Boronizing of iron aluminide Fe72Al28

Hard boride coating on iron aluminide (FeAl)

“…Meantime, aluminum diffusion continues to increase after the interface. It has been reported that during boriding the majority of the aluminum atoms diffuse away from the boride zone to the matrix [13,15]. The same result was found in the current study.…”

“…However, no detectable phase is observed. In literature for boriding of iron, it is claimed that possible phases that can form in the transition zone would be FeSi 0.4 B 0.6 or Fe 5 SiB 2 (ironsilicoborides) because silicon and aluminum are not soluble in the boride layer and these elements are pushed from the surface by boron and are displaced ahead of the boride layer into the substrate (transition zone), forming ironsilicoborides underneath the possible iron borides [13,15,16]. However, in the current study boriding of FeAl is studied and the mentioned phases are not found.…”

“…As mentioned above, many studies have been achieved on many metals. However, the literature lacks boriding of iron aluminide, especially of FeAl even if there is only one study related to boronizing of Fe 3 Al [13].…”

The Effects of Structure Orientation on the Growth of Fe<SUB>2</SUB>B Boride by Multi-Phase-Field Simulation

“…Experimentally, it was observed that, due to the tendency of Fe 2 B crystals to grow along a direction of minimum resistance perpendicular to the external surface, 8) boride structures prefer to have morphology in the form of a columnar shape with 'toothing' characteristics on the tips. [7][8][9][10] As this type of structure has two-fold symmetry, the present simulation work also uses two-fold symmetry for the calculation of eq. (4), in order to obtain the appropriate approach for simulating this type of shape structure.…”

“…In the case of boride growth, it is considered that the morphology of boride structure significantly influences the adhesion bonding between boride layer and the substrate. [7][8][9][10] The interaction between the substrate and boride during the growth process is also considered to determine the kind of morphology of boride structure. It was reported that Fe 2 B boride layers produced by the conventional boronizing process to have a strong (0 0 1) growth texture 11) and grow perpendicular to the surface substrate.…”