Nano-scale phase separation in amorphous Fe–B alloys: Atomic and cluster ordering

Direct imaging of structural heterogeneity of the melt-spun Fe85.2Si2B8P4Cu0.8 alloy

“…However, it should be emphasized that even under such condition cluster regions with four-fold or six-fold atomic arrangements are locally observed as indicated by double-arrowheads, implying existence of stable crystalline bcc-Fe clusters 12 with a considerable volume fraction in the alloy. In the structure simulation of Fe-B amorphous alloys with near eutectic compositions by Mykol et al, 13 regions of bcc-Fe clusters are formed together with icosahedral-Fe and polytetrahedral Fe-B cluster regions, in agreement with a Voronoi polyhedral analysis of the eutectic Fe-B alloy from an electron diffraction study.…”

Effect of vanadium on atomic ordering characteristics and anti-phase boundary energies of B2–FeCo alloys

“…Therefore, electronic theory of alloys in different approximations should be employed for that purposes. The computation of the partial ordering energies in multi-component alloy systems can be described by the electronic theory of alloys in the pseudopotential approximation and has been discussed including several calculations and applications elsewhere [29][30][31][32][33]. Hence, the partial ordering energies between different pairs of atoms, u aa 0 (R), in substitutional ternary A-B-C alloys can be calculated by using following equations;…”

“…(2) and (3) in which the contribution of the d-resonance effect is relatively small [37]. Therefore, the Animalu's model pseudopotential has been successfully applied previously for evaluation of various characteristics of the Ni-and Fe-based binary and multi-component transition metal systems [21,22,[29][30][31][32][33]. Thus, partial ordering energies of atomic pairs in FeCo-V alloys are calculated up to first five CSs based on Eqs.…”

Influence of Microstructure on Microhardness of Fe81Si4B13C2 Amorphous Alloy after Thermal Treatment

“…[5,6] The theoretical investigation of nanoscale phase separation in small Fe 80 B 20 and Fe 83 B 17 clusters predicts formation of Fe-pure regions, Fe-rich regions (which contain around 9 pct B), and B-rich regions. [7] While amorphous alloys can be multifunctional and used as corrosion- [8] and wear-resistant coatings, the ability to use them to manufacture bulk components has stimulated new interest in their mechanical properties. [9,10] The effect of boron, carbon, and silicon on the hardness of iron alloys has been well documented.…”