Abstract
In the present work, homogeneous dispersion of MWCNTs in ZrO2 matrix was achieved by the chemical modification of MWCNTs and the formation of noncovalent attachment between carboxyl acid (–COOH) groups on MWCNTs and ZrO2 particles to obtain better compatibility of MWCNTs in ZrO2 matrix. 3Y-TZP/4wt% MWCNTs composite exhibited the best indentation toughness of 6.24MPam1/2 increasing 31% over monolithic ZrO2. Nanoindentation measurements showed that Young׳s modulus, hardness and contact-damage-resistance decreased with increasing the MWCNTs content. Moreover, the electrical conductivity slightly increased for MWCNTs weight fraction below 1wt% and displayed a dramatic increment with a maximum corresponding to MWCNTs weight fraction of 4wt%, which can be described by the percolation theory.
Published Version
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