Articles
  • Consolidation of a nanostructured Al2O3 reinforced Fe-Cr composite by rapid sintering and its mechanical properties
  • In-Yong Koa, In-Jin Shona,b,*, Jung-Mann Dohc, Jin-Kook Yoonc, Sang-Whan Parkc and Na-Ra Parka
  • a Division of Advanced Materials Engineering and the Research Center of Advanced Materials Development, Engineering College, Chonbuk National University,Chonbuk, 561-756, Republic of Korea b Department of Hydrogen and Fuel Cells Engineering, Specialized Graduate School, Chonbuk National University,Chonbuk, 561-756, Republic of Korea c Advanced Fuctional Materials Research Center, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 130-650, Republic of Korea
Abstract
Nano-powders of Fe0.67Cr0.33 and Al2O3 were synthesized from CrO3 and 2FeAl powders by high energy ball milling. A highly dense nanocrystalline 3Fe0.67Cr0.33-Al2O3 composite was consolidated by a pulsed current activated sintering (PCAS) method within 2 minutes from mechanically synthesized powders of Al2O3 and Fe0.67Cr0.33. The average hardness and fracture toughness values obtained were 840 kg/mm2 and 10 MPa·m1/2, respectively.

Keywords: Nanosructured materials, Sintering, Mechanical alloying, Mechanical properties, Composite materials.

This Article

  • 2011; 12(1): 70-73

    Published on Feb 28, 2011