Sintering and mechanical properties of β‐SiC powder obtained from waste tires

G. Magnani, S. Galvagno, G. Sico, S. Portofino, C. Freda, E. Burresi

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Abstract

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.
Original languageEnglish
Pages (from-to)40 - 46
Number of pages7
JournalJournal of Advanced Ceramics
Volume5
Issue number1
DOIs
Publication statusPublished - 1 Mar 2016

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All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

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