The effects of multiwalled carbon nanotubes on the hot-pressed 3mol% yttria stabilized zirconia ceramics

The effects of multiwalled carbon nanotubes on the hot-pressed 3mol% yttria stabilized zirconia ceramics

The bulk composites of 3mol% yttria stabilized zirconia ceramics reinforced by multiwalled carbon nanotubes were prepared by ball milling, spray-drying and hot-pressing processes. The effects of MWCNTs' contents and heterocoagulation pretreatment on the mechanical properties of 3Y-ZrO(2)/MWCNTs...

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Veröffentlicht in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2009-09, Vol.520 (1-2), p.153-157
Hauptverfasser: Zhou, Ji Ping, Gong, Qian Ming, Yuan, Ke Yi, Wu, Jian Jun, Chen, Yi fang, Li, Chen Sha, Liang, Ji
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container_title Materials science & engineering. A, Structural materials : properties, microstructure and processing
container_volume 520
creator Zhou, Ji Ping
Gong, Qian Ming
Yuan, Ke Yi
Wu, Jian Jun
Chen, Yi fang
Li, Chen Sha
Liang, Ji
description The bulk composites of 3mol% yttria stabilized zirconia ceramics reinforced by multiwalled carbon nanotubes were prepared by ball milling, spray-drying and hot-pressing processes. The effects of MWCNTs' contents and heterocoagulation pretreatment on the mechanical properties of 3Y-ZrO(2)/MWCNTs' composites were investigated at room temperature. Experimental results showed that the heterocoagulation pretreatment played a vital role in homogeneous dispersion of MWCNTs in the ceramic matrix. The flexural strength of 989.8+/-20.0MPa and fracture toughness of 5.77+/-0.06MPaM(1(/(2) were obtained for the composite with 1.0wt.% of MWCNTs' content, which were 135.3MPa (or 8.4%) higher in flexural strength and 0.92MPaM(1(/(2) (or 21.1%) higher in fracture toughness than those of blank 3Y-ZrO(2), respectively. The mechanisms of strengthening and toughening of the composites could be attributed to the synergic effects of bridging, pulling out of MWCNTs and their promotive effects on the phase transformation of the ceramics.
doi_str_mv 10.1016/j.msea.2009.05.014
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title The effects of multiwalled carbon nanotubes on the hot-pressed 3mol% yttria stabilized zirconia ceramics
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