Investigation of correlation between physical properties and microstructure geometrical parameters of Cr-Cu composite material used for vacuum arcing contacts
Journal Title: Mining – Informatics, Automation and Electrical Engineering - Year 2016, Vol 526, Issue 2
Abstract
A new microstructure quality index is proposed, suitable for Cr-Cu system metal-matrix materials used for arc-suppressing electrical contacts of vacuum switches for high voltages (10-36 кV) and high currents (20-100 кА). Based on the example of some physical properties of the Cr-50Cu composite and its microstructure geometrical parameters it was shown that there is strong correlation between the strengthening phase distribution character, electrical conductivity and mechanical characteristics obtained under the strain test. It was ascertained that the proposed index of accordance of structure to the regular one, rationed to the size of strengthening phase particles and fractal dimension of material microstructure, were strongly related to yield strength and electric conductivity (correlation coefficient reaches 0.98 ... 0.99).
Authors and Affiliations
A. Khomenko, E. Khomenko, G. А. Bagliuk, Bogdan Miedziński, Artur Kozłowski
Keywords
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