Mechanochemical synthesis and rapid consolidation of nanocrystalline 3NiAl-Al2O3 composites
- Mechanochemical synthesis and rapid consolidation of nanocrystalline 3NiAl-Al2O3 composites
- 손인진; 고인용; 조성훈; 도정만; 윤진국; 박상환
- Issue Date
- Journal of Nanomaterials
- VOL 2011, 1-5
- Nanopowders of 3NiAl and Al2O3 were synthesized from3NiOand 5Al powders by high-energy ball milling.Nanocrystalline Al2O3
reinforced composite was consolidated by high-frequency induction-heated sintering within 3 minutes from mechanochemically
synthesized powders of Al2O3 and 3NiAl. The advantage of this process is that it allows very quick densification to near theoretical
density and inhibition grain growth. Nanocrystalline materials have received much attention as advanced engineering materials
with improved physical and mechanical properties. The relative density of the composite was 97%. The average Vickers hardness
and fracture toughness values obtained were 804 kg/mm2 and 7.5MPa ·m1/2, respectively.
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