Plasma synthesized SiC powder obtained from quartz and carbonaceous residue of waste tires was successfully sintered at 1925 ℃ by pressureless liquid-phase method using yttria and alumina as sintering aids (T-SiC). Comparison with sintered SiC obtained from commercial powder (C-SiC) put in evidence of similar sintered density (98%T.D.), but much finer microstructure of T-SiC than that of C-SiC. T-SiC also showed higher flexural strength than C-SiC both at room temperature (508 vs. 458 MPa) and at 1500 ℃ (280 vs. 171 MPa). Difference in liquid phase was responsible for the differences in hardness and fracture toughness. The high value of the Young’s modulus of T-SiC (427 MPa) confirmed the high degree of sinterability of this powder and that it can be a promising candidate for structural applications with high added value.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Electronic, Optical and Magnetic Materials
Magnani, G., Galvagno, S., Sico, G., Portofino, S., Freda, C., & Burresi, E. (2016). Sintering and mechanical properties of β‐SiC powder obtained from waste tires. Journal of Advanced Ceramics, 5(1), 40 - 46. https://doi.org/10.1007/s40145-015-0170-0