Articles
  • Simultaneously synthesis and sintering of a nanostructured Ti-Al2O3 composite by pulsed current activated heating
  • Jin-Kook Yoona and In-Jin Shonb,*
  • a Materials Architecturing Research Center, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 130 650, Korea b Division of Advanced Materials Engineering, the Research Center of Hydrogen Fuel Cell, Chonbuk National University, 664-14 Deokjin-dong 1-ga, Deokjin-gu, Jeonju, Jeonbuk 561-756, Korea
Abstract
Nanopowders of TiO and Al were fabricated using high energy ball milling. Dense nanostuctured 3Ti-Al2O3 composite was simultaneously synthesized and sintered by pulsed current activated heating within 2 min in one step from mechanically activated powders of 3TiO and 2Al. The advantage of this process is that it allows very quick densification to near theoretical density and prohibition of grain growth in nanostructured materials. Highly dense 3Ti-Al2O3 with relative density of up to 99.9% was produced under simultaneous application of a 80 MPa pressure and the pulsed current. The average hardness and fracture toughness values of the composite were 1439 kg/mm2 and 7MPa • m1/2, respective

Keywords: Synthesis, Composite materials, Nanomaterials, Mechanical properties, Sintering.

This Article

  • 2016; 17(6): 606-610

    Published on Jun 30, 2016