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1 Bulletin of the Polish Academy of Sciences. Technical Sciences

1 2018

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The effect of ceramic type reinforcement on structure and properties of Cu-Al2O3 composites

100%

Strojny-Nędza A. , Pietrzak K. , Gładki A. , Nosewicz S. , Jarząbek D. M. , Chmielewski M.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2018

tom Vol. 66, nr 4

553--560

The purpose of this paper is to elaborate on mechanical alloying conditions for a composite powder consisting of copper and brittle aluminium oxides. Detailed analysis of the Cu-Al2O3 powder mixture structure obtained in the mechanical alloying process allows for the study of the homogenization phenomena and for obtaining grains (in composite form) with a high degree of uniformity. The Cu-5vol.%Al2O3 composites were obtained by means of the spark plasma sintering technique. The results presented herein were studied and discussed in terms of the impact of using a different form of aluminium oxide powder and a different shape of copper powder on composite properties. Research methodology included microstructure analysis as well as its relation to the strength of Cu-Al2O3 interfaces. It transpires from the results presented below that the application of electrocorundum as a reinforcement phase in composites decreases porosity in the ceramic phase, thus improving thermal properties and interfacial strength.

The effect of ceramic type reinforcement on structure and properties of Cu-Al2O3 composites

100%

Pietrzak K. , Strojny-Nędza A. , Gładki A. , Nosewicz S. , Jarząbek D. M. , Chmielewski M.