Microwave Sintering of SiAlON Ceramics with TiN Addition
Abstract
:1. Introduction
2. Materials and Method
2.1. Preparation of Powder Mixture
2.2. Microwave Sintering
3. Results and Discussion
3.1. Permittivity Measurement of the Starting Compositions
3.2. Phase and Microstructural Analysis
3.3. Mechanical Properties
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Material | Density (g/cm3) | Permittivity | Thermal Conductivity (W/mK) | Specific Heat (J/gK) | |||
---|---|---|---|---|---|---|---|
T = 25 °C | T = 1000 °C | T = 25 °C | T = 1000 °C | T = 25 °C | T = 1000 °C | ||
Pressed powders | 3.25 | 7.6 − i × 0.023 | 9.5 − i × 0.376 | 14 | 835 | 0.620 | 1.210 |
SiC | 3.21 | 9.2 − i × 1.60 | 7.3 − i × 0.25 | 280 | 90 | 0.6 | 1.2 |
Alumina fiber | 4.1 | 1.39 − i × 0.001 | 1.6 − i × 0.03 | 0.06 | 0.2 | 0.764 | 1.258 |
Air | 0.001225 | 1 | 1 | 0.0255 | 0.080 | 1.007 | 1.180 |
Sample Code | Composition | Max Sintering Temperature (°C) |
---|---|---|
SN-2.5 TiN | 25α:75βSiAlON-2.5 wt.%TiN | 780 |
SN-5 TiN | 25α:75βSiAlON-5 wt.%TiN | 850 |
Sample Code | Real (ε′) | Imaginary (ε″) | Loss Tangent (tgδ) = (ε″/ε′) |
---|---|---|---|
25α:75β-SiAlON (SN) | 1.63 ± 0.01 | 0.01 ± 0.001 | 0.006 |
SN-2.5 TiN | 1.92 ± 0.01 | 0.15 ± 0.001 | 0.08 |
SN-5 TiN | 2.02 ± 0.01 | 0.18 ± 0.001 | 0.09 |
Sample Code | Sintering Time (h) | Sintering Temperature (°C) | Relative Density (%) |
---|---|---|---|
SN-2.5 TiN | 0.5 | 780 | 91 |
SN-5 TiN | 0.5 | 850 | 96 |
Sample Code | Sintering Time (h) | Vickers Hardness (GPa) | Vickers Indentation Fracture Toughness, VIF (MPa.m1/2) |
---|---|---|---|
SN-2.5 TiN | 0.5 | 9.31 | 3.96 |
SN-5 TiN | 0.5 | 12.98 | 5.52 |
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Sevgi Canarslan, Ö.; Rosa, R.; Köroğlu, L.; Ayas, E.; Kara, A.; Veronesi, P. Microwave Sintering of SiAlON Ceramics with TiN Addition. Materials 2019, 12, 1345. https://doi.org/10.3390/ma12081345
Sevgi Canarslan Ö, Rosa R, Köroğlu L, Ayas E, Kara A, Veronesi P. Microwave Sintering of SiAlON Ceramics with TiN Addition. Materials. 2019; 12(8):1345. https://doi.org/10.3390/ma12081345
Chicago/Turabian StyleSevgi Canarslan, Özgür, Roberto Rosa, Levent Köroğlu, Erhan Ayas, Alpagut Kara, and Paolo Veronesi. 2019. "Microwave Sintering of SiAlON Ceramics with TiN Addition" Materials 12, no. 8: 1345. https://doi.org/10.3390/ma12081345