Analytical study on the incorporation of zirconia-based ceramics with carbon nanotubes: Dispersion methods and mechanical properties

摘要: Abstract Different volume fractions (1.3, 2.6 and 7.6 Vol%) of carbon nanotubes (CNTs) were dispersed within an 8Y TZP matrix using two different methods dispersion in wet dry media. Dispersed specimens subsequently processed by spark plasma sintering (SPS), the effects method, as well processing conditions on densification process studied. Sintering studies demonstrated that sample could hardly surpass relative density 0.94 after being soaked at 1350 °C for 10 min. Even a 50 °C increase temperature SPS (1400 °C) did not result higher sintered specimens. On other hand, showed close to 0.98. Scanning electron microscopy (SEM) images revealed presence entangled CNT pockets microstructure composite samples prepared via while CNTs observed be homogenously distributed fracture surface method. Moreover, disclosed kinetics composites. Maintenance through was confirmed transmission (TEM) Raman spectroscopy. Mechanical properties (hardness toughness) also evaluated micro-indentation test. Opposite hardness composites, their indentation toughness ascending trend function CNTs׳ fraction. SEM crack bridging major mechanism hindering propagation.