Articles
  • Simultaneous synthesis and consolidation of a nanocrystalline 17.14Fe0.7Cr0.2Al0.1-Si3N4 composite by pulsed current activated heating
  • In-Jin Shona,*, Song-Lee Dua, In-Yong Koa, Chul-Gyu Songb, Jung-Mann Dohc, Jin-Kook Yoonc and Sang-Whan Parkc
  • a Division of Advanced Materials Engineering and Research Center of Advanced Materials Development, Engineering College, Chonbuk National University, Chonbuk, 561-756, Republic of Korea b Division of Electronic Engineering, Engineering College, Chonbuk National University, Chonbuk, 561-756, Republic of Korea c Advanced Functional Materials Research Center, Korea Institute of Science and Technology, PO Box 131, Cheongryang, Seoul 130-650, Republic of Korea
Abstract
Nanopowders of Fe3N, Cr, Si and Al powders were fabricated by high-energy ball milling. A high-density nanocrystalline 17.14Fe0.7Cr0.2Al0.1-Si3N4 composite was simultaneously synthesized and consolidated by a pulsed current activated sintering (PCAS) method within two minutes from mechanically activated powders of Fe3N, Cr, Si and Al. The advantage of this process is that it allows very quick densification to near theoretical density and prohibits grain growth in nano-structured materials. The hardness of the composite was about 430 kg/mm2.

Keywords: Nanostructured materials, Sintering, Synthesis, Hardness, Composite materials.

This Article

  • 2012; 13(1): 71-75

    Published on Feb 28, 2012