Influence of Cold Spray Nozzle Displacement Strategy on Microstructure and Mechanical Properties of Cu/SiC Composites Coating

Abstract:

In this work an influence of cold spray nozzle displacement parameters on the properties of copper-silicon carbide cold spray deposits is considered. In particular the influence of nozzle traverse speed and distance between deposited tracks on the coating porosity and behavior during compressive tests was analyzed. It was shown that cold spraying at low nozzle traverse speed leads to formation of thick tracks with quasi-triangular cross-section. As a consequence, the particle impact angle on the sides of spraying track increases that. Thus, the particle deformation at impact on the track periphery becomes insufficient and local porosity value rises. Increase of nozzle traverse speed allows increasing coating density and mechanical properties due to amelioration of particle deformation conditions. Compressive tests revealed significant anisotropy of mechanical properties of copper-silicon carbide cold spray deposits. In particular, compressive strength measured in vertical direction (perpendicular to the substrate) was significantly higher than one measured in horizontal plane (parallel to substrate). This anisotropy could be explained by the orientation of particle deformation pattern during impact.

• Periodical: Key Engineering Materials (Volume 813)
• Pages: 110-115
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.813.110
• Online since: July 2019
• Authors: Olga Matts, Hussein Hammoud*, Alexey Sova, Zineb Bensaid, Guillaume Kermouche, Helmut Klöcker, Cédric Bosch, Nathalie Texier-Mandoki
• Keywords: Cold Spray, Copper, Mechanical Properties, Microstructure, Nuclear Waste Storage, Powder Mixtures, Silicon Carbide

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