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Journal of Advanced Ceramics  2016, Vol. 5 Issue (1): 40-46    doi: 10.1007/s40145-015-0170-0
Research Article     
Sintering and mechanical properties of β-SiC powder obtained from waste tires
aENEA, SSPT-PROMAS-TEMAF, Faenza Research Laboratories, Via Ravegnana 186, 48018 Faenza (RA), Italy
bENEA, SSPT-PROMAS-NANO, Portici Research Center, P.le Enrico Fermi 1, 80055 Portici (NA), Italy
cENEA, SSPT-PROMAS-MATAS, Brindisi Research Center, S.S. 7 Appia km 706,00, 72100 Brindisi, Italy
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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.

Key wordssintering      mechanical properties      SiC      structural application     
Received: 12 June 2015      Published: 15 January 2016
Corresponding Authors: G. MAGNANI   
Cite this article:

G. MAGNANI,S. GALVAGNO,G. SICO,S. PORTOFINO,C. FREDA,E. BURRESI. Sintering and mechanical properties of β-SiC powder obtained from waste tires. Journal of Advanced Ceramics, 2016, 5(1): 40-46.

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Specific surface area (m2/g)3113
Bulk density (g/cm3)0.86
Granule size (μm)0.35100
Al2O3 (wt%)5.75.5
Y2O3 (wt%)4.13.5
Aluminium (ppm)14101200
Oxygen (wt%)