Mechanochemical synthesis and rapid consolidation of nanocrystalline 3NiAl-Al2O3 composites

Title
Mechanochemical synthesis and rapid consolidation of nanocrystalline 3NiAl-Al2O3 composites
Authors
손인진고인용조성훈도정만윤진국박상환
Issue Date
2011-12
Publisher
Journal of Nanomaterials
Citation
VOL 2011, 1-5
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/42038
ISSN
16874110
Appears in Collections:
KIST Publication > Article
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