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Fabrication and magnetic properties of Al2O3/Co nanocomposites

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Al2O3/Co nanocomposites were synthesized by dispersing submicron-sized cobalt particles into Al2O3 matrix via vacuum hot-pressing technique. The size of cobalt particles increased with increasing cobalt content, and the growth as well as coalescence of cobalt particles occurred at 50 wt. Co addition. The phases formed in the Al2O3/Co composites were f-Co(fcc), h-Co(hcp), alpha-Al2O3, and a small amount of C. Ferromagnetic properties with high mechanical properties were achieved simultaneously by incorporating submicron-sized cobalt particles into the Al2O3 matrix. (C) 2003 Elsevier B.V. All rights reserved. References: 13

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