Articles
  • Mechanical properties and consolidation of a nanocrystalline Al2O3 -reinforced Ni composite from mechanically synthesized powders by rapid sintering
  • Dong-Mok Leea, Woo-Yeon Konga, Je-Shin Parkb, Won Baek Kimb and In-Jin Shona,c,*
  • 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 Minerals and Materials Processing Division, Korea Institute of Geoscience, Mining and Materials , Daejeon, Republic of Korea c Department of Hydrogen and Fuel Cells Engineering, Specialized Graduate School, Chonbuk National University,Chonbuk, 561-756, Republic of Korea
Abstract
Nano-powders of Ni and Al2O3 were synthesized from NiO and Al powders by high energy ball milling. The nanocrystalline Al2O3 - reinfored composite was consolidated by a pulsed current activated sintering(PCAS)) method within 2 minutes from mechanically synthesized powders of Al2O3 and 3Ni. The average hardness and fracture toughness values obtained were 690 kg/mm2 and 6.1MPa·m1/2, respectively.

Keywords: Rapid sintering, Composite, Nanophase, Mechanical properties, Ni-Al2O3.

This Article

  • 2009; 10(4): 529-533

    Published on Aug 31, 2009