1 Introduction
2 Experiment
3 Results and Discussion
3.1 Open-Closed Pore Transformation
Temperature [K (°C)] | Liquid Fraction (Wt Pct) | Bulk Density (g cm−3) | Total Porosity (Vol Pct) | Open Porosity (Vol Pct) | Open-Pore Fraction (Pct) |
---|---|---|---|---|---|
As-nitrided | 0 | 1.42 ± 0.01 | 49.2 ± 0.5 | 37.7 ± 0.4 | 76.6 ± 1.5 |
893 (620) | 5.6 | 1.42 ± 0.01 | 50.9 ± 0.3 | 35.8 ± 0.9 | 70.4 ± 2.2 |
913 (640) | 26.7 | 1.56 ± 0.00 | 44.2 ± 0.0 | 28.1 ± 0.6 | 63.5 ± 1.5 |
923 (650) | 76.4 | 1.53 ± 0.04 | 45.4 ± 1.5 | 13.6 ± 3.0 | 30.0 ± 7.6 |
973 (700) | 100 | 1.52 ± 0.07 | 45.7 ± 2.7 | 3.6 ± 1.6 | 7.8 ± 4.0 |
Samples | Yield Strength (MPa) | Compressive Strength (MPa) | Young’s Modulus (GPa) |
---|---|---|---|
As-nitrided | 60 ± 3 | 80 ± 6 | 4.3 ± 0.7 |
973 K (700 °C) treated | 106 ± 4 | 147 ± 6 | 8.3 ± 0.6 |