Title: Microstructure and properties of Cu-Al₂O₃ composites prepared by powder metallurgy

Authors: M. Besterci, L. Kovac

Addresses: Institute of Materials Research, Slovak Academy of Sciences, 04353 Kosice, Watsonova 47, Slovakia. Institute of Materials Research, Slovak Academy of Sciences, 04353 Kosice, Watsonova 47, Slovakia

Abstract: A review starting from material science trough production technology to testing properties of the Cu-Al₂O₃ system, based on several years of research and development in materials research, is presented. Microstructural design, microstructure evaluation by different methods, first the importance of correct secondary phase particle spatial distribution evaluation, influence of microstructure on properties, and modifications of production technology, are described. Evaluations are compared to microstructural parameters of a real material: volume fraction, distribution calculations, as well as interparticle distance. Strength and plastic properties at room and higher temperatures are presented and the failure mechanism described. A simplified model of the failure mechanism is proposed. Influence of dispersed Al₂O₃ particles on recrystallisation is characterised, too.

Keywords: Cu-Al₂O₃ system; fracture; mechanical properties; microstructure; recrystallisation; strengthening.

DOI: 10.1504/IJMPT.2003.003584

International Journal of Materials and Product Technology, 2003 Vol.18 No.1/2/3, pp.26 - 56

Published online: 21 Sep 2003 *

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