Formation and magnetic properties of Fe-B-Si metallic glasses

Surface and electrical studies of Fe–Si–B powders for soft magnetic applications

“…6 As to the problem of the double charge shift observed in two of our samples, an attempt to an explanation may be presented along the lines of differences in the surface roughness of powder grains of different samples visible in Fig. 3.…”

A thermodynamic study of liquid Fe-Si-B alloys; an influence of ternary associates on a liquid → glass transition

“…Decristofaro's data [57] were chosen due to their widest correspondence with the compositions investigated here and their good agreement with the results of other studies. [57,[69][70][71][72] As can be seen in Figure 9, the concentration intervals of the amorphization stemming from the thermodynamic consideration developed herein and from the experimental data [57] on the crystallization temperatures are in perfect accordance. In Figure 10, the same functions, ⌬ f S and C P E , calculated without allowance for the ternary Fe 6 BSi associates are plotted.…”

“…Hence, based on the preceding reasoning, these values can be replaced by the, more convenient for analysis, ⌬ f S and C P E functions. These functions calculated at the temperature of 1423 K belonging to the lowest part of the Fe-Si-B liquid stability region [55] are depicted in Figure 9 as isoheat capacity and isoentropic lines in the composition triangle together with the data on temperatures of the amorphous Fe-Si-B alloys crystallization, T cr , reported by Decristofaro et al [57] The T cr values can be considered as immediate index of the amorphous state stability and as the best measure of the glassforming tendency. Decristofaro's data [57] were chosen due to their widest correspondence with the compositions investigated here and their good agreement with the results of other studies.…”

“…These functions calculated at the temperature of 1423 K belonging to the lowest part of the Fe-Si-B liquid stability region [55] are depicted in Figure 9 as isoheat capacity and isoentropic lines in the composition triangle together with the data on temperatures of the amorphous Fe-Si-B alloys crystallization, T cr , reported by Decristofaro et al [57] The T cr values can be considered as immediate index of the amorphous state stability and as the best measure of the glassforming tendency. Decristofaro's data [57] were chosen due to their widest correspondence with the compositions investigated here and their good agreement with the results of other studies. [57,[69][70][71][72] As can be seen in Figure 9, the concentration intervals of the amorphization stemming from the thermodynamic consideration developed herein and from the experimental data [57] on the crystallization temperatures are in perfect accordance.…”

“…Allowance for only the first one or two terms of this expansion, as it was done in the works discussed, should restrict a precision of the functions evaluated. [57] A polynomial representation of the concentration and temperature dependences of the excess thermodynamic functions of the base binaries and the ternary Fe-Si-B melts was used in the modeling study. [55] Owing to lack of experimental data, Desre et al [55] measured the coordinates of eight couples of points belonging to the liquidus and solidus surfaces with the aid of differential scanning calorimetry, whereby they estimated the value of the ternary interaction parameter to be equal to Ϫ95,000 J mol Ϫ1 .…”