| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1689530 | Vacuum | 2016 | 5 Pages |
•FeAl(Cu) phase was stable during spraying due to congruent melting.•Cu decreased the lattice parameter of FeAl.•The lattice parameter of FeAl(Cu) decreased during spraying somewhat.•Cu increased the hardness of FeAl due to solid solution strengthening.•Cu decreased the exchange current density in acidic solution.
50Al-25Cu-25Fe (at.%) powders were milled for 0.5 h and subsequently annealed at 600, 750 and 900 °C for 0.5 h in a vacuum furnace. X-ray diffractometery (XRD) results revealed that FeAl(Cu) phase and unreacted Fe were seen after annealing at 600 and 750 °C while at 900 °C only FeAl(Cu) was formed. FeAl(Cu) powders were consolidated using air plasma spraying (APS) process. With increase of plasma power, the porosity content of the coating decreased from 33 to 8%. The FeAl(Cu) phase was stable during spraying while small amount of oxides were also formed. The coatings showed microhardness up to 487 HV and fracture toughness up to 4 MPa m0.5. The corrosion rate of the coatings in 0.5 M H2SO4 solution was lower than that of binary Fe-Al coatings reported in the literature.
