetic properties of Ce 2 Fe 14 B when Fe is replaced by various amounts of Al, Ni, and Si.…”

Microstructural Optimization of Fe‐Rich Intermetallic in Al–12 wt% Si–2 wt% Fe alloys by Adding Travelling Magnetic Fields

“…The changes of microstructure in Al–12Si alloys are mainly focused on the microstructural composition and the morphology of the Fe‐rich intermetallic. Putting aside the phases containing Cu, many literatures [ 33,34 ] have reported that both Al and Si have a strong affinity toward to Fe, so that the Fe is hard to eliminate from the Al–Si alloys. By combining Figure 2 and 3, when the content of Fe is low (<0.5 wt%), the Al–Si eutectic phases including the matrix α ‐Al phase, the (Al, Si) phase, and the primary Si particles [ 35 ] with the plate shape are formed preferentially.…”