Mechanochemical Synthesis and Rapid Consolidation of Nanocrystalline 3NiAl- Al

Nanopowders of 3NiAl and Al2O3 were synthesized from 3NiO and 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 7.5 MPa⋅m1/2, respectively

Pulsed Current Activated Consolidation of Nanostructured Fe3Al and Its Mechanical Property

A nanopowder of Fe3Al was synthesized from 3Fe and Al by high-energy ball milling. A dense nanostructured Fe3Al was consolidated by pulsed current activated sintering method within 2 minutes from mechanically synthesized powders of Fe3Al and horizontally milled powders of 3Fe+Al. The grain size, sintering behavior, and hardness of Fe3Al sintered from horizontally milled 3Fe+Al powders and high-energy ball milled Fe3Al powder were compared

Mechanochemical Synthesis and Rapid Consolidation of Nanocrystalline 3NiAl-Al2O3 Composites

Nanopowders of 3NiAl and Al2O3 were synthesized from 3NiO and 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 7.5 MPa⋅m1/2, respectively