Articles
  • Mechanochemical synthesis and rapid consolidation of nanostructured 2Co-ZrO2 composite by pulsed current activated heating
  • Bong-Won Kwaka, Byung-Su Kimb and In-Jin Shona,*
  • a Division of Advanced Materials Engineering, the Research Center of Hydrogen and Fuel Cell, Chonbuk National University, 664-14 Deokjin-dong 1-ga, Deokjin-gu, Jeonju, Jeonbuk 561-756, Korea b Minerals Resources Research Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350 Korea
Abstract
Despite of many attractive properties, the low fracture toughness of ZrO2 ceramic limits its wide application. One of the most obvious tactics to improve the mechanical properties has been to add a reinforcing agent to formulate a nanostructured composite materials. Nanopowders of Co and ZrO2 were synthesized from 2CoO and Zr by high energy ball milling. The powder sizes of Co and ZrO2 were about 27 nm and 37 nm, respectively. Dense nanocrystalline 2Co-ZrO2 composite was consolidated by pulsed current activated sintering method within two minutes from the mechanically synthesized powders(2Co-ZrO2). The average hardness and fracture toughness values of nanostuctured 2Co-ZrO2 composite were also investigated.

Keywords: Sintering, Composite, Nanomaterial, Mechanical properties, Co-ZrO2.

This Article

  • 2015; 16(5): 451-456

    Published on Oct 31, 2015