Abstract
Nb₂O5 and Zr powders at a molar ratio of 1:2.5 were milled using a high-energy ball mill. The mixture powders produced Nb and ZrO₂ nanopowders through a solid replacement reaction (Nb₂O5+ 2.5Zr 2Nb + 2.5ZrO₂). The synthesized nanopowders were consolidated via high-frequency induction heated sintering (HFIHS) within two min. The mechanical properties (hardness and fracture toughness) of nanostructured 2Nb-2.5ZrO₂ composite were then evaluated. Both the hardness and fracture toughness of the 2Nb-2.5ZrO₂ composite were higher than those of monolithic ZrO₂.
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