| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1603849 | International Journal of Refractory Metals and Hard Materials | 2012 | 5 Pages |
Stabilization of the metastable FCC phase has been achieved after 10 h milled Co powder sintering at 1400 °C. Phase identification of the Co powders was performed by the X-ray diffraction analysis, while the microstructural analyses were performed by scanning electron microscopy. Phase transformation on the metal was traced by the differential scanning calorimetry.
► Presence of ultrafine (amorphous-like) particles in the unmilled Co powder led to HCP/FCC cp-existence upon 1400C sintering. ► 10 h MM changed particle shape of Co powder from irregular-spherical to thin flakes. ► MM promotes thermal stabilization of metastable FCC Co due to produced thin flakes. ► Metastable RHL phase was detected on milled Co sintered at 1200 °C. ► High average hardness of 300 HV in sintered milled compacts was obtained compared to 50 HV of unmilled.
