Articles - Rapid low-temperature consolidation of nanocrystalline Co-ZrO2 composite by pulsed current activated sintering and its mechanical properties
- In-Jin Shon* and Na-Ra Park
- Division of Advanced Materials Engineering, the Research Center of Advanced Materials Development, Chonbuk National University, 664-14 Deokjin-dong 1-ga, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea
Abstract
Nanopowders of Co and ZrO2 were synthesized from Co3O4 and Zr by high energy ball milling. The powder sizes of Co and ZrO2 were 10 nm and 16 nm, respectively. Highly dense nanostructured 3Co-2ZrO2 composite was consolidated by pulsed current activated sintering method within 3 minutes from the mechanically synthesized powders (Co-ZrO2) and horizontal milled Co3O4 + Zr powders under the 1 GPa pressure. The grain sizes of Co and ZrO2 in the composite were calculated. The average hardness and fracture toughness values of nanostuctured 3Co-2ZrO2 composite were investigated.
Keywords: Rapid sintering, Composite, Nanomaterial, Mechanical properties, Co-ZrO2.
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