Home Metallic Materials - Kovové materiály 2015 Metallic Materials Vol. 53 (2015), no. 6, pp.463-470

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Metallic Materials Vol. 53 (2015), no. 6, pp.463-470

Title: Erosion resistance of copper/alumina composite
Author: Š. KAVECKY, P. ŠTEFÁNIK, K. IŽDINSKÝ, Š. NAGY, P. ŠEBO, N. BERONSKÁ, A. OPÁLEK

Abstract: The ablation resistance of Cu and Cu/ Al2O3 subjected to 200 spark discharges was compared in this work. It appears that the volume lost in the course of sparking was 6 times higher for Cu than for Cu/ Al2O3 composite. Linear dependences of the amount of loss material on the number of electrical discharge analytical cycles for Cu/ Al2O3 composite material and pure copper were determined. Cu/ Al2O3 composite failure mode includes the evaporation as well as melting of constituents. The interaction of spark with the substrate is quite a discrete process strongly affected by local chemistry (composition). It results in irregular phases with respect to morphology as well as composition.

Keywords: ablation resistance, copper matrix, alumina preform
Published online: 25-Jan-2016
Year: 2015, Volume: 53, Issue: 6 Page From: 463, Page To: 470
doi:10.4149/km_2015_6_463


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