Rapid Consolidation of Nanocrystalline Al2O3 Reinforced Cr Composite from Mechanically Alloyed Powders by Pulsed Current Activated Sintering
Nanopowders of Cr and Al2O3 was fabricated from CrO3 and 2Al by high energy ball milling. Dense nanocrystalline Cr-Al2O3 composite was consolidated by pulsed current activated sintering (PCAS) method within 1 min from mechanically alloyed powders. Highly dense Cr-Al2O3 with relative density of up to 99% was produced under simultaneous application of a 80 MPa pressure and the pulsed current. The average grain size and mechanical properties of the composite were investigated.
Joong Hee Lee
I. J. Shon et al., "Rapid Consolidation of Nanocrystalline Al2O3 Reinforced Cr Composite from Mechanically Alloyed Powders by Pulsed Current Activated Sintering", Advanced Materials Research, Vols. 123-125, pp. 197-200, 2010