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Details of ball-milled SPS sample processing conditions, grain size and hardness.
| sintering temperature (°C) | dwell time (min) | pressure (MPa) | melting | average grain size (µm) | average hardness (Vickers) |
|---|---|---|---|---|---|
| 1050 | 10 | 75 | no | 1.3 | 742 |
| 1050 | 10 | 100 | no | 1.2 | 754 |
| 1075 | 10 | 100 | no | 1.4 | 797 |
| 1100 | 10 | 75 | slight | 1.0 | 707 |
| 1150 | 3 | 75 | yes | 0.6 | 684 |
| 1175 | 3 | 75 | yes | 0.6 | 683 |
