Rapid consolidation of FeAl–Fe3AlCx ultrafine composites by mechanically activated field-assisted technique

Effect of Processing Route on the Microstructure and Properties of an Fe-al Alloy with Additions of Precious Metal

“…This microstructure conforms well with the microstructure found by Archana et al [5] who purposefully included Fe 3 AlC and found that it improved the mechanical properties of the alloy. XRD analysis confirmed that the phases had not changed significantly from the phases in the mechanically alloyed and annealed powder, confirming that sintering had not altered the phase composition of the material.…”

“…The densities and hardnesses of the samples are shown in Table 6. The hardnesses of the samples agreed with Archana et al [5] in that non-equilibirum processing techniques tended to increase the hardness of the material, up to 1200°C, which indicates the upper effective limit of the sintering temperature. The density of the samples shows that all the samples were within the acceptable range of the density of the as-cast samples, so it should be possible to sinter further samples at 1000°C for 2.5 minutes.…”

“…However, this carbide has been demonstrated [5] to improve the properties of the FeAl alloy and so a small amount was considered beneficial. Sintering of the alloys managed to produce a fully dense material with a significantly smaller grain size than the ascast alloy, which is due to the fast heating and cooling rates with SPS.…”

“…Due to this, there are many potential applications for FeAl alloys. Some of the applications that have already been investigated are fuel injector nozzles [4], automobile exhaust systems [5], coatings for solid oxide fuel cell interconnects [6], boiler linings for ultra-supercritical power generation [7][8][9], and they have also shown promise for applications to replace the more expensive cobalt matrix in WC and TiC cermets [10,11].…”