A comparison of the effects of multi-wall and single-wall carbon nanotube additions on the properties of zirconia toughened alumina composites

Field-assisted/spark plasma sintering behavior of CNT-reinforced zirconia composites: A comparative study between model and experiments

“…These excellent characteristics have motivated large-scale research activities to process CNTcontaining composites to improve the host matrix material. Ceramic matrix nanocomposites reinforced by CNTs have been put forward as excellent candidates for a wide range of applications such as catalysts, refractory materials, biosensors, and in orthopedic medicine [4][5][6][7].…”

Sintering in a graphite powder bed of alumina-toughened zirconia/carbon nanotube composites: a novel way to delay hydrothermal degradation

“…Although the details of the experimental procedures performed in this study have already been published elsewhere [24,25], herein they are briefly summarised. Homogeneous mixtures of TZ-3Yþ 13 wt% Al 2 O 3 þ 0.025 wt% MgOþ 2 wt% m-ZrO 2 þ 0.01 wt% MWCNTs (henceforth ATZ/MWCNT/G (sintered in a graphite powder bed)), TZ-3Yþ 13 wt% Al 2 O 3 þ 0.025 wt% MgOþ 2 wt% m-ZrO 2 (henceforth ATZ/A (sintered in an alumina powder bed)) and zirconia Tosoh TZ-3Y Eþ 15 wt% Sumitomo AKP-50 alumina (henceforth NATZ/G (sintered in a graphite powder bed) were carefully prepared.…”

Investigation of the microstructure, mechanical properties and cell viability of zirconia-toughened alumina composites reinforced with carbon nanotubes

“…This could led to a stronger bonding than that of CNTs and higher fracture toughness, ³4.85 MPa·m 1/2 . A study 15) on pressureless sintered ZTA showed that while Vickers hardness remains approximately constant (³16 to 15.6 GPa), fracture toughness of ZTA increased from 3.3 to 4. Table 1 shows that the addition of YSZ and CNTs also affected the flexure strength.…”

“…On the other hand, Wang et al reported the fracture toughness as ³3.3 MPa·m 1/2 for the same system. 15) Moreover, researchers found that CNT addition can prevent densification, and it can lead to weak or strong cohesion with the matrix grains depending on the CNT content. In this study, it was aimed to investigate and highlight the importance of nanotube position within the microstructure and the resulting effects on the properties of alumina-based ceramics.…”