Properties and consolidation of nanocrystalline 3Cu–Al2O3 composite by rapid sintering
Nanopowders of Cu and Al2O3 were synthesized from 3CuO and 2Al powders by high-energy ball milling. Nanocrystalline Al2O3 reinforced composite was consolidated by pulsed-current activated sintering method within 2 min from mechanically synthesized powders of Al2O3 and Cu. The relative density of the composite was 96%. The average hardness and fracture toughness values obtained were 540 kg/mm2 and 6.3 MPa m1/2, respectively.
KeywordsRapid sintering Composite Nanophase Mechanical properties Cu–Al2O3
We are grateful for the financial support from the Korea Institute of Science and Technology, which was provided through the program for study on Development of Surface Treatment for Light Metals.
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