Home Metallic Materials - Kovové materiály 2015 Metallic Materials Vol. 53 (2015), no. 6, pp.409-414

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Metallic Materials Vol. 53 (2015), no. 6, pp.409-414

Title: The electrical properties of nanocrystalline Cu-Al2O3
Author: M. OROLINOVA, J. ĎURIŠIN, K. ĎURIŠINOVÁ, Z. DANKOVÁ, M. BESTERCI

Abstract: Nanocrystalline (nc) Cu powders with Al2O3 dispersoid (1–5 vol.% Al2O3) were prepared by combination of phase transformations with intensive milling and the following consolidation by pressing, sintering and hot extrusion. The electrical properties of the composites were analysed in relation to their microstructure and strength. The main contribution to the electrical resistivity was attributed to the grain/crystallite size of Cu matrix. The fraction of Fe impurities dissolved within the Cu matrix and the amount of Al2O3 particles in the Cu matrix affected the electrical resistivity remarkably. The optimal combination of electrical and strength properties can be achieved by cut-down of Al2O3 content and by optimization of dispersoid distribution in the matrix.

Keywords: nanocrystalline Cu-Al2O3 alloys, dispersion strengthening, electrical properties, thermal stability
Published online: 25-Jan-2016
Year: 2015, Volume: 53, Issue: 6 Page From: 409, Page To: 414
doi:10.4149/km_2015_6_409


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