| Autor: |
Lodhe, Mangesh, Bhargav, Amit, Wasan, Awin, Logesh, G., Parmar, Rajeev, Balasubramanian, M. |
| Zdroj: |
Journal of the Korean Ceramic Society; July 2024, Vol. 61 Issue: 4 p644-653, 10p |
| Abstrakt: |
Polycarbosilane-derived SiCW/SiC composites were processed by spark plasma sintering (SPS). Whisker-reinforced composites were densified with faster rates to a maximum density of ~ 98%, indicative of positive influence of SiC whiskers on densification behavior. Electron backscattered diffraction study confirmed the presence of twins in the sintered composites. A misorientation angle of 60° resembled to {111} twin boundaries. Twin density was found to increase with SPS temperature and whisker contest. Twin boundaries were found to be responsible for β→αSiC transformation. Hardness increased sharply with the increase in whisker content and a decrease in grain size. The maximum hardness of 23.4 GPa was observed in 20% SiCW/SiC composite. Nanoindentation study reflects the positive effect of whiskers on hardness and elastic modulus. |
| Databáze: |
Supplemental Index |
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