Table 1. Rietveld Refinement Results of the XRD-CT Mean Patterns Illustrating the Co Phase wt % and CS (Crystallite Size in nm) in the Samples Extracted after 150 and 300 hb.
| Mn
wt % |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| time (h | 150 | 300 |
|||||||
| phase | 5% | 0% | 1% | 2% | 3% | 5% | 10% | 10%a | |
| Co2C | wt % | 7.5 | 0.6 | 0.9 | 3.6 | 8.9 | 7.1 | ||
| CS | 7.5 | 10.6 | 9.3 | 11.7 | |||||
| FCC | wt % | 0.4 | 3.5 | 3.3 | 3.6 | 1.6 | 0.1 | 0.0 | 2.9 |
| CS | 3.54 | 10.5 | 8.1 | 7.7 | 5.2 | 11.2 | |||
| HCP | wt % | 0.2 | 4.9 | 4.8 | 3.8 | 3.1 | 0.2 | 0.7 | 5.3 |
| CS | 2.6 | 2.2 | 2.2 | 7.1 | 9.9 | 2.9 | |||
a
Reduction at 450 °C.
b
The Co2C wt % increases with Mn loading whilst the Co metal phases (FCC and HCP) decrease with increasing Mn wt % beyond 5%. The 10 wt % samples were reduced at 450 °C.