Table 1.
The sample code, rotation speed of the copper wheel, impurity phase, lattice parameter a, grain size GS determined from XPD data and TEM images, and relative density ρ rel of the meltspun CoSb3 samples after the SPS process.
| Code | Rotation speed /rpm | Impurities | a /Å | GS (XPD) /nm | GS (TEM) /nm | ρ rel /% |
|---|---|---|---|---|---|---|
| 600RPM | 600 | 8 % Sb | 9.0358(3) | 343.5 | 50–1000 | 95.6 |
| 1200RPM | 1200 | 5 % CoSb2 | 9.0355(2) | 336.3 | 250–800 | 97.3 |
| 1800RPM | 1800 | 5 % CoSb2 | 9.0360(2) | – | 150–400 | 88.6 |
| 2400RPM | 2400 | 8 % CoSb2 | 9.0370(3) | 157.1 | < 50 | 87.7 |
| 3000RPM | 3000 | 20 % CoSb2 | 9.0350(6) | – | – | 98.3 |