Mechanochemical synthesis and rapid sintering of nanocrystalline AlCr2-2Al2O3 composite and its mechanical properties
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초록
Nanopowders of AlCr2 and Al2O3 were synthesized during high energy ball milling. Densely nanostructured AlCr2-2Al2O3composite was consolidated by high-frequency induction heated sintering within 2 min from milled powders. Highly denseAlCr2-2Al2O3 composite with relative density of up to 96% was produced under application of a 80 MPa pressure and theinduced current. The fracture toughness of a AlCr2-Al2O3 composite in this study is similar to that of previous study, whilethe hardness of a AlCr2-Al2O3 composite in this study is better than that of previous study due to the grain refinement. Thefracture toughness of AlCr2-2Al2O3 composite is higher than that of pure Al2O3. The microstructure and mechanical propertieswere investigated using FE-SEM with EDS and Vickers hardness tester.
Abstract
Nanopowders of AlCr2 and Al2O3 were synthesized during high energy ball milling. Densely nanostructured AlCr2-2Al2O3composite was consolidated by high-frequency induction heated sintering within 2 min from milled powders. Highly denseAlCr2-2Al2O3 composite with relative density of up to 96% was produced under application of a 80 MPa pressure and theinduced current. The fracture toughness of a AlCr2-Al2O3 composite in this study is similar to that of previous study, whilethe hardness of a AlCr2-Al2O3 composite in this study is better than that of previous study due to the grain refinement. Thefracture toughness of AlCr2-2Al2O3 composite is higher than that of pure Al2O3. The microstructure and mechanical propertieswere investigated using FE-SEM with EDS and Vickers hardness tester.
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