Fig. 2

(a–g). XRD analysis of (a) non-aged (b) aged at 250 °C-Furnace cooled (c) aged at 450 °C- Furnace cooled (d) aged at 250 °C-Water cooled (e) aged at 450 °C-Water cooled (f) aged at 250 °C- Atmospheric cooled (g) aged at 450 °C- Atmospheric cooled.