▎ 摘　　要

ZrO2 and ZrO2-0.01 wt% GNPs powders were consolidated using spark plasma sintering (SPS) with uniaxial pressure of 20 MPa at varying temperature 1200, 1300 and 1400 degrees C. Microstructure and surface morphology were observed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The effects of temperature and the addition of GNPs to sintered composites on mechanical properties were investigated by using nano- and micro-indentation techniques. The increasing sintering temperature also resulted in an increase in grain size of sintered composites. Transitional behavior in hardness and elastic modulus of the composites was found and attributed to the beneficial effects of GNP addition. The experimental results have shown that the addition of GNPs could also lead to inhibition of grain growth and enhance fracture toughness, and an increase in the hardness of consolidated composites.