Article: Preparation and microstructure evolution of nanocomposite powder copper Journal: International Journal of Materials and Product Technology (IJMPT) 2005 Vol.23 No.1/2 pp.42 - 68 Abstract: The paper is aimed at preparing the nanocrystalline Cu-Al2O3 and Cu-MgO powders with 1-10 vol.% of the dispersoid by a combination of mechanical milling and phase precursor transformations. The secondary particles were prepared in situ within CuO powder. The nanometric Cu matrix was obtained by different reduction methods of the CuO precursor. The influence of dispersoid quantity and different technological parameters on the Cu microstructure was estimated. The study compares the microstructural evolution of Cu-3 vol.% MgO and Cu-3 vol.% Al2O3 composites. The effects of both oxides on the preservation of the initial powder nanostructure after consolidation and the thermal structural stability, as well as the tensile properties, are analysed. The results indicate that an alumina dispersoid is more suitable for nanostructure stabilisation of a Cu matrix compared to an MgO one, due to good coherency at the Cu/Al2O3interface. Inderscience Publishers - linking academia, business and industry through research

Title: Preparation and microstructure evolution of nanocomposite powder copper

Authors: Juraj Durisin, Katarina Durisinova, Maria Orolinova, Karel Saksl

Addresses: Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 043 53 Kosice, Slovak Republic. ' Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 043 53 Kosice, Slovak Republic. ' Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 043 53 Kosice, Slovak Republic. ' Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 043 53 Kosice, Slovak Republic

Abstract: The paper is aimed at preparing the nanocrystalline Cu-Al₂O₃ and Cu-MgO powders with 1-10 vol.% of the dispersoid by a combination of mechanical milling and phase precursor transformations. The secondary particles were prepared in situ within CuO powder. The nanometric Cu matrix was obtained by different reduction methods of the CuO precursor. The influence of dispersoid quantity and different technological parameters on the Cu microstructure was estimated. The study compares the microstructural evolution of Cu-3 vol.% MgO and Cu-3 vol.% Al₂O₃ composites. The effects of both oxides on the preservation of the initial powder nanostructure after consolidation and the thermal structural stability, as well as the tensile properties, are analysed. The results indicate that an alumina dispersoid is more suitable for nanostructure stabilisation of a Cu matrix compared to an MgO one, due to good coherency at the Cu/Al₂O₃interface.

Keywords: copper composites; dispersoids; interface stability; mechanical properties; microstructure; nanomaterials; powder technology; nanocomposites; nanocrystalline powders; mechanical milling; phase precursor transformations; nanostructure.

DOI: 10.1504/IJMPT.2005.006589

International Journal of Materials and Product Technology, 2005 Vol.23 No.1/2, pp.42 - 68

Published online: 23 Mar 2005 *

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Title: Preparation and microstructure evolution of nanocomposite powder copper

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